ICD-10-CM 7th Character Values · FY 2027 3 Values

7th Character Values: Encounter: Initial, Subsequent, Sequela ICD-10-CM

The most common 7th character set: A for the initial encounter (active treatment), D for subsequent encounters (healing or recovery phase) and S for sequela (late effects). Used across injuries, poisonings and other external-cause categories. In FY 2027 409 categories use this set, covering 31,412 complete codes.

✓ From the official FY 2027 ICD-10-CM Tabular ListDefinitions follow the Official Guidelines, Section I.A

Values

409

What Each Value Means 3 values

Character	Meaning
A	initial encounter
D	subsequent encounter
S	sequela

The Tabular List also prints “Fall from stool” in the 7th character list under W08, after value S.

ICD-10-CM

Categories That Use These Values 409 categories

409 of 409 shown

Category	Title	Chapter	Codes
M97	Periprosthetic fracture around internal prosthetic joint	Ch. 13	36
S00	Superficial injury of head	Ch. 19	288
S01	Open wound of head	Ch. 19	270
S03	Dislocation and sprain of joints and ligaments of head	Ch. 19	36
S04	Injury of cranial nerve	Ch. 19	114
S05	Injury of eye and orbit	Ch. 19	90
S06	Intracranial injury	Ch. 19	569
S07	Crushing injury of head	Ch. 19	12
S08	Avulsion and traumatic amputation of part of head	Ch. 19	30
S09	Other and unspecified injuries of head	Ch. 19	69
S10	Superficial injury of neck	Ch. 19	72
S11	Open wound of neck	Ch. 19	129
S12.8	Fracture of other parts of neck	Ch. 19	3
S12.9	Fracture of neck, unspecified	Ch. 19	3
S13	Dislocation and sprain of joints and ligaments at neck level	Ch. 19	75
S14	Injury of nerves and spinal cord at neck level	Ch. 19	183
S15	Injury of blood vessels at neck level	Ch. 19	150
S16	Injury of muscle, fascia and tendon at neck level	Ch. 19	12
S17	Crushing injury of neck	Ch. 19	9
S19	Other specified and unspecified injuries of neck	Ch. 19	24
S20	Superficial injury of thorax	Ch. 19	294
S21	Open wound of thorax	Ch. 19	288
S23	Dislocation and sprain of joints and ligaments of thorax	Ch. 19	108
S24	Injury of nerves and spinal cord at thorax level	Ch. 19	93
S25	Injury of blood vessels of thorax	Ch. 19	195
S26	Injury of heart	Ch. 19	42
S27	Injury of other and unspecified intrathoracic organs	Ch. 19	162
S28	Crushing injury of thorax, and traumatic amputation of part of thorax	Ch. 19	24
S29	Other and unspecified injuries of thorax	Ch. 19	42
S30	Superficial injury of abdomen, lower back, pelvis and external genitals	Ch. 19	216
S31	Open wound of abdomen, lower back, pelvis and external genitals	Ch. 19	558
S33	Dislocation and sprain of joints and ligaments of lumbar spine and pelvis	Ch. 19	57
S34	Injury of lumbar and sacral spinal cord and nerves at abdomen, lower back and pelvis level	Ch. 19	93
S35	Injury of blood vessels at abdomen, lower back and pelvis level	Ch. 19	222
S36	Injury of intra-abdominal organs	Ch. 19	336
S37	Injury of urinary and pelvic organs	Ch. 19	249
S38	Crushing injury and traumatic amputation of abdomen, lower back, pelvis and external genitals	Ch. 19	39
S39	Other and unspecified injuries of abdomen, lower back, pelvis and external genitals	Ch. 19	63
S40	Superficial injury of shoulder and upper arm	Ch. 19	144
S41	Open wound of shoulder and upper arm	Ch. 19	108
S43	Dislocation and sprain of joints and ligaments of shoulder girdle	Ch. 19	333
S44	Injury of nerves at shoulder and upper arm level	Ch. 19	72
S45	Injury of blood vessels at shoulder and upper arm level	Ch. 19	162
S46	Injury of muscle, fascia and tendon at shoulder and upper arm level	Ch. 19	216
S47	Crushing injury of shoulder and upper arm	Ch. 19	9
S48	Traumatic amputation of shoulder and upper arm	Ch. 19	54
S49.8	Other specified injuries of shoulder and upper arm	Ch. 19	9
S49.9	Unspecified injury of shoulder and upper arm	Ch. 19	9
S50	Superficial injury of elbow and forearm	Ch. 19	144
S51	Open wound of elbow and forearm	Ch. 19	108
S53	Dislocation and sprain of joints and ligaments of elbow	Ch. 19	261
S54	Injury of nerves at forearm level	Ch. 19	54
S55	Injury of blood vessels at forearm level	Ch. 19	135
S56	Injury of muscle, fascia and tendon at forearm level	Ch. 19	432
S57	Crushing injury of elbow and forearm	Ch. 19	18
S58	Traumatic amputation of elbow and forearm	Ch. 19	54
S59.8	Other specified injuries of elbow and forearm	Ch. 19	18
S59.9	Unspecified injury of elbow and forearm	Ch. 19	18
S60	Superficial injury of wrist, hand and fingers	Ch. 19	522
S61	Open wound of wrist, hand and fingers	Ch. 19	576
S63	Dislocation and sprain of joints and ligaments at wrist and hand level	Ch. 19	921
S64	Injury of nerves at wrist and hand level	Ch. 19	84
S65	Injury of blood vessels at wrist and hand level	Ch. 19	279
S66	Injury of muscle, fascia and tendon at wrist and hand level	Ch. 19	540
S67	Crushing injury of wrist, hand and fingers	Ch. 19	75
S68	Traumatic amputation of wrist, hand and fingers	Ch. 19	192
S69	Other and unspecified injuries of wrist, hand and finger(s)	Ch. 19	18
S70	Superficial injury of hip and thigh	Ch. 19	144
S71	Open wound of hip and thigh	Ch. 19	108
S73	Dislocation and sprain of joint and ligaments of hip	Ch. 19	126
S74	Injury of nerves at hip and thigh level	Ch. 19	45
S75	Injury of blood vessels at hip and thigh level	Ch. 19	162
S76	Injury of muscle, fascia and tendon at hip and thigh level	Ch. 19	216
S77	Crushing injury of hip and thigh	Ch. 19	27
S78	Traumatic amputation of hip and thigh	Ch. 19	54
S79.8	Other specified injuries of hip and thigh	Ch. 19	18
S79.9	Unspecified injury of hip and thigh	Ch. 19	18
S80	Superficial injury of knee and lower leg	Ch. 19	144
S81	Open wound of knee and lower leg	Ch. 19	108
S83	Dislocation and sprain of joints and ligaments of knee	Ch. 19	351
S84	Injury of nerves at lower leg level	Ch. 19	45
S85	Injury of blood vessels at lower leg level	Ch. 19	270
S86	Injury of muscle, fascia and tendon at lower leg level	Ch. 19	216
S87	Crushing injury of lower leg	Ch. 19	18
S88	Traumatic amputation of lower leg	Ch. 19	54
S89.8	Other specified injuries of lower leg	Ch. 19	9
S89.9	Unspecified injury of lower leg	Ch. 19	9
S90	Superficial injury of ankle, foot and toes	Ch. 19	306
S91	Open wound of ankle, foot and toes	Ch. 19	360
S93	Dislocation and sprain of joints and ligaments at ankle, foot and toe level	Ch. 19	336
S94	Injury of nerves at ankle and foot level	Ch. 19	54
S95	Injury of blood vessels at ankle and foot level	Ch. 19	135
S96	Injury of muscle and tendon at ankle and foot level	Ch. 19	180
S97	Crushing injury of ankle and foot	Ch. 19	45
S98	Traumatic amputation of ankle and foot	Ch. 19	108
S99.8	Other specified injuries of ankle and foot	Ch. 19	18
S99.9	Unspecified injury of ankle and foot	Ch. 19	18
T07	Unspecified multiple injuries	Ch. 19	3
T14	Injury of unspecified body region	Ch. 19	9
T15	Foreign body on external eye	Ch. 19	36
T16	Foreign body in ear	Ch. 19	9
T17	Foreign body in respiratory tract	Ch. 19	150
T18	Foreign body in alimentary tract	Ch. 19	45
T19	Foreign body in genitourinary tract	Ch. 19	21
T20	Burn and corrosion of head, face, and neck	Ch. 19	264
T21	Burn and corrosion of trunk	Ch. 19	216
T22	Burn and corrosion of shoulder and upper limb, except wrist and hand	Ch. 19	528
T23	Burn and corrosion of wrist and hand	Ch. 19	648
T24	Burn and corrosion of lower limb, except ankle and foot	Ch. 19	360
T25	Burn and corrosion of ankle and foot	Ch. 19	288
T26	Burn and corrosion confined to eye and adnexa	Ch. 19	90
T27	Burn and corrosion of respiratory tract	Ch. 19	24
T28	Burn and corrosion of other internal organs	Ch. 19	54
T33	Superficial frostbite	Ch. 19	111
T34	Frostbite with tissue necrosis	Ch. 19	111
T36	Poisoning by, adverse effect of and underdosing of systemic antibiotics	Ch. 19	198
T37	Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics	Ch. 19	144
T38	Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified	Ch. 19	234
T39	Poisoning by, adverse effect of and underdosing of nonopioid analgesics, antipyretics and antirheumatics	Ch. 19	162
T40	Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]	Ch. 19	258
T41	Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases	Ch. 19	126
T42	Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs	Ch. 19	162
T43	Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified	Ch. 19	354
T44	Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system	Ch. 19	198
T45	Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified	Ch. 19	270
T46	Poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system	Ch. 19	198
T47	Poisoning by, adverse effect of and underdosing of agents primarily affecting the gastrointestinal system	Ch. 19	180
T48	Poisoning by, adverse effect of and underdosing of agents primarily acting on smooth and skeletal muscles and the respiratory system	Ch. 19	180
T49	Poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs	Ch. 19	180
T50	Poisoning by, adverse effect of and underdosing of diuretics and other and unspecified drugs, medicaments and biological substances	Ch. 19	342
T51	Toxic effect of alcohol	Ch. 19	72
T52	Toxic effect of organic solvents	Ch. 19	108
T53	Toxic effect of halogen derivatives of aliphatic and aromatic hydrocarbons	Ch. 19	108
T54	Toxic effect of corrosive substances	Ch. 19	60
T55	Toxic effect of soaps and detergents	Ch. 19	24
T56	Toxic effect of metals	Ch. 19	144
T57	Toxic effect of other inorganic substances	Ch. 19	72
T58	Toxic effect of carbon monoxide	Ch. 19	60
T59	Toxic effect of other gases, fumes and vapors	Ch. 19	144
T60	Toxic effect of pesticides	Ch. 19	84
T61	Toxic effect of noxious substances eaten as seafood	Ch. 19	72
T62	Toxic effect of other noxious substances eaten as food	Ch. 19	60
T63	Toxic effect of contact with venomous animals and plants	Ch. 19	456
T64	Toxic effect of aflatoxin and other mycotoxin food contaminants	Ch. 19	24
T65	Toxic effect of other and unspecified substances	Ch. 19	192
T66	Radiation sickness, unspecified	Ch. 19	3
T67	Effects of heat and light	Ch. 19	36
T68	Hypothermia	Ch. 19	3
T69	Other effects of reduced temperature	Ch. 19	27
T70	Effects of air pressure and water pressure	Ch. 19	24
T71	Asphyxiation	Ch. 19	117
T73	Effects of other deprivation	Ch. 19	18
T74	Adult and child abuse, neglect and other maltreatment, confirmed	Ch. 19	51
T75	Other and unspecified effects of other external causes	Ch. 19	48
T76	Adult and child abuse, neglect and other maltreatment, suspected	Ch. 19	48
T78	Adverse effects, not elsewhere classified	Ch. 19	81
T79	Certain early complications of trauma, not elsewhere classified	Ch. 19	54
T80	Complications following infusion, transfusion and therapeutic injection	Ch. 19	114
T81	Complications of procedures, not elsewhere classified	Ch. 19	240
T82	Complications of cardiac and vascular prosthetic devices, implants and grafts	Ch. 19	297
T83	Complications of genitourinary prosthetic devices, implants and grafts	Ch. 19	246
T84	Complications of internal orthopedic prosthetic devices, implants and grafts	Ch. 19	357
T85	Complications of other internal prosthetic devices, implants and grafts	Ch. 19	288
T88	Other complications of surgical and medical care, not elsewhere classified	Ch. 19	39
V00	Pedestrian conveyance accident	Ch. 20	168
V01	Pedestrian injured in collision with pedal cycle	Ch. 20	54
V02	Pedestrian injured in collision with two- or three-wheeled motor vehicle	Ch. 20	54
V03	Pedestrian injured in collision with car, pick-up truck or van	Ch. 20	54
V04	Pedestrian injured in collision with heavy transport vehicle or bus	Ch. 20	54
V05	Pedestrian injured in collision with railway train or railway vehicle	Ch. 20	54
V06	Pedestrian injured in collision with other nonmotor vehicle	Ch. 20	54
V09	Pedestrian injured in other and unspecified transport accidents	Ch. 20	27
V10	Pedal cycle rider injured in collision with pedestrian or animal	Ch. 20	21
V11	Pedal cycle rider injured in collision with other pedal cycle	Ch. 20	21
V12	Pedal cycle rider injured in collision with two- or three-wheeled motor vehicle	Ch. 20	21
V13	Pedal cycle rider injured in collision with car, pick-up truck or van	Ch. 20	21
V14	Pedal cycle rider injured in collision with heavy transport vehicle or bus	Ch. 20	21
V15	Pedal cycle rider injured in collision with railway train or railway vehicle	Ch. 20	21
V16	Pedal cycle rider injured in collision with other nonmotor vehicle	Ch. 20	21
V17	Pedal cycle rider injured in collision with fixed or stationary object	Ch. 20	21
V18	Pedal cycle rider injured in noncollision transport accident	Ch. 20	21
V19	Pedal cycle rider injured in other and unspecified transport accidents	Ch. 20	48
V20	Motorcycle rider injured in collision with pedestrian or animal	Ch. 20	42
V21	Motorcycle rider injured in collision with pedal cycle	Ch. 20	42
V22	Motorcycle rider injured in collision with two- or three-wheeled motor vehicle	Ch. 20	42
V23	Motorcycle rider injured in collision with car, pick-up truck or van	Ch. 20	42
V24	Motorcycle rider injured in collision with heavy transport vehicle or bus	Ch. 20	42
V25	Motorcycle rider injured in collision with railway train or railway vehicle	Ch. 20	42
V26	Motorcycle rider injured in collision with other nonmotor vehicle	Ch. 20	42
V27	Motorcycle rider injured in collision with fixed or stationary object	Ch. 20	42
V28	Motorcycle rider injured in noncollision transport accident	Ch. 20	42
V29	Motorcycle rider injured in other and unspecified transport accidents	Ch. 20	96
V30	Occupant of three-wheeled motor vehicle injured in collision with pedestrian or animal	Ch. 20	27
V31	Occupant of three-wheeled motor vehicle injured in collision with pedal cycle	Ch. 20	27
V32	Occupant of three-wheeled motor vehicle injured in collision with two- or three-wheeled motor vehicle	Ch. 20	27
V33	Occupant of three-wheeled motor vehicle injured in collision with car, pick-up truck or van	Ch. 20	27
V34	Occupant of three-wheeled motor vehicle injured in collision with heavy transport vehicle or bus	Ch. 20	27
V35	Occupant of three-wheeled motor vehicle injured in collision with railway train or railway vehicle	Ch. 20	27
V36	Occupant of three-wheeled motor vehicle injured in collision with other nonmotor vehicle	Ch. 20	27
V37	Occupant of three-wheeled motor vehicle injured in collision with fixed or stationary object	Ch. 20	27
V38	Occupant of three-wheeled motor vehicle injured in noncollision transport accident	Ch. 20	27
V39	Occupant of three-wheeled motor vehicle injured in other and unspecified transport accidents	Ch. 20	48
V40	Car occupant injured in collision with pedestrian or animal	Ch. 20	27
V41	Car occupant injured in collision with pedal cycle	Ch. 20	27
V42	Car occupant injured in collision with two- or three-wheeled motor vehicle	Ch. 20	27
V43	Car occupant injured in collision with car, pick-up truck or van	Ch. 20	108
V44	Car occupant injured in collision with heavy transport vehicle or bus	Ch. 20	27
V45	Car occupant injured in collision with railway train or railway vehicle	Ch. 20	27
V46	Car occupant injured in collision with other nonmotor vehicle	Ch. 20	27
V47	Car occupant injured in collision with fixed or stationary object	Ch. 20	27
V48	Car occupant injured in noncollision transport accident	Ch. 20	27
V49	Car occupant injured in other and unspecified transport accidents	Ch. 20	48
V50	Occupant of pick-up truck or van injured in collision with pedestrian or animal	Ch. 20	27
V51	Occupant of pick-up truck or van injured in collision with pedal cycle	Ch. 20	27
V52	Occupant of pick-up truck or van injured in collision with two- or three-wheeled motor vehicle	Ch. 20	27
V53	Occupant of pick-up truck or van injured in collision with car, pick-up truck or van	Ch. 20	27
V54	Occupant of pick-up truck or van injured in collision with heavy transport vehicle or bus	Ch. 20	27
V55	Occupant of pick-up truck or van injured in collision with railway train or railway vehicle	Ch. 20	27
V56	Occupant of pick-up truck or van injured in collision with other nonmotor vehicle	Ch. 20	27
V57	Occupant of pick-up truck or van injured in collision with fixed or stationary object	Ch. 20	27
V58	Occupant of pick-up truck or van injured in noncollision transport accident	Ch. 20	27
V59	Occupant of pick-up truck or van injured in other and unspecified transport accidents	Ch. 20	48
V60	Occupant of heavy transport vehicle injured in collision with pedestrian or animal	Ch. 20	27
V61	Occupant of heavy transport vehicle injured in collision with pedal cycle	Ch. 20	27
V62	Occupant of heavy transport vehicle injured in collision with two- or three-wheeled motor vehicle	Ch. 20	27
V63	Occupant of heavy transport vehicle injured in collision with car, pick-up truck or van	Ch. 20	27
V64	Occupant of heavy transport vehicle injured in collision with heavy transport vehicle or bus	Ch. 20	27
V65	Occupant of heavy transport vehicle injured in collision with railway train or railway vehicle	Ch. 20	27
V66	Occupant of heavy transport vehicle injured in collision with other nonmotor vehicle	Ch. 20	27
V67	Occupant of heavy transport vehicle injured in collision with fixed or stationary object	Ch. 20	27
V68	Occupant of heavy transport vehicle injured in noncollision transport accident	Ch. 20	27
V69	Occupant of heavy transport vehicle injured in other and unspecified transport accidents	Ch. 20	48
V70	Bus occupant injured in collision with pedestrian or animal	Ch. 20	27
V71	Bus occupant injured in collision with pedal cycle	Ch. 20	27
V72	Bus occupant injured in collision with two- or three-wheeled motor vehicle	Ch. 20	27
V73	Bus occupant injured in collision with car, pick-up truck or van	Ch. 20	27
V74	Bus occupant injured in collision with heavy transport vehicle or bus	Ch. 20	27
V75	Bus occupant injured in collision with railway train or railway vehicle	Ch. 20	27
V76	Bus occupant injured in collision with other nonmotor vehicle	Ch. 20	27
V77	Bus occupant injured in collision with fixed or stationary object	Ch. 20	27
V78	Bus occupant injured in noncollision transport accident	Ch. 20	27
V79	Bus occupant injured in other and unspecified transport accidents	Ch. 20	48
V80	Animal-rider or occupant of animal-drawn vehicle injured in transport accident	Ch. 20	93
V81	Occupant of railway train or railway vehicle injured in transport accident	Ch. 20	39
V82	Occupant of powered streetcar injured in transport accident	Ch. 20	30
V83	Occupant of special vehicle mainly used on industrial premises injured in transport accident	Ch. 20	27
V84	Occupant of special vehicle mainly used in agriculture injured in transport accident	Ch. 20	27
V85	Occupant of special construction vehicle injured in transport accident	Ch. 20	27
V86	Occupant of special all-terrain or other off-road motor vehicle, injured in transport accident	Ch. 20	189
V87	Traffic accident of specified type but victim's mode of transport unknown	Ch. 20	30
V88	Nontraffic accident of specified type but victim's mode of transport unknown	Ch. 20	30
V89	Motor- or nonmotor-vehicle accident, type of vehicle unspecified	Ch. 20	15
V90	Drowning and submersion due to accident to watercraft	Ch. 20	144
V91	Other injury due to accident to watercraft	Ch. 20	141
V92	Drowning and submersion due to accident on board watercraft, without accident to watercraft	Ch. 20	84
V93	Other injury due to accident on board watercraft, without accident to watercraft	Ch. 20	168
V94	Other and unspecified water transport accidents	Ch. 20	39
V95	Accident to powered aircraft causing injury to occupant	Ch. 20	111
V96	Accident to nonpowered aircraft causing injury to occupant	Ch. 20	69
V97	Other specified air transport accidents	Ch. 20	39
V98	Other specified transport accidents	Ch. 20	15
V99	Unspecified transport accident	Ch. 20	3
W00	Fall due to ice and snow	Ch. 20	12
W01	Fall on same level from slipping, tripping and stumbling	Ch. 20	24
W03	Other fall on same level due to collision with another person	Ch. 20	3
W04	Fall while being carried or supported by other persons	Ch. 20	3
W05	Fall from non-moving wheelchair, nonmotorized scooter and motorized mobility scooter	Ch. 20	9
W06	Fall from bed	Ch. 20	3
W07	Fall from chair	Ch. 20	3
W08	Fall from other furniture	Ch. 20	3
W09	Fall on and from playground equipment	Ch. 20	12
W10	Fall on and from stairs and steps	Ch. 20	15
W11	Fall on and from ladder	Ch. 20	3
W12	Fall on and from scaffolding	Ch. 20	3
W13	Fall from, out of or through building or structure	Ch. 20	21
W14	Fall from tree	Ch. 20	3
W15	Fall from cliff	Ch. 20	3
W16	Fall, jump or diving into water	Ch. 20	138
W17	Other fall from one level to another	Ch. 20	24
W18	Other slipping, tripping and stumbling and falls	Ch. 20	45
W19	Unspecified fall	Ch. 20	3
W20	Struck by thrown, projected or falling object	Ch. 20	9
W21	Striking against or struck by sports equipment	Ch. 20	72
W22	Striking against or struck by other objects	Ch. 20	33
W23	Caught, crushed, jammed or pinched in or between objects	Ch. 20	9
W24	Contact with lifting and transmission devices, not elsewhere classified	Ch. 20	6
W25	Contact with sharp glass	Ch. 20	3
W26	Contact with other sharp objects	Ch. 20	15
W27	Contact with nonpowered hand tool	Ch. 20	21
W28	Contact with powered lawn mower	Ch. 20	3
W29	Contact with other powered hand tools and household machinery	Ch. 20	18
W30	Contact with agricultural machinery	Ch. 20	21
W31	Contact with other and unspecified machinery	Ch. 20	27
W32	Accidental handgun discharge and malfunction	Ch. 20	6
W33	Accidental rifle, shotgun and larger firearm discharge and malfunction	Ch. 20	30
W34	Accidental discharge and malfunction from other and unspecified firearms and guns	Ch. 20	30
W35	Explosion and rupture of boiler	Ch. 20	3
W36	Explosion and rupture of gas cylinder	Ch. 20	15
W37	Explosion and rupture of pressurized tire, pipe or hose	Ch. 20	6
W38	Explosion and rupture of other specified pressurized devices	Ch. 20	3
W39	Discharge of firework	Ch. 20	3
W40	Explosion of other materials	Ch. 20	12
W42	Exposure to noise	Ch. 20	6
W44	Foreign body entering into or through a natural orifice	Ch. 20	126
W45	Foreign body or object entering through skin	Ch. 20	9
W46	Contact with hypodermic needle	Ch. 20	6
W49	Exposure to other inanimate mechanical forces	Ch. 20	18
W50	Accidental hit, strike, kick, twist, bite or scratch by another person	Ch. 20	15
W51	Accidental striking against or bumped into by another person	Ch. 20	3
W52	Crushed, pushed or stepped on by crowd or human stampede	Ch. 20	3
W53	Contact with rodent	Ch. 20	24
W54	Contact with dog	Ch. 20	9
W55	Contact with other mammals	Ch. 20	63
W56	Contact with nonvenomous marine animal	Ch. 20	63
W57	Bitten or stung by nonvenomous insect and other nonvenomous arthropods	Ch. 20	3
W58	Contact with crocodile or alligator	Ch. 20	24
W59	Contact with other nonvenomous reptiles	Ch. 20	42
W60	Contact with nonvenomous plant thorns and spines and sharp leaves	Ch. 20	3
W61	Contact with birds (domestic) (wild)	Ch. 20	72
W62	Contact with nonvenomous amphibians	Ch. 20	9
W64	Exposure to other animate mechanical forces	Ch. 20	3
W65	Accidental drowning and submersion while in bath-tub	Ch. 20	3
W67	Accidental drowning and submersion while in swimming-pool	Ch. 20	3
W69	Accidental drowning and submersion while in natural water	Ch. 20	3
W73	Other specified cause of accidental non-transport drowning and submersion	Ch. 20	3
W74	Unspecified cause of accidental drowning and submersion	Ch. 20	3
W85	Exposure to electric transmission lines	Ch. 20	3
W86	Exposure to other specified electric current	Ch. 20	9
W88	Exposure to ionizing radiation	Ch. 20	9
W89	Exposure to man-made visible and ultraviolet light	Ch. 20	12
W90	Exposure to other nonionizing radiation	Ch. 20	12
W92	Exposure to excessive heat of man-made origin	Ch. 20	3
W93	Exposure to excessive cold of man-made origin	Ch. 20	18
W94	Exposure to high and low air pressure and changes in air pressure	Ch. 20	30
W99	Exposure to other man-made environmental factors	Ch. 20	3
X00	Exposure to uncontrolled fire in building or structure	Ch. 20	21
X01	Exposure to uncontrolled fire, not in building or structure	Ch. 20	15
X02	Exposure to controlled fire in building or structure	Ch. 20	21
X03	Exposure to controlled fire, not in building or structure	Ch. 20	15
X04	Exposure to ignition of highly flammable material	Ch. 20	3
X05	Exposure to ignition or melting of nightwear	Ch. 20	3
X06	Exposure to ignition or melting of other clothing and apparel	Ch. 20	12
X08	Exposure to other specified smoke, fire and flames	Ch. 20	30
X10	Contact with hot drinks, food, fats and cooking oils	Ch. 20	9
X11	Contact with hot tap-water	Ch. 20	9
X12	Contact with other hot fluids	Ch. 20	3
X13	Contact with steam and other hot vapors	Ch. 20	6
X14	Contact with hot air and other hot gases	Ch. 20	6
X15	Contact with hot household appliances	Ch. 20	15
X16	Contact with hot heating appliances, radiators and pipes	Ch. 20	3
X17	Contact with hot engines, machinery and tools	Ch. 20	3
X18	Contact with other hot metals	Ch. 20	3
X19	Contact with other heat and hot substances	Ch. 20	3
X30	Exposure to excessive natural heat	Ch. 20	3
X31	Exposure to excessive natural cold	Ch. 20	3
X32	Exposure to sunlight	Ch. 20	3
X34	Earthquake	Ch. 20	3
X35	Volcanic eruption	Ch. 20	3
X36	Avalanche, landslide and other earth movements	Ch. 20	6
X37	Cataclysmic storm	Ch. 20	27
X38	Flood	Ch. 20	3
X39	Exposure to other forces of nature	Ch. 20	9
X50	Overexertion and strenuous or repetitive movements	Ch. 20	12
X52	Prolonged stay in weightless environment	Ch. 20	3
X58	Exposure to other specified factors	Ch. 20	3
X71	Intentional self-harm by drowning and submersion	Ch. 20	18
X72	Intentional self-harm by handgun discharge	Ch. 20	3
X73	Intentional self-harm by rifle, shotgun and larger firearm discharge	Ch. 20	15
X74	Intentional self-harm by other and unspecified firearm and gun discharge	Ch. 20	15
X75	Intentional self-harm by explosive material	Ch. 20	3
X76	Intentional self-harm by smoke, fire and flames	Ch. 20	3
X77	Intentional self-harm by steam, hot vapors and hot objects	Ch. 20	18
X78	Intentional self-harm by sharp object	Ch. 20	15
X79	Intentional self-harm by blunt object	Ch. 20	3
X80	Intentional self-harm by jumping from a high place	Ch. 20	3
X81	Intentional self-harm by jumping or lying in front of moving object	Ch. 20	9
X82	Intentional self-harm by crashing of motor vehicle	Ch. 20	12
X83	Intentional self-harm by other specified means	Ch. 20	12
X92	Assault by drowning and submersion	Ch. 20	18
X93	Assault by handgun discharge	Ch. 20	3
X94	Assault by rifle, shotgun and larger firearm discharge	Ch. 20	15
X95	Assault by other and unspecified firearm and gun discharge	Ch. 20	15
X96	Assault by explosive material	Ch. 20	21
X97	Assault by smoke, fire and flames	Ch. 20	3
X98	Assault by steam, hot vapors and hot objects	Ch. 20	18
X99	Assault by sharp object	Ch. 20	15
Y00	Assault by blunt object	Ch. 20	3
Y01	Assault by pushing from high place	Ch. 20	3
Y02	Assault by pushing or placing victim in front of moving object	Ch. 20	9
Y03	Assault by crashing of motor vehicle	Ch. 20	6
Y04	Assault by bodily force	Ch. 20	12
Y08	Assault by other specified means	Ch. 20	15
Y21	Drowning and submersion, undetermined intent	Ch. 20	21
Y22	Handgun discharge, undetermined intent	Ch. 20	3
Y23	Rifle, shotgun and larger firearm discharge, undetermined intent	Ch. 20	18
Y24	Other and unspecified firearm discharge, undetermined intent	Ch. 20	9
Y25	Contact with explosive material, undetermined intent	Ch. 20	3
Y26	Exposure to smoke, fire and flames, undetermined intent	Ch. 20	3
Y27	Contact with steam, hot vapors and hot objects, undetermined intent	Ch. 20	18
Y28	Contact with sharp object, undetermined intent	Ch. 20	15
Y29	Contact with blunt object, undetermined intent	Ch. 20	3
Y30	Falling, jumping or pushed from a high place, undetermined intent	Ch. 20	3
Y31	Falling, lying or running before or into moving object, undetermined intent	Ch. 20	3
Y32	Crashing of motor vehicle, undetermined intent	Ch. 20	3
Y33	Other specified events, undetermined intent	Ch. 20	3
Y35	Legal intervention	Ch. 20	276
Y36	Operations of war	Ch. 20	297
Y37	Military operations	Ch. 20	273
Y38	Terrorism	Ch. 20	96

Every code under these categories takes one of the values above in the seventh position, with X placeholders when the code is shorter than six characters. For example, a code under M97 ends in A for initial encounter. “Codes” counts the complete 7-character codes.

Other 7th Character Value Sets

Eye Laterality Closed Fracture Encounter Fetus Identification Glaucoma Stage Pathological Fracture Encounter Open or Closed Fracture Encounter Coma Scale Timing Skull, Spine and Pelvis Fracture Encounter Open Fracture Type Encounter Retinal Vein Occlusion Status Vertebral Fracture Encounter Dry Macular Degeneration Stage Wet Macular Degeneration Stage Chronic Gout Tophus

Questions About These 7th Characters

What do the 7th characters A, D, S mean?

In this set: A (initial encounter); D (subsequent encounter); S (sequela).

Which ICD-10-CM categories use the Encounter: Initial, Subsequent, Sequela 7th characters?

409 categories and subcategories use them in FY 2027, covering 31,412 codes. The table above lists each one with its chapter and code count.

What if the code is shorter than six characters?

Fill the empty positions with the placeholder X so the 7th character is in the seventh position. A code that requires a 7th character is invalid without it (Sections I.A.4 and I.A.5).

Related References

ICD-10-CM Official Guidelines ICD-10-CM Code Lookup ICD-10-CM Codes List Code Lists by Tag

Source: FY 2027 ICD-10-CM Tabular List (CMS and NCHS) and the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027, Section I.A. ICD List is not affiliated with CMS or NCHS.