ICD-10-CM Excludes2 Notes · Chapter 1 · FY 2027 A00-B99
Excludes2 Notes in Chapter 1: Certain infectious and parasitic diseases ICD-10-CM
An Excludes2 note means "NOT INCLUDED HERE": the excluded condition is not part of this code, but a patient may have both, so both codes may be reported. In Chapter 1 (A00-B99), notes printed in the chapter name other codes 90 times, and Excludes2 Notes anywhere in the Tabular List name the chapter’s codes 121 times, covering 79 distinct codes, categories and ranges. Switch views to read the list either way.
✓ From the official FY 2027 ICD-10-CM Tabular ListDefinitions follow the Official Guidelines, Section I.A
90
References in Its Notes
121
References to Its Codes
79
Chapter Codes Named
A00-B99
Chapter 1
Chapter 1
Excludes2 Notes by the code that carries the note
41 of 41 shown
- A17.1 Meningeal tuberculoma
- tuberculoma of brain and spinal cord (A17.81)
- A18.2 Tuberculous peripheral lymphadenopathy
- A18.4 Tuberculosis of skin and subcutaneous tissue
- lupus vulgaris of eyelid (A18.4)
- A18.6 Tuberculosis of (inner) (middle) ear
- A36.3 Cutaneous diphtheria
- erythrasma (L08.1)
- streptococcal sore throat (J02.0)
- sepsis (due to) (in) actinomycotic (A42.7)
- sepsis (due to) (in) anthrax (A22.7)
- sepsis (due to) (in) candidal (B37.7)
- sepsis (due to) (in) Erysipelothrix (A26.7)
- sepsis (due to) (in) extraintestinal yersiniosis (A28.2)
- sepsis (due to) (in) gonococcal (A54.86)
- sepsis (due to) (in) herpesviral (B00.7)
- sepsis (due to) (in) listerial (A32.7)
- sepsis (due to) (in) melioidosis (A24.1)
- sepsis (due to) (in) meningococcal (A39.2-A39.4)
- sepsis (due to) (in) plague (A20.7)
- sepsis (due to) (in) tularemia (A21.7)
- toxic shock syndrome (A48.3)
- chlamydial infection NOS (A74.9)
- Block note Block A50-A64 Infections with a predominantly sexual mode of transmission applies to 142 codes
- human immunodeficiency virus [HIV] disease (B20)
- A54.42 Gonococcal arthritis
- gonococcal infection of spine (A54.41)
- A54.43 Gonococcal osteomyelitis
- gonococcal infection of spine (A54.41)
- intestinal trichomoniasis (A07.8)
- Lyme disease (A69.2-)
- chlamydial pneumonia (J16.0)
- monkeypox (B04)
- B37.2 Candidiasis of skin and nail
- diaper dermatitis (L22)
- pulmonary mycetoma (J4B)
- B70.0 Diphyllobothriasis
- larval diphyllobothriasis (B70.1)
- B81.1 Intestinal capillariasis
- hepatic capillariasis (B83.8)
- intestinal capillariasis (B81.1)
- B83.2 Angiostrongyliasis due to Parastrongylus cantonensis
- intestinal angiostrongyliasis (B81.3)
- B83.4 Internal hirudiniasis
- external hirudiniasis (B88.3)
- scabies (B86)
- B88.3 External hirudiniasis
- internal hirudiniasis (B83.4)
- B90.8 Sequelae of tuberculosis of other organs
- sequelae of respiratory tuberculosis (B90.9)
- B94.9 Sequelae of unspecified infectious and parasitic disease
- post COVID-19 condition (U09.9)
- Block P35-P39 Infections specific to the perinatal period: intestinal infectious disease (A00-A09)
- P37 Other congenital infectious and parasitic diseases: infectious neonatal diarrhea (A00-A09)
- Chapter 6 (G00-G99) Diseases of the nervous system: certain infectious and parasitic diseases (A00-B99)
- Chapter 7 (H00-H59) Diseases of the eye and adnexa: certain infectious and parasitic diseases (A00-B99)
- Chapter 8 (H60-H95) Diseases of the ear and mastoid process: certain infectious and parasitic diseases (A00-B99)
- Chapter 9 (I00-I99) Diseases of the circulatory system: certain infectious and parasitic diseases (A00-B99)
- Chapter 10 (J00-J99) Diseases of the respiratory system: certain infectious and parasitic diseases (A00-B99)
- Chapter 11 (K00-K95) Diseases of the digestive system: certain infectious and parasitic diseases (A00-B99)
- Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue: certain infectious and parasitic diseases (A00-B99)
- L97 Non-pressure chronic ulcer of lower limb, not elsewhere classified: specific infections classified to A00-B99
- L98.4 Non-pressure chronic ulcer of skin, not elsewhere classified: specific infections classified to A00-B99
- L98.A Non-pressure chronic ulcer of upper limb, not elsewhere classified: specific infections classified to A00-B99
- Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue: certain infectious and parasitic diseases (A00-B99)
- Chapter 14 (N00-N99) Diseases of the genitourinary system: certain infectious and parasitic diseases (A00-B99)
- Block P35-P39 Infections specific to the perinatal period: infectious diseases not specific to the perinatal period (A00-B99, J09, J10.-)
- K55.3 Necrotizing enterocolitis: necrotizing enterocolitis due to Clostridium difficile (A04.7-)
- A07.8 Other specified protozoal intestinal diseases
- A59 Trichomoniasis: intestinal trichomoniasis (A07.8)
- A15.4 Tuberculosis of intrathoracic lymph nodes
- A31 Infection due to other mycobacteria: tuberculosis (A15-A19)
- A17.81 Tuberculoma of brain and spinal cord
- A17.1 Meningeal tuberculoma: tuberculoma of brain and spinal cord (A17.81)
- A18.03 Tuberculosis of other bones
- A18.6 Tuberculosis of (inner) (middle) ear: tuberculous mastoiditis (A18.03)
- A18.39 Retroperitoneal tuberculosis
- A18.2 Tuberculous peripheral lymphadenopathy: tuberculosis of mesenteric and retroperitoneal lymph nodes (A18.39)
- A18.4 Tuberculosis of skin and subcutaneous tissue
- A20.7 Septicemic plague
- A41 Other sepsis: sepsis (due to) (in) plague (A20.7)
- A21.7 Generalized tularemia
- A41 Other sepsis: sepsis (due to) (in) tularemia (A21.7)
- A22.7 Anthrax sepsis
- A41 Other sepsis: sepsis (due to) (in) anthrax (A22.7)
- A24.1 Acute and fulminating melioidosis
- A41 Other sepsis: sepsis (due to) (in) melioidosis (A24.1)
- A26.7 Erysipelothrix sepsis
- A41 Other sepsis: sepsis (due to) (in) Erysipelothrix (A26.7)
- Block A65-A69 Other spirochetal diseases: leptospirosis (A27.-)
- A28.2 Extraintestinal yersiniosis
- A41 Other sepsis: sepsis (due to) (in) extraintestinal yersiniosis (A28.2)
- A31 Infection due to other mycobacteria: leprosy (A30.-)
- A32.7 Listerial sepsis
- A41 Other sepsis: sepsis (due to) (in) listerial (A32.7)
- A33 Tetanus neonatorum
- Chapter 16 (P00-P96) Certain conditions originating in the perinatal period: tetanus neonatorum (A33)
- Block P35-P39 Infections specific to the perinatal period: tetanus neonatorum (A33)
- P37 Other congenital infectious and parasitic diseases: tetanus neonatorum (A33)
- A34 Obstetrical tetanus
- Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium: obstetrical tetanus (A34)
- Block O85-O92 Complications predominantly related to the puerperium: obstetrical tetanus (A34)
- O86 Other puerperal infections: obstetrical tetanus (A34)
- O98 Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium: obstetrical tetanus (A34)
- J02.0 Streptococcal pharyngitis: scarlet fever (A38.-)
- A41 Other sepsis: sepsis (due to) (in) meningococcal (A39.2-A39.4)
- A42.7 Actinomycotic sepsis
- A41 Other sepsis: sepsis (due to) (in) actinomycotic (A42.7)
- A48.3 Toxic shock syndrome
- A41 Other sepsis: toxic shock syndrome (A48.3)
- A48.51 Infant botulism
- Block P35-P39 Infections specific to the perinatal period: infant botulism (A48.51)
- A50.01 Early congenital syphilitic oculopathy
- Chapter 7 (H00-H59) Diseases of the eye and adnexa: syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
- Chapter 7 (H00-H59) Diseases of the eye and adnexa: syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
- Block P35-P39 Infections specific to the perinatal period: congenital syphilis (A50.-)
- P37 Other congenital infectious and parasitic diseases: congenital syphilis (A50.-)
- Block A65-A69 Other spirochetal diseases: syphilis (A50-A53)
- N34 Urethritis and urethral syndrome: urethritis in diseases with a predominantly sexual mode of transmission (A50-A64)
- A51.43 Secondary syphilitic oculopathy
- Chapter 7 (H00-H59) Diseases of the eye and adnexa: syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
- A52.71 Late syphilitic oculopathy
- Chapter 7 (H00-H59) Diseases of the eye and adnexa: syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
- A54.31 Gonococcal conjunctivitis
- P37 Other congenital infectious and parasitic diseases: ophthalmia neonatorum due to gonococcus (A54.31)
- A54.41 Gonococcal spondylopathy
- A54.86 Gonococcal sepsis
- A41 Other sepsis: sepsis (due to) (in) gonococcal (A54.86)
- Block P35-P39 Infections specific to the perinatal period: congenital gonococcal infection (A54.-)
- A55 Chlamydial lymphogranuloma (venereum)
- A56 Other sexually transmitted chlamydial diseases: chlamydial lymphogranuloma (A55)
- B00 Herpesviral [herpes simplex] infections: anogenital herpesviral infection (A60.-)
- A63.0 Anogenital (venereal) warts
- B07 Viral warts: anogenital (venereal) warts (A63.0)
- A68 Relapsing fevers: Lyme disease (A69.2-)
- A74.9 Chlamydial infection, unspecified
- A49 Bacterial infection of unspecified site: chlamydial infection NOS (A74.9)
- A56 Other sexually transmitted chlamydial diseases: conditions classified to A74.-
- A92.2 Venezuelan equine fever
- A83 Mosquito-borne viral encephalitis: Venezuelan equine encephalitis (A92.2)
- B00.4 Herpesviral encephalitis
- B10.0 Other human herpesvirus encephalitis: herpes encephalitis NOS (B00.4)
- B10.0 Other human herpesvirus encephalitis: herpes simplex encephalitis (B00.4)
- B10.0 Other human herpesvirus encephalitis: human herpesvirus encephalitis (B00.4)
- B10.0 Other human herpesvirus encephalitis: simian B herpes virus encephalitis (B00.4)
- B00.7 Disseminated herpesviral disease
- A41 Other sepsis: sepsis (due to) (in) herpesviral (B00.7)
- B00.81 Herpesviral hepatitis
- Block B15-B19 Viral hepatitis: herpesviral [herpes simplex] hepatitis (B00.81)
- B00.9 Herpesviral infection, unspecified
- B10 Other human herpesviruses: herpes NOS (B00.9)
- B10 Other human herpesviruses: herpes zoster (B02.-)
- B10 Other human herpesviruses: human herpesvirus 3 (B01.-, B02.-)
- B10 Other human herpesviruses: zoster (B02.-)
- Block L00-L08 Infections of the skin and subcutaneous tissue: zoster (B02.-)
- B04 Monkeypox
- B08.0 Other orthopoxvirus infections: monkeypox (B04)
- Block L00-L08 Infections of the skin and subcutaneous tissue: viral warts (B07.-)
- Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue: viral warts (B07.-)
- B08.1 Molluscum contagiosum
- A63 Other predominantly sexually transmitted diseases, not elsewhere classified: molluscum contagiosum (B08.1)
- B08.5 Enteroviral vesicular pharyngitis
- B00 Herpesviral [herpes simplex] infections: herpangina (B08.5)
- Block K70-K77 Diseases of liver: viral hepatitis (B15-B19)
- K72 Hepatic failure, not elsewhere classified: viral hepatitis with hepatic coma (B15-B19)
- T80.6 Other serum reactions: serum hepatitis (B16-B19)
- B17.9 Acute viral hepatitis, unspecified
- K75.0 Abscess of liver: acute or subacute hepatitis NOS (B17.9)
- Z22 Carrier of infectious disease: carrier of viral hepatitis (B18.-)
- B20 Human immunodeficiency virus [HIV] disease
- Block A50-A64 Infections with a predominantly sexual mode of transmission: human immunodeficiency virus [HIV] disease (B20)
- Chapter 3 (D50-D89) Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism: human immunodeficiency virus [HIV] disease (B20)
- Block D80-D89 Certain disorders involving the immune mechanism: human immunodeficiency virus [HIV] disease (B20)
- Block P35-P39 Infections specific to the perinatal period: human immunodeficiency virus [HIV] disease (B20)
- B25.1 Cytomegaloviral hepatitis
- Block B15-B19 Viral hepatitis: cytomegaloviral hepatitis (B25.1)
- B25.9 Cytomegaloviral disease, unspecified
- B10 Other human herpesviruses: cytomegalovirus (B25.9)
- B10 Other human herpesviruses: human herpesvirus 5 (B25.-)
- B37.0 Candidal stomatitis
- Block L00-L08 Infections of the skin and subcutaneous tissue: Perlèche due to candidiasis (B37.0)
- B37.7 Candidal sepsis
- A41 Other sepsis: sepsis (due to) (in) candidal (B37.7)
- J82 Pulmonary eosinophilia, not elsewhere classified: pulmonary eosinophilia due to aspergillosis (B44.-)
- J82 Pulmonary eosinophilia, not elsewhere classified: pulmonary eosinophilia due to specified parasitic infection (B50-B83)
- A06 Amebiasis: acanthamebiasis (B60.1-)
- B60.2 Naegleriasis
- A06 Amebiasis: Naegleriasis (B60.2)
- B70.1 Sparganosis
- B70.0 Diphyllobothriasis: larval diphyllobothriasis (B70.1)
- B74 Filariasis: onchocerciasis (B73)
- B81.1 Intestinal capillariasis
- B83 Other helminthiases: intestinal capillariasis (B81.1)
- B81.3 Intestinal angiostrongyliasis
- B83.2 Angiostrongyliasis due to Parastrongylus cantonensis: intestinal angiostrongyliasis (B81.3)
- B83.4 Internal hirudiniasis
- B88.3 External hirudiniasis: internal hirudiniasis (B83.4)
- B83.8 Other specified helminthiases
- B81.1 Intestinal capillariasis: hepatic capillariasis (B83.8)
- B86 Scabies
- B88.0 Other acariasis: scabies (B86)
- B88.3 External hirudiniasis
- B83.4 Internal hirudiniasis: external hirudiniasis (B88.3)
- B90.9 Sequelae of respiratory and unspecified tuberculosis
- B90.8 Sequelae of tuberculosis of other organs: sequelae of respiratory tuberculosis (B90.9)
- B95.62 Methicillin resistant Staphylococcus aureus infection as the cause of diseases classified elsewhere
- Z16.12 Extended spectrum beta lactamase (ESBL) resistance: Methicillin resistant Staphylococcus aureus infection in diseases classified elsewhere (B95.62)
- U07.1 COVID-19: coronavirus as the cause of diseases classified elsewhere (B97.2-)
The first view lists notes printed in this chapter (a note on a category or block applies to every code beneath it). The second lists codes of this chapter named by Excludes2 Notes anywhere in the Tabular List, including notes in other chapters.
Questions About Excludes2 Notes
What does an Excludes2 note mean?
An Excludes2 note means “Not included here”: the excluded condition is not part of the condition represented by the code, but a patient may have both conditions at the same time (Section I.A.12.b). The FY 2027 Tabular List has 2,529 of them; 2,493 name other codes, with 2,799 references to 1,779 distinct codes, categories and ranges.
Can both codes be reported when there is an Excludes2 note?
Yes. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate: that is, when the patient has both conditions and both are documented.
Related References
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.
