2027 ICD-10-CM Diagnosis Code S00.90XDUnspecified superficial injury of unspecified part of head, subsequent encounter

ICD-10-CM Codes›S00–T88›S00-S09›S00

ICD-10-CM S00.90XD
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S00.90XD is a billable ICD-10-CM diagnosis code for unspecified superficial injury of unspecified part of head, subsequent encounter. The 7th character D marks it as a subsequent encounter code, used during routine care in the healing or recovery phase. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 949 through 950. The code is exempt from POA reporting. Coders also document this condition as head and neck superficial nerve injury. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Superficial injury; contusion, subsequent encounter.

Code Identity

ICD-10-CM Code
S00.90XD
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified superficial injury of unspecified part of head, subsequent encounter
Short Description
Unsp superficial injury of unsp part of head, subs encntr
Parent Code
S00.90
Unspecified superficial injury of unspecified part of head

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS00-S09Injuries to the head
CategoryS00Superficial injury of head
This CodeS00.90XDUnspecified superficial injury of unspecified part of head, subsequent encounter

Present on Admission (POA)Billing

S00.90XD is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Injuries to the head (S00-S09).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Head and neck superficial nerve injury
  • Injury of superficial nerves of head AND/OR neck
  • Multiple superficial injuries of head
  • Superficial injury of head
  • Superficial injury of head and neck
  • Superficial injury to head, excluding eye

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Superficial injury of head (S00). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to S00.90XD: its own notes plus those printed at S00, block S00-S09, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block S00-S09 Injuries to the head applies to 1,934 codes
  • injuries of ear
  • injuries of eye
  • injuries of face [any part]
  • injuries of gum
  • injuries of jaw
  • injuries of oral cavity
  • injuries of palate
  • injuries of periocular area
  • injuries of scalp
  • injuries of temporomandibular joint area
  • injuries of tongue
  • injuries of tooth

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From S00 Superficial injury of head applies to 288 codes
  • diffuse cerebral contusion (S06.2-)
  • focal cerebral contusion (S06.3-)
  • injury of eye and orbit (S05.-)
  • open wound of head (S01.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block S00-S09 Injuries to the head applies to 1,934 codes
  • burns and corrosions (T20-T32)
  • effects of foreign body in ear (T16)
  • effects of foreign body in larynx (T17.3)
  • effects of foreign body in mouth NOS (T18.0)
  • effects of foreign body in nose (T17.0-T17.1)
  • effects of foreign body in pharynx (T17.2)
  • effects of foreign body on external eye (T15.-)
  • frostbite (T33-T34)
  • insect bite or sting, venomous (T63.4)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From Block S00-S09 Injuries to the head applies to 1,934 codes
  • for any associated infection

Notes

General instructions on how these codes are used.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From S00 Superficial injury of head applies to 288 codes
  • The appropriate 7th character is to be added to each code from category S00
Values for category S00 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter this code
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ054
Superficial injury; contusion, subsequent encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Wounds and Injuries

An injury is damage to your body. It is a general term that refers to harm caused by accidents, falls, hits, weapons, and more. In the U.S., millions of people injure themselves every year. These injuries range from minor to life-threatening.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert S00.90XD to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V58.89 Other specfied aftercare
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About S00.90XDOverview

Is S00.90XD (Unspecified superficial injury of unspecified part of head) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified superficial injury of unspecified part of head, subsequent encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character D in S00.90XD mean?

The final character D marks a subsequent encounter: use it for routine care while the unspecified superficial injury of unspecified part of head is healing, after active treatment has ended.

What MS-DRG does S00.90XD group to?

When unspecified superficial injury of unspecified part of head, subsequent encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 950, 949, with relative weights from 0.7661 to 1.1231 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S00.90XD exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for unspecified superficial injury of unspecified part of head, subsequent encounter on inpatient claims. The code appears in the Injuries to the head (S00-S09) range of the CMS exempt list.

Can S00.90XD be reported with a code from S06.2?

Not as a rule. The Excludes1 note at S00, which applies to S00.90XD, lists "diffuse cerebral contusion (S06.2-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).