2026 ICD-10-CM Diagnosis Code S00.07XAOther superficial bite of scalp, initial encounter

ICD-10-CM Codes›S00–T88›S00-S09›S00

ICD-10-CM S00.07XA
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S00.07XA is a billable ICD-10-CM diagnosis code for other superficial bite of scalp, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 604 through 605, 963 through 965. Coders also document this condition as superficial bite of scalp. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Superficial injury; contusion, initial encounter.

Code Identity

ICD-10-CM Code
S00.07XA
Billable Status
Yes — Valid for Submission
Code Describes
Other superficial bite of scalp, initial encounter
Short Description
Other superficial bite of scalp, initial encounter
Same as the full description in the CMS dataset.
Parent Code
S00.07
Other superficial bite of scalp

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS00-S09Injuries to the head
CategoryS00Superficial injury of head
This CodeS00.07XAOther superficial bite of scalp, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Superficial bite of scalp

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 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

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

CCSR INJ017
Superficial injury; contusion, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Animal Bites

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Read the full article at MedlinePlus

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

Convert S00.07XA to ICD-9-CMHistory

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

ICD-9-CM
910.8 Superfic inj head NEC
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S00.07XAOverview

Is S00.07XA (Other superficial bite of scalp) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other superficial bite of scalp, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in S00.07XA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for other superficial bite of scalp, such as an emergency visit or first evaluation.

What MS-DRG does S00.07XA group to?

When other superficial bite of scalp, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 604, 605, 963, 964, 965, with relative weights from 0.9160 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of S00.07XA?

Under the General Equivalence Mappings, other superficial bite of scalp, initial encounter converts to ICD-9-CM 910.8 (superfic inj head NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.