2026 ICD-10-CM Diagnosis Code S91.103DUnspecified open wound of unspecified great toe without damage to nail, subsequent encounter

ICD-10-CM Codes›S00–T88›S90-S99›S91

ICD-10-CM S91.103D
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S91.103D is a billable ICD-10-CM diagnosis code for unspecified open wound of unspecified great toe without damage to nail, 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 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 949 through 950. The code is exempt from POA reporting. Coders also document this condition as open fracture distal phalanx, toe. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Open wounds to limbs, subsequent encounter.

Code Identity

ICD-10-CM Code
S91.103D
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified open wound of unspecified great toe without damage to nail, subsequent encounter
Short Description
Unsp open wound of unsp great toe w/o damage to nail, subs
Parent Code
S91.103
Unspecified open wound of unspecified great toe without damage to nail

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS90-S99Injuries to the ankle and foot
CategoryS91Open wound of ankle, foot and toes
This CodeS91.103DUnspecified open wound of unspecified great toe without damage to nail, subsequent encounter

Present on Admission (POA)Billing

S91.103D is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Open fracture distal phalanx, toe
  • Open fracture of distal phalanx of great toe
  • Open fracture of great toe
  • Open fracture of proximal phalanx of great toe
  • Open fracture proximal phalanx, toe

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Open wound of ankle, foot and toes (S91). 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 INJ049
Open wounds to limbs, subsequent encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Toe Injuries and Disorders

Fourteen of the 26 bones in your feet are in your toes. The toes, particularly your big toe, help you move and keep your balance. Playing sports, running, stubbing your toe, and dropping something on your foot can damage your toes. Wearing shoes that are too loose or too tight can also cause toe problems.

Read the full article at MedlinePlus

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

Convert S91.103D 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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S91.103DOverview

Is S91.103D a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified open wound of unspecified great toe without damage to nail, subsequent encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character D in S91.103D mean?

The final character D marks a subsequent encounter: use it for routine care while the unspecified open wound of unspecified great toe without damage to nail is healing, after active treatment has ended.

What MS-DRG does S91.103D group to?

When unspecified open wound of unspecified great toe without damage to nail, subsequent encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 949, 950, with relative weights from 0.6277 to 1.1897 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S91.103D 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 open wound of unspecified great toe without damage to nail, subsequent encounter on inpatient claims.

What is the ICD-9 equivalent of S91.103D?

Under the General Equivalence Mappings, unspecified open wound of unspecified great toe without damage to nail, subsequent encounter converts to ICD-9-CM V58.89 (other specfied aftercare). 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.