2026 ICD-10-CM Diagnosis Code S61.002SUnspecified open wound of left thumb without damage to nail, sequela

ICD-10-CM Codes›S00–T88›S60-S69›S61

ICD-10-CM S61.002S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S61.002S is a billable ICD-10-CM diagnosis code for unspecified open wound of left thumb without damage to nail, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. 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. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.

Code Identity

ICD-10-CM Code
S61.002S
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified open wound of left thumb without damage to nail, sequela
Short Description
Unsp open wound of left thumb w/o damage to nail, sequela
Parent Code
S61.002
Unspecified open wound of left thumb without damage to nail

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS60-S69Injuries to the wrist, hand and fingers
CategoryS61Open wound of wrist, hand and fingers
This CodeS61.002SUnspecified open wound of left thumb without damage to nail, sequela

Present on Admission (POA)Billing

S61.002S 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.

  • Fracture of distal phalanx of left thumb
  • Fracture of first metacarpal bone of left hand
  • Fracture of phalanx of left thumb
  • Fracture of proximal phalanx of left thumb
  • Open dislocation of metacarpophalangeal joint of thumb
  • Open fracture of base of first metacarpal bone of left hand
  • Open fracture of base of thumb
  • Open fracture of distal phalanx of left thumb
  • Open fracture of distal phalanx of thumb
  • Open fracture of first metacarpal bone of left hand
  • Open fracture of phalanx of left thumb
  • Open fracture of proximal phalanx of left thumb
  • Open fracture of proximal phalanx of thumb
  • Open fracture of shaft of metacarpal bone of left hand
  • Open fracture of shaft of metacarpus of left thumb
  • Open fracture thumb metacarpal shaft
  • Open traumatic dislocation metacarpophalangeal joint
  • Open traumatic dislocation of interphalangeal joint of left thumb
  • Open traumatic dislocation of joint of left thumb
  • Open traumatic dislocation of metacarpophalangeal joint of left thumb
  • Open traumatic dislocation, interphalangeal joint,thumb
  • Open wound of left thumb
  • Traumatic dislocation of metacarpophalangeal joint of thumb

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Open wound of wrist, hand and fingers (S61). 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 INJ073
Injury, sequela
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 S61.002S to ICD-9-CMHistory

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

ICD-9-CM
906.1 Late eff open wnd extrem
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 S61.002SOverview

Is S61.002S (Unspecified open wound of left thumb without damage to nail) a billable code?

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

What does the 7th character S in S61.002S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the unspecified open wound of left thumb without damage to nail itself has resolved, not the original event.

What MS-DRG does S61.002S group to?

When unspecified open wound of left thumb without damage to nail, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 604, 605, with relative weights from 0.9160 to 1.4721 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S61.002S 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 left thumb without damage to nail, sequela on inpatient claims.

What is the ICD-9 equivalent of S61.002S?

Under the General Equivalence Mappings, unspecified open wound of left thumb without damage to nail, sequela converts to ICD-9-CM 906.1 (late eff open wnd extrem). 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.