2026 ICD-10-CM Diagnosis Code S61.009SUnspecified open wound of unspecified thumb without damage to nail, sequela

ICD-10-CM S61.009S

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

S61.009S is a billable ICD-10-CM diagnosis code for unspecified open wound of unspecified 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

S61.009S

Billable Status

Yes — Valid for Submission

Code Describes

Unspecified open wound of unspecified thumb without damage to nail, sequela

Short Description

Unsp open wound of unsp thumb w/o damage to nail, sequela

Parent Code

S61.009

Unspecified open wound of unspecified 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 CodeS61.009SUnspecified open wound of unspecified thumb without damage to nail, sequela

Present on Admission (POA)Billing

S61.009S 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.

Filter synonyms:

Acquired deformity of the thumb
Bennett's fracture
Crush injury of thumb
Fracture dislocation of carpometacarpal joint
Fracture dislocation of thumb
Fracture subluxation of thumb
Glass in hand
Glass in thumb
Mallet thumb with open tendon injury
Open Bennett's fracture
Open crush injury, thumb
Open dislocation of metacarpophalangeal joint of thumb
Open dislocation of thumb
Open division thumb ligament
Open division, thumb, interphalangeal joint, radial collateral ligament
Open division, thumb, interphalangeal joint, ulnar collateral ligament
Open division, thumb, metacarpophalangeal joint, radial collateral ligament
Open division, thumb, metacarpophalangeal joint, ulnar collateral ligament
Open fracture dislocation carpometacarpal joint
Open fracture dislocation of digit of hand
Open fracture dislocation of interphalangeal joint of thumb
Open fracture finger metacarpal head
Open fracture of base of thumb
Open fracture of distal phalanx of thumb
Open fracture of phalanx of thumb
Open fracture of proximal phalanx of thumb
Open fracture of thumb metacarpal
Open fracture subluxation digit
Open fracture subluxation of carpometacarpal joint
Open fracture subluxation of interphalangeal joint of thumb
Open fracture subluxation of wrist
Open fracture thumb distal phalanx, base
Open fracture thumb distal phalanx, mallet
Open fracture thumb distal phalanx, shaft
Open fracture thumb distal phalanx, tuft
Open fracture thumb metacarpal head
Open fracture thumb metacarpal neck
Open fracture thumb proximal phalanx, base
Open fracture thumb proximal phalanx, head
Open fracture thumb proximal phalanx, neck
Open fracture thumb proximal phalanx, shaft
Open traumatic dislocation carpometacarpal joint
Open traumatic dislocation metacarpophalangeal joint
Open traumatic dislocation, interphalangeal joint,thumb
Open traumatic subluxation carpometacarpal joint
Open traumatic subluxation digit
Open traumatic subluxation, interphalangeal joint thumb
Open wound of thumb
Pellet wound of hand
Pellet wound of thumb
Rupture of extensor tendon of thumb
Rupture of tendon of thumb
Traumatic amputation thumb tip, type 1
Traumatic amputation, thumb tip
Traumatic dislocation of carpometacarpal joint of thumb
Traumatic dislocation of metacarpophalangeal joint of thumb
Traumatic division of thumb ligament
Traumatic tear of tendon of hand

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

Clinical InformationClinical

Open Fracture of Neck of Metacarpal Bone
a traumatic break in the area of the metacarpal bone located between the diaphysis and the distal metaphysis that involves a break in the adjacent skin.

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 S61.009S 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 S61.009SOverview

Is S61.009S a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified open wound of unspecified 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 S61.009S mean?

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

What MS-DRG does S61.009S group to?

When unspecified open wound of unspecified 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 S61.009S 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 thumb without damage to nail, sequela on inpatient claims.

What is the ICD-9 equivalent of S61.009S?

Under the General Equivalence Mappings, unspecified open wound of unspecified 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.

Indicator	Meaning	CMS pays CC/MCC DRG
Y	Diagnosis was present at the time of inpatient admission	Yes
N	Diagnosis was not present at the time of admission	No
U	Documentation is insufficient to determine	No
W	Clinically undetermined	Yes
1	Unreported, exempt from POA reporting	No