2026 ICD-10-CM Diagnosis Code S61.409AUnspecified open wound of unspecified hand, initial encounter

ICD-10-CM S61.409A

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

S61.409A is a billable ICD-10-CM diagnosis code for unspecified open wound of unspecified hand, 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Open wounds to limbs, initial encounter.

Code Identity

ICD-10-CM Code

S61.409A

Billable Status

Yes — Valid for Submission

Code Describes

Unspecified open wound of unspecified hand, initial encounter

Short Description

Unspecified open wound of unspecified hand, init encntr

Parent Code

S61.409

Unspecified open wound of unspecified hand

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 CodeS61.409AUnspecified open wound of unspecified hand, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

Filter synonyms:

Fracture of base of fifth metacarpal
Fracture of metacarpophalangeal joint
Fracture of multiple sites of metacarpus
Fracture of neck of fifth metacarpal
Injury of branch of median nerve
Injury of branch of ulnar nerve
Injury of cutaneous sensory nerve of upper limb
Injury of palmar artery
Multiple open dislocations of hand
Multiple open fractures of hand bones
Multiple open wounds of digital vessel of hand
Multiple open wounds of hand
Multiple open wounds of wrist
Multiple open wounds of wrist and hand
Open comminuted fracture of metacarpal bone
Open crush injury hand, dorsum
Open crush injury hand, palm
Open division finger ligament
Open division wrist and/or hand ligament
Open division, finger, metacarpophalangeal joint, radial collateral ligament
Open division, finger, metacarpophalangeal joint, ulnar collateral ligament
Open fracture dislocation multiple digits
Open fracture dislocation of digit of hand
Open fracture dislocation of metacarpophalangeal joint
Open fracture finger metacarpal neck
Open fracture of base of fifth metacarpal bone
Open fracture of base of fourth metacarpal bone
Open fracture of base of second metacarpal bone
Open fracture of base of third metacarpal bone
Open fracture of bone of wrist and/or hand
Open fracture of fifth metacarpal bone
Open fracture of fourth metacarpal bone
Open fracture of hand
Open fracture of multiple metacarpal bones
Open fracture of multiple sites of metacarpus
Open fracture of neck of fifth metacarpal bone
Open fracture of neck of fourth metacarpal bone
Open fracture of neck of second metacarpal bone
Open fracture of neck of third metacarpal bone
Open fracture of second metacarpal bone
Open fracture of shaft of fifth metacarpal bone
Open fracture of shaft of fourth metacarpal bone
Open fracture of shaft of metacarpal bone
Open fracture of shaft of second metacarpal bone
Open fracture of shaft of third metacarpal bone
Open fracture of third metacarpal bone
Open fracture subluxation of metacarpophalangeal joint
Open fracture thumb metacarpal shaft
Open fracture-dislocation of multiple digits of hand
Open injury, common digital nerve
Open injury, digital nerve, multiple
Open injury, median nerve, palmar sensory branch
Open injury, palmar artery
Open injury, ulnar nerve, deep motor
Open injury, ulnar nerve, dorsal sensory
Open traumatic dislocation metacarpophalangeal joint
Open traumatic dislocation multiple digits
Open traumatic subluxation, metacarpophalangeal joint
Open wound of hand
Open wound of hand, dorsum
Open wound of hand, excluding finger
Open wound of hand, palm
Pellet wound of hand
Pellet wound of palm of hand
Traumatic division of finger ligament

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 INJ012

Open wounds to limbs, initial encounter

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.
Open Fracture of Shaft of Metacarpal Bone
a traumatic break in the diaphysis of the metacarpal bone 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 S61.409A to ICD-9-CMHistory

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

ICD-9-CM

882.0 Open wound of hand

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 S61.409AOverview

Is S61.409A (Unspecified open wound of unspecified hand) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified open wound of unspecified hand, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in S61.409A mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for unspecified open wound of unspecified hand, such as an emergency visit or first evaluation.

What MS-DRG does S61.409A group to?

When unspecified open wound of unspecified hand, 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 S61.409A?

Under the General Equivalence Mappings, unspecified open wound of unspecified hand, initial encounter converts to ICD-9-CM 882.0 (open wound of hand). 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