2026 ICD-10-CM Diagnosis Code M20.61Acquired deformities of toe(s), unspecified, right foot

ICD-10-CM Codes›M00–M99›M20-M25›M20

ICD-10-CM M20.61
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M20.61 is a billable ICD-10-CM diagnosis code for acquired deformities of toe(s), unspecified, right foot. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 564 through 566. Coders also document this condition as acquired deformity of toe of right foot. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acquired foot deformities.

Code Identity

ICD-10-CM Code
M20.61
Billable Status
Yes — Valid for Submission
Code Describes
Acquired deformities of toe(s), unspecified, right foot
Short Description
Acquired deformities of toe(s), unspecified, right foot
Same as the full description in the CMS dataset.
Parent Code
M20.6
Acquired deformities of toe(s), unspecified

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM20-M25Other joint disorders
CategoryM20Acquired deformities of fingers and toes
This CodeM20.61Acquired deformities of toe(s), unspecified, right foot

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired deformity of toe of right foot
  • Bilateral acquired deformity of toe of feet

Clinical ClassificationClinical

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

CCSR MUS021
Acquired foot deformities
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 M20.61 to ICD-9-CMHistory

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

ICD-9-CM
735.9 Acq deformity of toe NOS
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 M20.61Overview

Is M20.61 (Acquired deformities of toe(s), unspecified) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acquired deformities of toe(s), unspecified, right foot on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M20.61 group to?

When acquired deformities of toe(s), unspecified, right foot is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 565, 566, with relative weights from 0.7493 to 1.5436 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M20.61?

Under the General Equivalence Mappings, acquired deformities of toe(s), unspecified, right foot converts to ICD-9-CM 735.9 (acq deformity of toe NOS). 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.