2027 ICD-10-CM Diagnosis Code M67.461Ganglion, right knee

ICD-10-CM Codes›M00–M99›M65-M67›M67

ICD-10-CM M67.461
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M67.461 is a billable ICD-10-CM diagnosis code for ganglion, right knee. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 557 through 558. Coders also document this condition as bilateral ganglion cyst of knees. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Tendon and synovial disorders.

Code Identity

ICD-10-CM Code
M67.461
Billable Status
Yes — Valid for Submission
Code Describes
Ganglion, right knee
Short Description
Ganglion, right knee
Same as the full description in the CMS dataset.
Parent Code
M67.46
Ganglion, knee

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM65-M67Disorders of synovium and tendon
CategoryM67Other disorders of synovium and tendon
This CodeM67.461Ganglion, right knee

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral ganglion cyst of knees
  • Ganglion cyst of left knee
  • Ganglion cyst of right knee
  • Ganglion of knee

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M67.461: its own notes plus those printed at M67.4, M67, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From M67.4 Ganglion applies to 24 codes
From M67 Other disorders of synovium and tendon applies to 143 codes
  • palmar fascial fibromatosis [Dupuytren] (M72.0)
  • tendinitis NOS (M77.9-)
  • xanthomatosis localized to tendons (E78.2)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From M67.4 Ganglion applies to 24 codes
From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Notes

General instructions on how these codes are used.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name M67.461, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming M67.461: its condition is not part of those codes, and both may be reported when the patient has both.

  • M24 Other specific joint derangements
    ganglion (M67.4) names M67.4, which includes this code

Clinical ClassificationClinical

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

CCSR MUS009
Tendon and synovial disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Ganglion Cysts

    nodular tumor-like lesions or mucoid flesh, arising from tendon sheaths, ligaments, or joint capsule, especially of the hands, wrists, or feet. they are not true cysts as they lack epithelial wall. they are distinguished from synovial cysts by the lack of communication with a joint cavity or the synovial membrane.

Patient EducationClinical

Connective Tissue Disorders

Your connective tissue supports many different parts of your body, such as your skin, eyes, and heart. It is like a "cellular glue" that gives your body parts their shape and helps keep them strong. It also helps some of your tissues do their work. It is made of many kinds of proteins. Cartilage and fat are types of connective tissue.

Read the full article at MedlinePlus

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

Convert M67.461 to ICD-9-CMHistory

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

ICD-9-CM
727.41 Ganglion of joint
Approximate The match is approximate rather than exact.
ICD-9-CM
727.42 Ganglion of tendon
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M67.461Overview

What is the ICD-10 code for ganglion, right knee?

The ICD-10-CM code for ganglion, right knee is M67.461 (sometimes written as M67461). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is M67.461 (Ganglion, knee) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report ganglion, right knee on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does M67.461 group to?

When ganglion, right knee is the principal diagnosis on an inpatient stay, it groups to MS-DRG 557, 558, with relative weights from 0.8873 to 1.4883 depending on complications. Higher weights mean higher Medicare reimbursement.

Can M67.461 be reported with A66.6?

Not as a rule. The Excludes1 note at M67.4, which applies to M67.461, lists "ganglion in yaws (A66.6)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of M67.461?

Under the General Equivalence Mappings, ganglion, right knee converts to ICD-9-CM 727.41 (ganglion of joint) and 727.42 (ganglion of tendon). The mapping is approximate, so confirm the match fits the documentation.