2027 ICD-10-CM Diagnosis Code M94.359Chondrolysis, unspecified hip

ICD-10-CM Codes›M00–M99›M91-M94›M94

ICD-10-CM M94.359
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M94.359 is a billable ICD-10-CM diagnosis code for chondrolysis, unspecified hip. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 564 through 566. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified bone disease and musculoskeletal deformities.

Code Identity

ICD-10-CM Code
M94.359
Billable Status
Yes — Valid for Submission
Code Describes
Chondrolysis, unspecified hip
Short Description
Chondrolysis, unspecified hip
Same as the full description in the CMS dataset.
Parent Code
M94.35
Chondrolysis, hip

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM91-M94Chondropathies
CategoryM94Other disorders of cartilage
This CodeM94.359Chondrolysis, unspecified hip

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M94.359: its own notes plus those printed at M94.3, block M91-M94, 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 Block M91-M94 Chondropathies applies to 212 codes
  • postprocedural chondropathies (M96.-)

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 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)

Code First

The underlying condition named in the note is sequenced before this code.

From M94.3 Chondrolysis applies to 3 codes
  • any associated slipped upper femoral epiphysis (nontraumatic) (M93.0-)

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 M94.359, its category, or a range that includes it.

Use Additional Code 1

These codes say to use an additional code from the note, and M94.359 is one of the codes named.

  • M93.0 Slipped upper femoral epiphysis (nontraumatic)
    code for associated chondrolysis (M94.3) names M94.3, which includes this code

Clinical ClassificationClinical

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

CCSR MUS028
Other specified bone disease and musculoskeletal deformities
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Cartilage Disorders

Cartilage is the tough but flexible tissue that covers the ends of your bones at a joint. It also gives shape and support to other parts of your body, such as your ears, nose and windpipe. Healthy cartilage helps you move by allowing your bones to glide over each other.

Read the full article at MedlinePlus

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

Convert M94.359 to ICD-9-CMHistory

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

ICD-9-CM
733.99 Bone & cartilage dis NEC
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 M94.359Overview

What is the ICD-10 code for chondrolysis, unspecified hip?

The ICD-10-CM code for chondrolysis, unspecified hip is M94.359 (sometimes written as M94359). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is M94.359 (Chondrolysis, hip) a billable code?

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

What MS-DRG does M94.359 group to?

When chondrolysis, unspecified hip is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 566, 565, with relative weights from 0.7374 to 1.4909 depending on complications. Higher weights mean higher Medicare reimbursement.

Can M94.359 be reported with a code from M96?

Not as a rule. The Excludes1 note at block M91-M94, which applies to M94.359, lists "postprocedural chondropathies (M96.-)". 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 coded first with M94.359?

The Code First note at M94.3, which applies to M94.359, reads: any associated slipped upper femoral epiphysis (nontraumatic) (M93.0-). When one of these applies, it is sequenced before M94.359.