2026 ICD-10-CM Diagnosis Code M91Juvenile osteochondrosis of hip and pelvis

ICD-10-CM Codes›M00–M99›M91-M94›M91

ICD-10-CM M91
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M91 is a non-billable ICD-10-CM category code for juvenile osteochondrosis of hip and pelvis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as M91.0, M91.10, M91.11, and M91.12.

Code Identity

ICD-10-CM Code
M91
Billable Status
No — Non-Billable Category
Code Describes
Juvenile osteochondrosis of hip and pelvis
Short Description
Juvenile osteochondrosis of hip and pelvis
Same as the full description in the CMS dataset.
Chapter
M91-M94
Chondropathies

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM91-M94Chondropathies
CategoryM91Juvenile osteochondrosis of hip and pelvis
This CodeM91Juvenile osteochondrosis of hip and pelvis

Specific Coding for Juvenile osteochondrosis of hip and pelvisOverview

Non-specific codes like M91 require more characters. Use one of these billable codes instead:

  • Use M91.0 for Juvenile osteochondrosis of pelvis

  • M91.1 for Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes]

  • Use M91.10 for Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes], unspecified leg

  • Use M91.11 for Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes], right leg

  • Use M91.12 for Juvenile osteochondrosis of head of femur [Legg-Calve-Perthes], left leg

  • M91.2 for Coxa plana

  • Use M91.20 for Coxa plana, unspecified hip

  • Use M91.21 for Coxa plana, right hip

  • Use M91.22 for Coxa plana, left hip

  • M91.3 for Pseudocoxalgia

  • Use M91.30 for Pseudocoxalgia, unspecified hip

  • Use M91.31 for Pseudocoxalgia, right hip

  • Use M91.32 for Pseudocoxalgia, left hip

  • M91.4 for Coxa magna

  • Use M91.40 for Coxa magna, unspecified hip

  • Use M91.41 for Coxa magna, right hip

  • Use M91.42 for Coxa magna, left hip

  • M91.8 for Other juvenile osteochondrosis of hip and pelvis

  • Use M91.80 for Other juvenile osteochondrosis of hip and pelvis, unspecified leg

  • Use M91.81 for Other juvenile osteochondrosis of hip and pelvis, right leg

  • Use M91.82 for Other juvenile osteochondrosis of hip and pelvis, left leg

  • M91.9 for Juvenile osteochondrosis of hip and pelvis, unspecified

  • Use M91.90 for Juvenile osteochondrosis of hip and pelvis, unspecified, unspecified leg

  • Use M91.91 for Juvenile osteochondrosis of hip and pelvis, unspecified, right leg

  • Use M91.92 for Juvenile osteochondrosis of hip and pelvis, unspecified, left leg

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • slipped upper femoral epiphysis nontraumatic M93.0

Patient EducationClinical

Hip Injuries and Disorders

Your hip is the joint where your femur (thigh bone) meets your pelvis (hip bone). There are two main parts: a ball at the end of the femur, which fits in a socket in the pelvis. Your hip is known as a ball-and-socket joint. This is because you have a ball at the end of your femur, and it fits into a socket in your pelvis.

Read the full article at MedlinePlus

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

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 M91Overview

Is M91 (Juvenile osteochondrosis of hip and pelvis) a billable code?

No. This is a category header that groups the codes for juvenile osteochondrosis of hip and pelvis, and headers cannot be submitted on claims. Claims for juvenile osteochondrosis of hip and pelvis need a more specific code from this category, such as M91.0, M91.10, and M91.11.