2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M91: its own notes plus those printed at 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.

On M91 itself
  • slipped upper femoral epiphysis (nontraumatic) (M93.0-)
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)

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 M91, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming M91: they are not reported together with it, unless the two conditions are unrelated.

  • M87 Osteonecrosis
    juvenile osteonecrosis (M91-M92)

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M91Overview

What is the ICD-10 code for juvenile osteochondrosis of hip and pelvis?

M91 is the ICD-10-CM category for juvenile osteochondrosis of hip and pelvis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can M91 be reported with a code from M93.0?

Not as a rule. The Excludes1 note on M91 lists "slipped upper femoral epiphysis (nontraumatic) (M93.0-)". 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).