2026 ICD-10-CM Diagnosis Code M93.90Osteochondropathy, unspecified of unspecified site

ICD-10-CM Codes›M00–M99›M91-M94›M93

ICD-10-CM M93.90
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M93.90 is a billable ICD-10-CM diagnosis code for osteochondropathy, unspecified of unspecified site. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 553 through 554. Coders also document this condition as apophysitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified bone disease and musculoskeletal deformities.

Code Identity

ICD-10-CM Code
M93.90
Billable Status
Yes — Valid for Submission
Code Describes
Osteochondropathy, unspecified of unspecified site
Short Description
Osteochondropathy, unspecified of unspecified site
Same as the full description in the CMS dataset.
Parent Code
M93.9
Osteochondropathy, unspecified

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM91-M94Chondropathies
CategoryM93Other osteochondropathies
This CodeM93.90Osteochondropathy, unspecified of unspecified site

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Apophysitis
  • Epiphysitis
  • Osteochondritis
  • Osteochondropathy

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Osteochondropathy

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

Clinical InformationClinical

  • Legg-Calve-Perthes Disease

    a particular type of femur head necrosis occurring in children, mainly male, with a course of four years or so.

  • Osteochondritis

    inflammation of a bone and its overlaying cartilage.

  • Osteochondritis Dissecans

    a type of osteochondritis in which articular cartilage and associated bone becomes partially or totally detached to form joint loose bodies. affects mainly the knee, ankle, and elbow joints.

  • Femur Head Necrosis

    aseptic or avascular necrosis of the femoral head. the major types are idiopathic (primary), as a complication of fractures or dislocations, and legg-calve-perthes disease.

  • Cartilage

    a non-vascular form of connective tissue composed of chondrocytes embedded in a matrix that includes chondroitin sulfate and various types of fibrillar collagen. there are three major types: hyaline cartilage; fibrocartilage; and elastic cartilage.

  • Apophysitis

    inflammation of a bony outgrowth located near the attachment site for muscles.

  • Osteochondritis

    inflammation of the bone and cartilage.

  • Osteochondritis Dissecans

    osteochondritis that is characterized by fragmentation of cartilage and bone.

Patient EducationClinical

Bone Diseases

Your bones help you move, give you shape and support your body. They are living tissues that rebuild constantly throughout your life. During childhood and your teens, your body adds new bone faster than it removes old bone. After about age 20, you can lose bone faster than you make bone.

Read the full article at MedlinePlus

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

Convert M93.90 to ICD-9-CMHistory

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

ICD-9-CM
732.9 Osteochondropathy 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 M93.90Overview

Is M93.90 (Osteochondropathy, unspecified) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report osteochondropathy, unspecified of unspecified site on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M93.90 group to?

When osteochondropathy, unspecified of unspecified site is the principal diagnosis on an inpatient stay, it groups to MS-DRG 553, 554, with relative weights from 0.8301 to 1.2963 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M93.90?

Under the General Equivalence Mappings, osteochondropathy, unspecified of unspecified site converts to ICD-9-CM 732.9 (osteochondropathy NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.