2026 ICD-10-CM Diagnosis Code M93.921Osteochondropathy, unspecified, right upper arm

ICD-10-CM Codes›M00–M99›M91-M94›M93

ICD-10-CM M93.921
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M93.921 is a billable ICD-10-CM diagnosis code for osteochondropathy, unspecified, right upper arm. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified bone disease and musculoskeletal deformities.

Code Identity

ICD-10-CM Code
M93.921
Billable Status
Yes — Valid for Submission
Code Describes
Osteochondropathy, unspecified, right upper arm
Short Description
Osteochondropathy, unspecified, right upper arm
Same as the full description in the CMS dataset.
Parent Code
M93.92
Osteochondropathy, unspecified of upper arm

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM91-M94Chondropathies
CategoryM93Other osteochondropathies
This CodeM93.921Osteochondropathy, unspecified, right upper arm

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

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 M93.921 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 M93.921Overview

Is M93.921 (Osteochondropathy, unspecified of upper arm) a billable code?

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

What MS-DRG does M93.921 group to?

When osteochondropathy, unspecified, right upper arm 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 M93.921?

Under the General Equivalence Mappings, osteochondropathy, unspecified, right upper arm 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.