2026 ICD-10-CM Diagnosis Code M93.1Kienbock's disease of adults

ICD-10-CM Codes›M00–M99›M91-M94›M93

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

M93.1 is a billable ICD-10-CM diagnosis code for Kienbock's disease of adults. 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. The code is restricted by the Medicare Code Editor to adult patients (age 15 through 124). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified bone disease and musculoskeletal deformities.

Code Identity

ICD-10-CM Code
M93.1
Billable Status
Yes — Valid for Submission
Code Describes
Kienbock's disease of adults
Short Description
Kienbock's disease of adults
Same as the full description in the CMS dataset.
Parent Code
M93
Other osteochondropathies

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM91-M94Chondropathies
CategoryM93Other osteochondropathies
This CodeM93.1Kienbock's disease of adults

Code EditsBilling

Medicare Code Editor checks that affect claim validity for M93.1.

Adult diagnoses
The Medicare Code Editor detects inconsistencies in adult cases by checking a patient's age and any diagnosis on the patient's record. The adult code edits apply to patients age range is 15–124 years inclusive (e.g., senile delirium, mature cataract).

Tabular List NotesGuidance

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

Inclusion Terms

  • Adult osteochondrosis of carpal lunates

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.

    • Kienböck's disease
      • adult
    • Osteochondropathy
      • Kienböck's disease of adults
    • Osteochondrosis
      • carpal (juvenile) (lunate) (scaphoid)
        • adult
    • Osteochondrosis
      • Kienböck's
        • adult
    • Osteochondrosis
      • lunate bone (carpal) (juvenile)
        • adult

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

Osteonecrosis

Osteonecrosis is a disease caused by reduced blood flow to bones in the joints. In people with healthy bones, new bone is always replacing old bone. In osteonecrosis, the lack of blood causes the bone to break down faster than the body can make enough new bone. The bone starts to die and may break down.

Read the full article at MedlinePlus

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

Convert M93.1 to ICD-9-CMHistory

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

ICD-9-CM
732.8 Osteochondropathy 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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M93.1Overview

Is M93.1 (Other osteochondropathies) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report Kienbock's disease of adults on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M93.1 group to?

When Kienbock's disease of adults 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.

Who can M93.1 be reported for?

The Medicare Code Editor checks Kienbock's disease of adults against patient demographics: this code is intended for adult patients (age 15 through 124). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of M93.1?

Under the General Equivalence Mappings, Kienbock's disease of adults converts to ICD-9-CM 732.8 (osteochondropathy NEC). 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.