2026 ICD-10-CM Diagnosis Code M11.051Hydroxyapatite deposition disease, right hip

ICD-10-CM Codes›M00–M99›M05-M14›M11

ICD-10-CM M11.051
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M11.051 is a billable ICD-10-CM diagnosis code for hydroxyapatite deposition disease, right hip. 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 hydroxyapatite deposition disease of bilateral hips. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Crystal arthropathies (excluding gout).

Code Identity

ICD-10-CM Code
M11.051
Billable Status
Yes — Valid for Submission
Code Describes
Hydroxyapatite deposition disease, right hip
Short Description
Hydroxyapatite deposition disease, right hip
Same as the full description in the CMS dataset.
Parent Code
M11.05
Hydroxyapatite deposition disease, hip

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM05-M14Inflammatory polyarthropathies
CategoryM11Other crystal arthropathies
This CodeM11.051Hydroxyapatite deposition disease, right hip

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Hydroxyapatite deposition disease of bilateral hips
  • Hydroxyapatite deposition disease of hip joint
  • Hydroxyapatite deposition disease of left hip
  • Hydroxyapatite deposition disease of right hip

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MUS034
Crystal arthropathies (excluding gout)
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Arthritis

If you feel pain and stiffness in your body or have trouble moving around, you might have arthritis. Any disorder that affects the joints is often called arthritis. Joints are places where two bones meet, such as your elbow or knee.

The full article covers:

  • What is arthritis?
  • What are the types of arthritis?
  • What are the symptoms of arthritis?
  • Who is more likely to get arthritis?
  • How is arthritis diagnosed?
  • What are the treatments for arthritis?

Read the full article at MedlinePlus

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

Convert M11.051 to ICD-9-CMHistory

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

ICD-9-CM
712.85 Cryst arthrop NEC-pelvis
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 M11.051Overview

Is M11.051 (Hydroxyapatite deposition disease, hip) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report hydroxyapatite deposition disease, right hip on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M11.051 group to?

When hydroxyapatite deposition disease, right hip 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 M11.051?

Under the General Equivalence Mappings, hydroxyapatite deposition disease, right hip converts to ICD-9-CM 712.85 (cryst arthrop NEC-pelvis). 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.