2026 ICD-10-CM Diagnosis Code M89.169Physeal arrest, lower leg, unspecified

ICD-10-CM Codes›M00–M99›M86-M90›M89

ICD-10-CM M89.169
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M89.169 is a billable ICD-10-CM diagnosis code for physeal arrest, lower leg, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 564 through 566. Coders also document this condition as complete epiphyseal arrest. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified bone disease and musculoskeletal deformities.

Code Identity

ICD-10-CM Code
M89.169
Billable Status
Yes — Valid for Submission
Code Describes
Physeal arrest, lower leg, unspecified
Short Description
Physeal arrest, lower leg, unspecified
Same as the full description in the CMS dataset.
Parent Code
M89.16
Physeal arrest, lower leg

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM86-M90Other osteopathies
CategoryM89Other disorders of bone
This CodeM89.169Physeal arrest, lower leg, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Complete epiphyseal arrest
  • Complete epiphyseal arrest of distal tibia
  • Complete epiphyseal arrest of proximal tibia
  • Epiphyseal arrest of bilateral lower legs
  • Epiphyseal arrest of left lower leg
  • Epiphyseal arrest of lower leg
  • Epiphyseal arrest of right lower leg
  • Partial epiphyseal arrest of distal tibia

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 M89.169 to ICD-9-CMHistory

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

ICD-9-CM
733.91 Arrest of bone growth
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 M89.169Overview

Is M89.169 (Physeal arrest, lower leg) a billable code?

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

What MS-DRG does M89.169 group to?

When physeal arrest, lower leg, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 565, 566, with relative weights from 0.7493 to 1.5436 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M89.169?

Under the General Equivalence Mappings, physeal arrest, lower leg, unspecified converts to ICD-9-CM 733.91 (arrest of bone growth). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.