2026 ICD-10-CM Diagnosis Code M90.572Osteonecrosis in diseases classified elsewhere, left ankle and foot
ICD-10-CM Codes›M00–M99›M86-M90›M90
- Billable — Valid for Submission
- Not Chronic
M90.572 is a billable ICD-10-CM diagnosis code for osteonecrosis in diseases classified elsewhere, left ankle and foot. 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 a manifestation code that cannot be reported as the principal diagnosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Aseptic necrosis and osteonecrosis.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for M90.572.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
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Convert M90.572 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M90.572Overview
Is M90.572 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report osteonecrosis in diseases classified elsewhere, left ankle and foot on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does M90.572 group to?
On inpatient claims, osteonecrosis in diseases classified elsewhere, left ankle and foot maps to MS-DRG 553, 554, with relative weights from 0.8301 to 1.2963 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M90.572 be a principal diagnosis?
No. This is a manifestation code: osteonecrosis in diseases classified elsewhere, left ankle and foot describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
What is the ICD-9 equivalent of M90.572?
Under the General Equivalence Mappings, osteonecrosis in diseases classified elsewhere, left ankle and foot converts to ICD-9-CM 731.8 (bone involv in oth dis) and 733.49 (asept necrosis bone NEC). 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.
