2026 ICD-10-CM Diagnosis Code M21.852Other specified acquired deformities of left thigh
ICD-10-CM Codes›M00–M99›M20-M25›M21
- Billable — Valid for Submission
- Not Chronic
M21.852 is a billable ICD-10-CM diagnosis code for other specified acquired deformities of left thigh. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acquired deformities (excluding foot).
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acquired coxa valga
- Acquired coxa vara
- Acquired deformity of bilateral thighs
- Acquired deformity of left hip
- Acquired deformity of left thigh
- Acquired deformity of right thigh
- Acquired left coxa valga
- Acquired left coxa vara
- Bilateral acquired coxa vara
- Bilateral acquired deformity of hip regions
- Coxa valga
- Varus deformity of hip
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Coxa Valga
hip deformity in which the angle between the femoral neck and its shaft is increased. it may be congenital, acquired, or developmental.
Patient EducationClinical
Leg Injuries and Disorders
Your legs are made up of bones, blood vessels, muscles, and other connective tissue. They are important for motion and standing. Playing sports, running, falling, or having an accident can damage your legs. Common leg injuries include sprains and strains, joint dislocations, and fractures (broken bones).
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Convert M21.852 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M21.852Overview
Is M21.852 (Other specified acquired deformities of thigh) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified acquired deformities of left thigh on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does M21.852 group to?
When other specified acquired deformities of left thigh 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 M21.852?
Under the General Equivalence Mappings, other specified acquired deformities of left thigh converts to ICD-9-CM 736.39 (acq hip deformity 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.
