2026 ICD-10-CM Diagnosis Code M63.852Disorders of muscle in diseases classified elsewhere, left thigh
ICD-10-CM Codes›M00–M99›M60-M63›M63
- Billable — Valid for Submission
- Not Chronic
M63.852 is a billable ICD-10-CM diagnosis code for disorders of muscle in diseases classified elsewhere, left thigh. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 557 through 558. 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 Muscle disorders.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for M63.852.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Muscle Disorders
Your muscles help you move and help your body work. Different types of muscles have different jobs. There are many problems that can affect muscles. Muscle disorders can cause weakness, pain or even paralysis.
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Convert M63.852 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M63.852Overview
Is M63.852 (Disorders of muscle in diseases classified elsewhere, thigh) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report disorders of muscle in diseases classified elsewhere, left thigh on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does M63.852 group to?
On inpatient claims, disorders of muscle in diseases classified elsewhere, left thigh maps to MS-DRG 557, 558, with relative weights from 0.8932 to 1.4869 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M63.852 be a principal diagnosis?
No. This is a manifestation code: disorders of muscle in diseases classified elsewhere, left thigh 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 M63.852?
Under the General Equivalence Mappings, disorders of muscle in diseases classified elsewhere, left thigh converts to ICD-9-CM 728.9 (muscle/ligament dis NOS). 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.
