2026 ICD-10-CM Diagnosis Code M70.979Unspecified soft tissue disorder related to use, overuse and pressure, unspecified ankle and foot
ICD-10-CM Codes›M00–M99›M70-M79›M70
- Billable — Valid for Submission
- Not Chronic
M70.979 is a billable ICD-10-CM diagnosis code for unspecified soft tissue disorder related to use, overuse and pressure, unspecified 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 555 through 556. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified connective tissue disease.
Code Identity
Code Classification
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Ankle Injuries and Disorders
Your ankle bone and the ends of your two lower leg bones make up the ankle joint. Your ligaments, which connect bones to one another, stabilize and support it. Your muscles and tendons move it.
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Convert M70.979 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M70.979Overview
Is M70.979 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified soft tissue disorder related to use, overuse and pressure, unspecified ankle and foot on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does M70.979 group to?
When unspecified soft tissue disorder related to use, overuse and pressure, unspecified ankle and foot is the principal diagnosis on an inpatient stay, it groups to MS-DRG 555, 556, with relative weights from 0.8306 to 1.3218 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of M70.979?
Under the General Equivalence Mappings, unspecified soft tissue disorder related to use, overuse and pressure, unspecified ankle and foot converts to ICD-9-CM 729.90 (soft tissue disord 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.
