2026 ICD-10-CM Diagnosis Code M70.859Other soft tissue disorders related to use, overuse and pressure, unspecified thigh
ICD-10-CM Codes›M00–M99›M70-M79›M70
- Billable — Valid for Submission
- Not Chronic
M70.859 is a billable ICD-10-CM diagnosis code for other soft tissue disorders related to use, overuse and pressure, unspecified thigh. 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
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 M70.859 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M70.859Overview
Is M70.859 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other soft tissue disorders related to use, overuse and pressure, unspecified thigh on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does M70.859 group to?
When other soft tissue disorders related to use, overuse and pressure, unspecified thigh 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 M70.859?
Under the General Equivalence Mappings, other soft tissue disorders related to use, overuse and pressure, unspecified thigh converts to ICD-9-CM 729.99 (soft tissue disorder 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.
