2026 ICD-10-CM Diagnosis Code S39.013AStrain of muscle, fascia and tendon of pelvis, initial encounter
S39.013A is a billable ICD-10-CM diagnosis code for strain of muscle, fascia and tendon of pelvis, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 562 through 563, 963 through 965. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sprains and strains, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Dislocations, sprains and strains involving multiple body regions
- Dislocations, sprains and strains involving thorax with lower back and pelvis
- Dislocations/sprains/strains
- Injury of fascia of pelvis
- Injury of muscle of pelvis
- Injury of tendon of pelvis
- Strain of fascia of pelvis
- Strain of muscle of pelvis
- Strain of tendon of gluteus muscle
- Strain of tendon of left gluteal muscle
- Strain of tendon of left lower limb
- Strain of tendon of pelvis
- Strain of tendon of right gluteal muscle
- Strain of tendon of right lower limb
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Other and unspecified injuries of abdomen, lower back, pelvis and external genitals (S39). Use the following options for the applicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Sprains and Strains
A sprain is a stretched or torn ligament. Ligaments are tissues that connect bones at a joint. Falling, twisting, or getting hit can all cause a sprain. Ankle and wrist sprains are common. Symptoms include pain, swelling, bruising, and being unable to move your joint. You might feel a pop or tear when the injury happens.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S39.013A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S39.013AOverview
Is S39.013A (Strain of muscle, fascia and tendon of pelvis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report strain of muscle, fascia and tendon of pelvis, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in S39.013A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for strain of muscle, fascia and tendon of pelvis, such as an emergency visit or first evaluation.
What MS-DRG does S39.013A group to?
When strain of muscle, fascia and tendon of pelvis, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 562, 563, 963, 964, 965, with relative weights from 0.8955 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of S39.013A?
Under the General Equivalence Mappings, strain of muscle, fascia and tendon of pelvis, initial encounter converts to ICD-9-CM 848.8 (sprain 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.
