Iliotibial band syndrome of the left leg — a friction-based enthesopathy of the lower limb where the IT band repeatedly rubs against the lateral femoral epicondyle, producing lateral knee or thigh pain.
Verified May 8, 2026 · 6 sources ↓
- Status
- Billable
- Chapter
- 13
- Related CPT
- 7
- Region
- Knee
Documentation tips
What should appear in the chart to support M76.32.
Source · Editorial brief grounded in 6 cited references ↓
- Provider must explicitly name the affected side — 'left leg,' 'left knee,' or 'left lower extremity' — before M76.32 can be assigned; ambiguous notes default to M76.30.
- Document the clinical findings that confirm ITBS: tenderness over the lateral femoral epicondyle, pain with knee flexion at approximately 30°, and a positive Ober test or Noble compression test.
- Record the activity or biomechanical context (e.g., running volume, hip abductor weakness, leg length discrepancy) to support medical necessity for physical therapy or injection procedures.
- If imaging (ultrasound or MRI) was obtained, note relevant findings such as IT band thickening or peritendinous fluid at the lateral epicondyle to strengthen the documentation.
- For injection encounters, document the exact anatomic target (IT band bursa vs. peritendinous tissue), substance injected, and the clinical rationale — required to satisfy CMS A57079 medical necessity criteria.
Related CPT procedures
Procedure codes commonly billed with M76.32. Linking the right diagnosis to the right procedure is what establishes medical necessity.
Source · CMS LCDs · AAOS specialty guidance · claims-pattern analysis
Common coding pitfalls
The recurring mistakes coders make with M76.32 and adjacent codes.
Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓
- Submitting the non-billable parent M76.3 instead of carrying the diagnosis to the laterality-specific 5th-character code — payers will reject or downcode the claim.
- Defaulting to M76.30 (unspecified) when the note actually names the left side; auditors flag this as undercoding when laterality is documented.
- Confusing ITBS with lateral knee bursitis — if the pathology is bursitis due to overuse, M70.- codes apply; M76.32 is for the friction enthesopathy of the IT band specifically.
- Coding M76.32 alongside M24.8 for the same ITBS presentation — M24.8 carries an Excludes2 for M76.3-, so the conditions must represent truly distinct pathologies to be billed together.
- Using a traumatic soft-tissue injury S-code when the mechanism is repetitive overuse; ITBS is a chronic enthesopathy and belongs in the M-code range, not the S-code injury range.
Clinical context
Source · Editorial summary grounded in 6 cited references ↓
M76.32 is the fully specified, billable code for iliotibial band syndrome of the left leg. Use it only when the provider explicitly documents the left side. If laterality is not stated, default to M76.30 (unspecified leg). If the right leg is documented, use M76.31. The parent code M76.3 is non-billable and cannot be submitted for reimbursement — always carry the diagnosis down to the 5th-character level.
ITBS falls under the M76 enthesopathies block (lower limb, excluding foot). Two Excludes2 notes apply to the parent category: bursitis due to use, overuse, and pressure (M70.-) and enthesopathies of ankle and foot (M77.5-). Those conditions can be coded alongside M76.32 when separately documented, but they are not the same entity. Also note that M24.8 (other specific joint derangements) carries its own Excludes2 pointing back to M76.3-, confirming ITBS belongs here, not in the joint derangement block.
M76.32 is listed in CMS LCD/billing article A57079 as a diagnosis that supports medical necessity for tendon and ligament injection procedures. When billing corticosteroid or other injections targeting the IT band, pair M76.32 with the appropriate CPT injection code to satisfy medical necessity requirements. For physical therapy or rehabilitation services, M76.32 is similarly the preferred specificity level to avoid claim edits.
Sibling codes
Other billable codes under M76.3 (laterality / anatomic variants).
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 6 cited references ↓
01Can I use M76.3 directly on a claim?
02What if the provider documents bilateral ITBS?
03Is M76.32 appropriate for a corticosteroid injection into the IT band?
04How does ITBS differ from lateral knee bursitis for coding purposes?
05Can M76.32 be used for an encounter where the patient is only receiving physical therapy?
06Does M76.32 require a 7th-character extension?
07What if the note says 'runner's knee' without specifying laterality?
Sources & references
Editorial content was developed using the following public sources. Last verified May 8, 2026.
- 01CDC ICD-10-CM Tabular List 2026 (effective Oct 1, 2025)
- 02icd10data.comhttps://www.icd10data.com/ICD10CM/Codes/M00-M99/M70-M79/M76-/M76.32
- 03icd10data.comhttps://www.icd10data.com/ICD10CM/Codes/M00-M99/M70-M79/M76-/M76.3
- 04cms.govhttps://www.cms.gov/medicare-coverage-database/view/article.aspx?articleid=57079&ver=3
- 05aapc.comhttps://www.aapc.com/codes/icd-10-codes/M76.32
- 06icdcodes.aihttps://icdcodes.ai/icd10/M76.32
Mira AI Scribe
The Mira AI Scribe captures the provider's explicit laterality call ('left leg'), the clinical exam findings (lateral femoral epicondyle tenderness, pain at 30° knee flexion), any positive provocative tests, and the activity or training history that establishes overuse etiology. That documentation locks in M76.32 and prevents a downcode to the unspecified M76.30 — which can trigger payer edits and delay reimbursement for associated injection or therapy claims.
See how Mira captures M76.32 documentation