Adhesive capsulitis affecting the shoulder joint when the operative or affected side has not been documented or cannot be determined — also known as frozen shoulder or periarthritis of the shoulder.

Documentation tips

What should appear in the chart to support M75.00.

Source · Editorial brief grounded in 4 cited references ↓

• Record the affected side explicitly — 'right' or 'left' — in every encounter note; if truly bilateral, document that both sides are involved so a unilateral vs. bilateral coding decision can be made.
• Include functional deficits tied to the shoulder (overhead reach, external rotation loss, activities of daily living limitations) to establish medical necessity for procedures and physical therapy.
• Document the clinical stage of adhesive capsulitis (freezing, frozen, thawing) when known, as this supports treatment decisions and medical necessity narratives.
• If imaging (X-ray, MRI, ultrasound) is obtained to rule out concurrent pathology, summarize relevant findings — joint space, capsular thickening, rotator cuff integrity — in the assessment.
• When querying for laterality prior to coding, document the query and the provider's response in the record so the audit trail supports the lateral-specific code.

Related CPT procedures

Procedure codes commonly billed with M75.00. 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 M75.00 and adjacent codes.

Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓

• Defaulting to M75.00 when laterality is present but buried in the HPI or physical exam — read the full note before accepting unspecified.
• Using M75.00 with unilateral procedure codes (e.g., a shoulder injection or manipulation under anesthesia billed for one side) creates a medical necessity mismatch that triggers payer edits.
• Confusing adhesive capsulitis with rotator cuff tear (M75.1x) or glenohumeral osteoarthritis (M19.019) — these are distinct diagnoses with different code families even when they coexist.
• Omitting a query to the provider when laterality is missing, which locks the claim into an unspecified code that could have been resolved with a simple addendum.
• Coding from a problem list or superbill that carries forward an old unspecified code rather than reflecting the current encounter's documented laterality.

Clinical context

Source · Editorial summary grounded in 4 cited references ↓

Sibling codes

Other billable codes under M75.0 (laterality / anatomic variants).