Unspecified soft-tissue lesion of the left shoulder — used when the clinical picture points to a shoulder pathology but available documentation doesn't support a more precise diagnosis.
Verified May 8, 2026 · 3 sources ↓
- Status
- Billable
- Chapter
- 13
- Related CPT
- 15
- Region
- Shoulder
Documentation tips
What should appear in the chart to support M75.92.
Source · Editorial brief grounded in 3 cited references ↓
- Explicitly document the affected side as 'left' — laterality must appear in the note to justify the '2' sixth character.
- Record the clinical basis for the lesion designation: imaging findings (MRI signal change, ultrasound abnormality, plain film findings), physical exam findings (palpable mass, crepitus, focal tenderness), or surgical observation that indicates a lesion exists even if its type is undetermined.
- Document why a more specific M75 code cannot yet be assigned — e.g., 'MRI ordered; awaiting results' or 'insufficient imaging to differentiate impingement vs. partial-thickness tear' — to support medical necessity and deflect audit scrutiny.
- Note prior conservative treatment, if any (physical therapy, injections, NSAIDs), to substantiate the clinical workup pathway.
- If the patient is referred with only a general shoulder complaint, document your own clinical impression separately from the referral language rather than echoing unspecified terminology.
Related CPT procedures
Procedure codes commonly billed with M75.92. 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 M75.92 and adjacent codes.
Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓
- Using M75.92 when the note actually names a specific condition: rotator cuff tear, impingement, adhesive capsulitis, or bursitis each have dedicated M75 codes and must be used instead — M75.9x is not a safe fall-back when specificity is available.
- Confusing M75.92 with M25.512 (pain in left shoulder): if the provider documents only pain with no evidence of a lesion, M25.512 is correct; M75.92 requires documentation of an actual lesion, however unspecified.
- Failing to update the code after diagnostic results return — M75.92 used repeatedly across multiple encounters without progression to a specific code will draw payer scrutiny.
- Selecting M75.90 (unspecified shoulder, unspecified lesion) when laterality is clearly documented as left — always match the sixth character to documented laterality: 1 = right, 2 = left, 0 = unspecified.
- Appending a 7th-character extension to M75.92 — M-codes in this category do not use 7th-character extensions; adding one creates an invalid code.
Clinical context
Source · Editorial summary grounded in 3 cited references ↓
M75.92 is the left-laterality code within the M75.9 unspecified shoulder lesion subcategory. Use it when a provider documents a left shoulder lesion or abnormality but does not specify the pathology — for example, no confirmed rotator cuff tear (M75.1x), adhesive capsulitis (M75.0x), impingement syndrome (M75.1x), or bursitis (M75.5x) is identified. It is a true last-resort code; if the encounter note names or strongly implies a specific shoulder condition, that specific code must be used instead.
This code sits under M75 Shoulder lesions, which carries a Type 2 Excludes for shoulder-hand syndrome (M89.0-). If the patient also has shoulder-hand syndrome, code that separately. M75.92 does not apply to shoulder pain without an identified lesion — that routes to M25.512 (pain in left shoulder). The distinction matters: M25.512 is appropriate when pain is the only documented finding; M75.92 requires documented evidence of a lesion, even if unspecified in type.
In practice, M75.92 appears most often as a temporary placeholder when imaging has been ordered but results are pending, or when an initial referral note lacks specificity. Plan to recode to a specific M75 subcategory once diagnostic workup is complete. Payers increasingly flag M75.9x codes for medical necessity reviews, so supporting documentation of why a specific diagnosis could not yet be established is critical.
Sibling codes
Other billable codes under M75.9 (laterality / anatomic variants).
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 3 cited references ↓
01When should I use M75.92 instead of M25.512?
02Can M75.92 be a permanent diagnosis code for a patient's chart?
03Is M75.92 valid for surgical encounters?
04What is the difference between M75.92, M75.82, and M75.52?
05Does M75.92 require a separate code for left shoulder pain?
06Is shoulder-hand syndrome excluded from M75.92?
07Can M75.92 be used as the primary diagnosis for physical therapy orders?
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/M75-/M75.92
- 03aapc.comhttps://www.aapc.com/codes/icd-10-codes/M75.92
Mira AI Scribe
Mira AI Scribe captures laterality ('left'), any imaging findings or abnormal exam findings that establish the presence of a lesion, and the provider's stated reason a specific diagnosis was not assigned. This prevents downcoding to the non-lateralized M75.90 and protects against payer denials citing lack of medical necessity for an unspecified soft-tissue lesion code.
See how Mira captures M75.92 documentation