Vertebral subluxation complex localized to the sacral region, classified under biomechanical lesions not elsewhere classified (M99 category).

Documentation tips

What should appear in the chart to support M99.14.

Source · Editorial brief grounded in 5 cited references ↓

• Specify 'sacral region' or 'sacrococcygeal' or 'sacroiliac' explicitly in the assessment — all three index to M99.14.
• Document the clinical findings supporting subluxation: motion restriction, asymmetry, tissue texture changes, and tenderness at the sacral level.
• For Medicare claims, record the subluxation complex as the primary diagnosis and add a secondary symptom code such as M54.18 (radiculopathy, sacral and sacrococcygeal region) or M54.5x (low back pain) to meet LCD documentation requirements.
• Note whether imaging (X-ray, MRI) was obtained and any relevant findings — sacral misalignment, joint space changes, or disc pathology at the lumbosacral junction.
• If multiple spinal regions are treated in the same encounter, document and code each region separately (e.g., M99.13 for lumbar, M99.14 for sacral).

Related CPT procedures

Procedure codes commonly billed with M99.14. 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 M99.14 and adjacent codes.

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

• Assigning M99.04 (segmental and somatic dysfunction, sacral region) instead of M99.14 — use M99.04 only for osteopathic somatic dysfunction documentation, not chiropractic subluxation complex terminology.
• Using M99.15 (subluxation complex, pelvic region) when the documented subluxation is at the sacrum or sacroiliac joint — the ICD-10-CM index routes sacral, sacrococcygeal, and sacroiliac subluxation complex to M99.14, not M99.15.
• Listing M99.14 as a secondary diagnosis on Medicare chiropractic claims — Medicare LCDs require the subluxation code as first-listed.
• Omitting a supporting symptom or pain code as a secondary diagnosis on Medicare claims, which can trigger denials under certain MAC LCDs requiring clinical context beyond the subluxation code alone.

Clinical context

Source · Editorial summary grounded in 5 cited references ↓

Sibling codes

Other billable codes under M99.1 (laterality / anatomic variants).