M51.A1
Intervertebral annulus fibrosus defect, small, lumbar region
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 12 never code together
M51code
M00-M99chapter
Excludes2
- arthropathic psoriasis (L40.5-)L40.5-
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- compartment syndrome (traumatic) (T79.A-)T79.A-
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 2
Index entries leading here 1
Alongside this code 5 same parent — M51.A
M51.A0 Intvrt annulus fibrosus defect, lumbar region, unsp size M51.A2 Intervertebral annulus fibrosus defect, large, lumbar region M51.A3 Intvrt annulus fibrosus defect, lumbosacr region, unsp size M51.A4 Intvrt annulus fibrosus defect, small, lumbosacral region M51.A5 Intvrt annulus fibrosus defect, large, lumbosacral region
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.