ICD-10-CM 2027
ICD-10 code for Spondylolysis
From the official ICD-10-CM alphabetic index entry “Spondylolysis (acquired)”. Page updated September 29, 2026.
About coding Spondylolysis
The ICD-10-CM code for Spondylolysis is M43.00 (Spondylolysis, site unspecified). The official index lists 12 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M43.00.
Within M43.0, choose M43.00 (site unspecified) only when documentation doesn't support a more specific option: occipito-atlanto-axial region (M43.01), cervical region (M43.02), cervicothoracic region (M43.03), thoracic region (M43.04), thoracolumbar region (M43.05), lumbar region (M43.06), lumbosacral region (M43.07), sacral and sacrococcygeal region (M43.08) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 551 (Medical Back Problems with MCC, relative weight 1.6358) and DRG 552 (Medical Back Problems without MCC, relative weight 0.9584), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Spondylolysis codes (official index)
- cervical region M43.02 — Spondylolysis, cervical region
- cervicothoracic region M43.03 — Spondylolysis, cervicothoracic region
- congenital Q76.2 — Congenital spondylolisthesis
- lumbar region M43.06 — Spondylolysis, lumbar region
- lumbosacral region M43.07 — Spondylolysis, lumbosacral region
- with disproportion (fetopelvic) O33.0 — Maternal care for disproportion due to deformity of maternal pelvic bones
- causing obstructed labor O65.8 — Obstructed labor due to other maternal pelvic abnormalities
- multiple sites M43.09 — Spondylolysis, multiple sites in spine
- occipito-atlanto-axial region M43.01 — Spondylolysis, occipito-atlanto-axial region
- sacrococcygeal region M43.08 — Spondylolysis, sacral and sacrococcygeal region
- thoracic region M43.04 — Spondylolysis, thoracic region
- thoracolumbar region M43.05 — Spondylolysis, thoracolumbar region
Common questions about Spondylolysis ICD-10 codes
What is the ICD-10 code for Spondylolysis?
- M43.00 — Spondylolysis, site unspecified. More specific codes apply when the documentation supports them: M43.02, M43.03, Q76.2, M43.06 and others below.
What is the ICD-10 code for cervical region spondylolysis?
- M43.02 — Spondylolysis, cervical region.
What is the ICD-10 code for cervicothoracic region spondylolysis?
- M43.03 — Spondylolysis, cervicothoracic region.
What is the ICD-10 code for congenital spondylolysis?
- Q76.2 — Congenital spondylolisthesis.
What is the ICD-10 code for lumbar region spondylolysis?
- M43.06 — Spondylolysis, lumbar region.
What is the ICD-10 code for lumbosacral region spondylolysis?
- M43.07 — Spondylolysis, lumbosacral region.
What is the ICD-10 code for multiple sites spondylolysis?
- M43.09 — Spondylolysis, multiple sites in spine.
Is M43.00 billable?
- Yes. M43.00 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M43.00 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M43.00 as a principal diagnosis.
Is M43.00 a CC or MCC?
- No. M43.00 is neither a CC nor an MCC under MS-DRG v44.0.