ICD-10-CM 2027
ICD-10 code for facet joint hypertrophy
From the official ICD-10-CM alphabetic index entry “Hypertrophy, hypertrophic › facet joint”. Page updated September 29, 2026.
About coding facet joint hypertrophy
The ICD-10-CM code for facet joint hypertrophy is M47.819 (Spondylosis without myelopathy or radiculopathy, site unspecified).
Within M47.81, choose M47.819 (site unspecified) only when documentation doesn't support a more specific option: occipito-atlanto-axial region (M47.811), cervical region (M47.812), cervicothoracic region (M47.813), thoracic region (M47.814), thoracolumbar region (M47.815), lumbar region (M47.816), lumbosacral region (M47.817) and sacral and sacrococcygeal region (M47.818).
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.
Common questions about facet joint hypertrophy ICD-10 codes
What is the ICD-10 code for facet joint hypertrophy?
- M47.819 — Spondylosis without myelopathy or radiculopathy, site unspecified.
Is M47.819 billable?
- Yes. M47.819 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M47.819 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M47.819 as a principal diagnosis.
Is M47.819 a CC or MCC?
- No. M47.819 is neither a CC nor an MCC under MS-DRG v44.0.