M99.21 Subluxation stenosis of neural canal of cervical region

Billable ICD-10-CM code, FY2026.

Applies from M99 Biomechanical lesions, not elsewhere classified

Notes

• This category should not be used if the condition can be classified elsewhere.

MS-DRG index

Defines the logic of DRG(s) 551-552 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 723.0 Spinal stenosis in cervical region (approximate)

Code annotations containing back-references to M99.21

Back-references to M99

• Type 1 Excludes: M43.5 Other recurrent vertebral dislocation ("biomechanical lesions NEC (M99.-)")

Diagnosis Index entries for M99.21

• Stenosis, stenotic (cicatricial) › neural canal › subluxation › cervical region
• Stenosis, stenotic (cicatricial) › neural canal › subluxation › cervicothoracic

Nearby codes

• M99.17 Subluxation complex (vertebral) of upper extremity
• M99.18 Subluxation complex (vertebral) of rib cage
• M99.19 Subluxation complex (vertebral) of abdomen and other regions
• M99.2 Subluxation stenosis of neural canal
• M99.20 Subluxation stenosis of neural canal of head region
• M99.21 Subluxation stenosis of neural canal of cervical region (this code)
• M99.22 Subluxation stenosis of neural canal of thoracic region
• M99.23 Subluxation stenosis of neural canal of lumbar region
• M99.24 Subluxation stenosis of neural canal of sacral region
• M99.25 Subluxation stenosis of neural canal of pelvic region
• M99.26 Subluxation stenosis of neural canal of lower extremity