M50.121 Cervical disc disorder at C4-C5 level with radiculopathy

Billable ICD-10-CM code, FY2026.

Applicable to

• C4-C5 disc disorder with radiculopathy
• C5 radiculopathy due to disc disorder

Applies from M50 Cervical disc disorders

Includes

• cervicothoracic disc disorders with cervicalgia
• cervicothoracic disc disorders

Applies from M50.1 Cervical disc disorder with radiculopathy

Excludes2 (not included here)

• brachial radiculitis NOS (M54.13)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 722.91 Other and unspecified disc disorder, cervical region (approximate)

Code annotations containing back-references to M50.121

Back-references to M50.1

• Type 1 Excludes: G55 Nerve root and plexus compressions in diseases classified elsewhere ("nerve root compression (due to) (in) intervertebral disc disorders (M50.1.-, M51.1.-)")
• Type 1 Excludes: M54.1 Radiculopathy ("radiculopathy with cervical disc disorder (M50.1)")

Back-references to M50

• Type 1 Excludes: G54 Nerve root and plexus disorders ("intervertebral disc disorders (M50-M51)")
• Type 2 Excludes: M51 Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders ("cervical and cervicothoracic disc disorders (M50.-)")
• Type 2 Excludes: M53.1 Cervicobrachial syndrome ("cervical disc disorder (M50.-)")
• Type 1 Excludes: M54.2 Cervicalgia ("cervicalgia due to intervertebral cervical disc disorder (M50.-)")
• Type 1 Excludes: S13.0 Traumatic rupture of cervical intervertebral disc ("rupture or displacement (nontraumatic) of cervical intervertebral disc NOS (M50.-)")

Diagnosis Index entries for M50.121

• Disorder (of) › disc (intervertebral) › cervical › with › neuritis, radiculitis or radiculopathy › C4-C5
• Radiculopathy › due to › disc disorder › C5

Nearby codes

• M50.1 Cervical disc disorder with radiculopathy
• M50.10 Cervical disc disorder with radiculopathy, unspecified cervical region
• M50.11 Cervical disc disorder with radiculopathy, high cervical region
• M50.12 Cervical disc disorder with radiculopathy, mid-cervical region
• M50.120 Mid-cervical disc disorder, unspecified level
• M50.121 Cervical disc disorder at C4-C5 level with radiculopathy (this code)
• M50.122 Cervical disc disorder at C5-C6 level with radiculopathy
• M50.123 Cervical disc disorder at C6-C7 level with radiculopathy
• M50.13 Cervical disc disorder with radiculopathy, cervicothoracic region
• M50.2 Other cervical disc displacement
• M50.20 Other cervical disc displacement, unspecified cervical region