ICD-10-CM 2026 · Effective October 1, 2025

ICD-10 M51.A2

Billable / Specific

Intervertebral annulus fibrosus defect, large, lumbar region

M51
Block
0
Synonyms
84
LCDs
2
Payer Policies
0
Linked CPTs

About ICD-10-CM M51.A2

ICD-10-CM code M51.A2 represents Intervertebral annulus fibrosus defect, large, lumbar region. This is a billable/specific code in the Musculoskeletal and Connective Tissue chapter (block M51). The 2026 edition of ICD-10-CM M51.A2 became effective on October 1, 2025.

Coding Notes

Code First

  • , if applicable, lumbar disc herniation (M51.06, M51.16, M51.26)

Medicare LCD Coverage for M51.A2

Local Coverage Determinations (LCDs) from CMS MACs that list M51.A2 as a covered diagnosis.

84 LCDs

Showing top 10 of 84 total . Click a CPT for full coverage scope.

CMS LCD: Billing and Coding: Lumbar MRI
Article ID: 57206, Effective: 2025-10-23 00:00:00, 3361 covered, 0 non-covered
CPT Q9953 →
CMS LCD: Billing and Coding: Lumbar MRI
Article ID: 57206, Effective: 2025-10-23 00:00:00, 3361 covered, 0 non-covered
CPT 72148 →
CMS LCD: Billing and Coding: Lumbar MRI
Article ID: 57206, Effective: 2025-10-23 00:00:00, 3361 covered, 0 non-covered
CPT A9585 →
CMS LCD: Billing and Coding: Lumbar MRI
Article ID: 57206, Effective: 2025-10-23 00:00:00, 3361 covered, 0 non-covered
CPT 72158 →
CMS LCD: Billing and Coding: Lumbar MRI
Article ID: 57206, Effective: 2025-10-23 00:00:00, 3361 covered, 0 non-covered
CPT 72149 →
CMS LCD: Billing and Coding: Outpatient Physical Therapy
Article ID: 53065, Effective: 2026-01-01 00:00:00, 22208 covered, 0 non-covered
CPT 29131 →
CMS LCD: Billing and Coding: Outpatient Physical Therapy
Article ID: 53065, Effective: 2026-01-01 00:00:00, 22208 covered, 0 non-covered
CPT 29260 →
CMS LCD: Billing and Coding: Outpatient Physical Therapy
Article ID: 53065, Effective: 2026-01-01 00:00:00, 22208 covered, 0 non-covered
CPT 29580 →
CMS LCD: Billing and Coding: Outpatient Physical Therapy
Article ID: 53065, Effective: 2026-01-01 00:00:00, 22208 covered, 0 non-covered
CPT 97036 →
CMS LCD: Billing and Coding: Outpatient Physical Therapy
Article ID: 53065, Effective: 2026-01-01 00:00:00, 22208 covered, 0 non-covered
CPT 29445 →

Commercial Payer Coverage

Coverage policies from major commercial payers referencing M51.A2.

2 policies

2 Medicare

Billing and Coding: Outpatient Physical Therapy
Policy ID: ART-53065
Billing and Coding: Lumbar MRI
Policy ID: ART-57206

CPT Codes Commonly Billed with M51.A2

Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.

No procedure linkages on file for M51.A2

We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.

Codes Adjacent To M51.A2

Other codes in section M50-M54 (Other dorsopathies).

M50 Cervical disc disorders (non-billable) M50.0 Cervical disc disorder with myelopathy (non-billable) M50.00 Cervical disc disorder with myelopathy, unspecified cervical region M50.01 Cervical disc disorder with myelopathy, high cervical region M50.02 Cervical disc disorder with myelopathy, mid-cervical region (non-billable) M50.020 Cervical disc disorder with myelopathy, mid-cervical region, unspecified level M50.021 Cervical disc disorder at C4-C5 level with myelopathy M50.022 Cervical disc disorder at C5-C6 level with myelopathy M50.023 Cervical disc disorder at C6-C7 level with myelopathy M50.03 Cervical disc disorder with myelopathy, cervicothoracic region M50.1 Cervical disc disorder with radiculopathy (non-billable) 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 (non-billable) M50.120 Mid-cervical disc disorder, unspecified level M50.121 Cervical disc disorder at C4-C5 level with radiculopathy 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 (non-billable)

ICD-10 M51.A2, Billing FAQ

Is ICD-10 code M51.A2 billable? +

Yes, M51.A2 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.

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Reviewed by the PayerReady Medical Coding Team

Verified against the CMS 2026 code set on May 31, 2026.

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