ICD-10 D33.4
Billable / Specific HCC v28: 12Benign neoplasm of spinal cord
About ICD-10-CM D33.4
ICD-10-CM code D33.4 represents Benign neoplasm of spinal cord. This is a billable/specific code in the Neoplasms chapter (block D33). The 2026 edition of ICD-10-CM D33.4 became effective on October 1, 2025.
Coding Tips for D33.4
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
D33.4 is a CMS-HCC v28 risk-adjustment code (category 12). To count for the patient Risk Adjustment Factor (RAF), document the diagnosis with MEAT language each calendar year: Monitored, Evaluated, Assessed, Treated. A diagnosis on the problem list alone does not satisfy CMS RADV audit standards. Include the diagnosis in the assessment with current status and current treatment plan.
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Medicare LCD Coverage for D33.4
Local Coverage Determinations (LCDs) from CMS MACs that list D33.4 as a covered diagnosis.
Showing top 10 of 559 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing D33.4.
1 Aetna
2 Cigna
5 Medicare
CPT Codes Commonly Billed with D33.4
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 95860 CMS LCD: Billing and Coding: Nerve Conduction Studies and Electromyography CMS LCD
- 95874 CMS LCD: Billing and Coding: Nerve Conduction Studies and Electromyography CMS LCD
- 95937 CMS LCD: Billing and Coding: Nerve Conduction Studies and Electromyography CMS LCD
- G0255 CMS LCD: Billing and Coding: Nerve Conduction Studies and Electromyography CMS LCD
- 95861 CMS LCD: Billing and Coding: Nerve Conduction Studies and Electromyography CMS LCD
- 95913 CMS LCD: Billing and Coding: Nerve Conduction Studies and Electromyography CMS LCD
- 95887 CMS LCD: Billing and Coding: Nerve Conduction Studies and Electromyography CMS LCD
- 95863 CMS LCD: Billing and Coding: Nerve Conduction Studies and Electromyography CMS LCD
- 95873 CMS LCD: Billing and Coding: Nerve Conduction Studies and Electromyography CMS LCD
- 95909 CMS LCD: Billing and Coding: Nerve Conduction Studies and Electromyography CMS LCD
Convert D33.4 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| D33.4 | 2253 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To D33.4
Other codes in section D10-D36 (Benign neoplasms, except benign neuroendocrine tumors).
ICD-10 D33.4, Billing FAQ
Is ICD-10 code D33.4 billable? +
Yes, D33.4 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Does D33.4 affect Medicare Advantage HCC risk adjustment? +
Yes. D33.4 maps to CMS-HCC v28 category 12. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What CPT codes are commonly billed with D33.4? +
Procedures frequently paired with D33.4 include: 95860, 95874, 95937, G0255, 95861.
What ICD-9 codes does D33.4 map to? +
Per CMS GEMs, D33.4 maps to ICD-9 codes: 2253. Useful for legacy data review and historical claim analysis.
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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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