ICD-10 G44.329
Billable / SpecificChronic post-traumatic headache, not intractable
About ICD-10-CM G44.329
ICD-10-CM code G44.329 represents Chronic post-traumatic headache, not intractable. This is a billable/specific code in the Nervous System chapter (block G44). The 2026 edition of ICD-10-CM G44.329 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under G44.329. Per CMS ICD-10-CM Tabular 2026.
- Chronic post-traumatic headache NOS
Medicare LCD Coverage for G44.329
Local Coverage Determinations (LCDs) from CMS MACs that list G44.329 as a covered diagnosis.
Showing top 10 of 26 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing G44.329.
2 Cigna
2 Medicare
CPT Codes Commonly Billed with G44.329
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 64596 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64598 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64570 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64597 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64569 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64581 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64590 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64555 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64595 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
- 64585 CMS LCD: Billing and Coding: Peripheral Nerve Stimulation CMS LCD
Convert G44.329 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 |
|---|---|---|
| G44.329 | 33922 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To G44.329
Other codes in section G40-G47 (Episodic and paroxysmal disorders).
ICD-10 G44.329, Billing FAQ
Is ICD-10 code G44.329 billable? +
Yes, G44.329 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to G44.329? +
ICD-10 G44.329 includes: Chronic post-traumatic headache NOS.
What CPT codes are commonly billed with G44.329? +
Procedures frequently paired with G44.329 include: 64596, 64598, 64570, 64597, 64569.
What ICD-9 codes does G44.329 map to? +
Per CMS GEMs, G44.329 maps to ICD-9 codes: 33922. 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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