ICD-10 G44.1
Billable / SpecificVascular headache, not elsewhere classified
About ICD-10-CM G44.1
ICD-10-CM code G44.1 represents Vascular headache, not elsewhere classified. This is a billable/specific code in the Nervous System chapter (block G44). The 2026 edition of ICD-10-CM G44.1 became effective on October 1, 2025.
Type 2 Excludes
Not included here, the excluded code is not part of G44.1, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- cluster headache (G44.0)
- complicated headache syndromes (G44.5-)
- drug-induced headache (G44.4-)
- migraine (G43.-)
- other specified headache syndromes (G44.8-)
- post-traumatic headache (G44.3-)
- tension-type headache (G44.2-)
Medicare LCD Coverage for G44.1
Local Coverage Determinations (LCDs) from CMS MACs that list G44.1 as a covered diagnosis.
Showing top 10 of 152 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing G44.1.
2 Aetna
2 Cigna
5 Medicare
CPT Codes Commonly Billed with G44.1
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 98943 CMS LCD: Billing and Coding: Chiropractic Services CMS LCD
Convert G44.1 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 |
|---|---|---|
| G44.1 | 7840 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To G44.1
Other codes in section G40-G47 (Episodic and paroxysmal disorders).
ICD-10 G44.1, Billing FAQ
Is ICD-10 code G44.1 billable? +
Yes, G44.1 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What codes are Type 2 Excludes for G44.1? +
Type 2 Excludes (may be coded together when both conditions exist): cluster headache (G44.0); complicated headache syndromes (G44.5-); drug-induced headache (G44.4-)
What CPT codes are commonly billed with G44.1? +
Procedures frequently paired with G44.1 include: 98943.
What ICD-9 codes does G44.1 map to? +
Per CMS GEMs, G44.1 maps to ICD-9 codes: 7840. 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 July 16, 2026.
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