2027 ICD-10-CM Diagnosis Code G44.41Drug-induced headache, not elsewhere classified, intractable
ICD-10-CM Codes›G00–G99›G40-G47›G44
- Billable — Valid for Submission
- Not Chronic
G44.41 is a billable ICD-10-CM diagnosis code for drug-induced headache, not elsewhere classified, intractable. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 102 through 103. Coders also document this condition as headache caused by drug. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Drug induced or toxic related condition and Headache; including migraine.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Headache caused by drug
- Intractable headache caused by drug
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G44.41: its own notes plus those printed at G44.4, G44, and Chapter 6. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name G44.41, its category, or a range that includes it.
Excludes2 4
These codes carry an Excludes2 note naming G44.41: its condition is not part of those codes, and both may be reported when the patient has both.
- G43 Migraineheadache syndromes (G44.-) names G44.-, which includes this code
- G44.1 Vascular headache, not elsewhere classifieddrug-induced headache (G44.4-) names G44.4-, which includes this code
- G89 Pain, not elsewhere classifiedheadache syndromes (G44.-) names G44.-, which includes this code
- R51 Headache
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
intractable G44.41
intractable G44.41
intractable G44.41
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Drug Reactions
Most of the time, medicines make our lives better. They reduce aches and pains, fight infections, and control problems such as high blood pressure or diabetes. But medicines can also cause unwanted reactions, such as drug interactions, side effects, and allergies.
The full article covers:
- What is a drug interaction?
- What are side effects?
- What are drug allergies?
- How can I stay safe when taking medicines?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert G44.41 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G44.41Overview
What is the ICD-10 code for drug-induced headache, not elsewhere classified, intractable?
The ICD-10-CM code for drug-induced headache, not elsewhere classified, intractable is G44.41 (sometimes written as G4441). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is G44.41 (Drug-induced headache, not elsewhere classified) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report drug-induced headache, not elsewhere classified, intractable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does G44.41 group to?
When drug-induced headache, not elsewhere classified, intractable is the principal diagnosis on an inpatient stay, it groups to MS-DRG 102, 103, with relative weights from 0.8219 to 1.1200 depending on complications. Higher weights mean higher Medicare reimbursement.
Can G44.41 be reported with R51.9?
Not as a rule. The Excludes1 note at G44, which applies to G44.41, lists "headache NOS (R51.9)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
