DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

G44 Other headache syndromes

  • Header · not billable

G44 is not billable. The category heads 40 billable codes in FY2027, grouped under 7 subdivisions.

ICD-10 code by name

What is the ICD-10 code for tension headache?
Tension headache ICD-10 code: G44.209 Tension-type headache, unspecified, not intractable. Alphabetic Index: Tensionheadache → G44.209. Search ICD-10 for tension headache
What is the ICD-10 code for cervicogenic headache?
Cervicogenic headache ICD-10 code: G44.86 Cervicogenic headache. Search ICD-10 for cervicogenic headache
What is the ICD-10 code for post-traumatic headache?
Post-traumatic headache ICD-10 code: G44.309 Post-traumatic headache, unspecified, not intractable. Alphabetic Index: Headachepost-traumatic → G44.309. Search ICD-10 for post-traumatic headache
What is the ICD-10 code for cluster headache?
Cluster headache ICD-10 code: G44.009 Cluster headache syndrome, unspecified, not intractable. Alphabetic Index: Headachecluster → G44.009. Search ICD-10 for cluster headache
What is the ICD-10 code for tension type headache?
Tension type headache ICD-10 code: G44.209 Tension-type headache, unspecified, not intractable. Alphabetic Index: Headachetension (-type) → G44.209. Search ICD-10 for tension type headache

Where it sits

  1. Chapter 6 Diseases of the nervous system (G00-G99)
  2. G40-G47 Episodic and paroxysmal disorders (G40-G47)
  3. G44 Other headache syndromes
Billable codes
40
Subdivisions
7
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
107

Codes in G44

  1. G44.0
    Cluster headaches and other trigeminal autonomic cephalgias (TAC)
    Header
  2. G44.00
    Cluster headache syndrome, unspecified
    Header
    Inclusion terms 5

    Inclusion terms

    • Ciliary neuralgia
    • Cluster headache NOS
    • Histamine cephalgia
    • Lower half migraine
    • Migrainous neuralgia
  3. G44.001
    Cluster headache syndrome, unspecified, intractable
    Billable
  4. G44.009
    Cluster headache syndrome, unspecified, not intractable
    Billable
    Inclusion terms 1

    Inclusion terms

    • Cluster headache syndrome NOS
  5. G44.01
    Episodic cluster headache
    Header
  6. G44.011
    Episodic cluster headache, intractable
    Billable
  7. G44.019
    Episodic cluster headache, not intractable
    Billable
    Inclusion terms 1

    Inclusion terms

    • Episodic cluster headache NOS
  8. G44.02
    Chronic cluster headache
    Header
  9. G44.021
    Chronic cluster headache, intractable
    Billable
  10. G44.029
    Chronic cluster headache, not intractable
    Billable
    Inclusion terms 1

    Inclusion terms

    • Chronic cluster headache NOS
  11. G44.03
    Episodic paroxysmal hemicrania
    Header
    Inclusion terms 1

    Inclusion terms

    • Paroxysmal hemicrania NOS
  12. G44.031
    Episodic paroxysmal hemicrania, intractable
    Billable
  13. G44.039
    Episodic paroxysmal hemicrania, not intractable
    Billable
    Inclusion terms 1

    Inclusion terms

    • Episodic paroxysmal hemicrania NOS
  14. G44.04
    Chronic paroxysmal hemicrania
    Header
  15. G44.041
    Chronic paroxysmal hemicrania, intractable
    Billable
  16. G44.049
    Chronic paroxysmal hemicrania, not intractable
    Billable
    Inclusion terms 1

    Inclusion terms

    • Chronic paroxysmal hemicrania NOS
  17. G44.05
    Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)
    Header
  18. G44.051
    Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable
    Billable
  19. G44.059
    Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable
    Billable
    Inclusion terms 1

    Inclusion terms

    • Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT) NOS
  20. G44.09
    Other trigeminal autonomic cephalgias (TAC)
    Header
  21. G44.091
    Other trigeminal autonomic cephalgias (TAC), intractable
    Billable
  22. G44.099
    Other trigeminal autonomic cephalgias (TAC), not intractable
    Billable
  23. G44.1
    Vascular headache, not elsewhere classified
    Billable
    Excludes2 7

    Excludes2

    • cluster headache (G44.0) G44.0
    • complicated headache syndromes (G44.5-) G44.5
    • drug-induced headache (G44.4-) G44.4
    • migraine (G43.-) G43
    • other specified headache syndromes (G44.8-) G44.8
    • post-traumatic headache (G44.3-) G44.3
    • tension-type headache (G44.2-) G44.2
  24. G44.2
    Tension-type headache
    Header
  25. G44.20
    Tension-type headache, unspecified
    Header
  26. G44.201
    Tension-type headache, unspecified, intractable
    Billable
  27. G44.209
    Tension-type headache, unspecified, not intractable
    Billable
    Inclusion terms 1

    Inclusion terms

    • Tension headache NOS
  28. G44.21
    Episodic tension-type headache
    Header
  29. G44.211
    Episodic tension-type headache, intractable
    Billable
  30. G44.219
    Episodic tension-type headache, not intractable
    Billable
    Inclusion terms 1

    Inclusion terms

    • Episodic tension-type headache NOS
  31. G44.22
    Chronic tension-type headache
    Header
  32. G44.221
    Chronic tension-type headache, intractable
    Billable
  33. G44.229
    Chronic tension-type headache, not intractable
    Billable
    Inclusion terms 1

    Inclusion terms

    • Chronic tension-type headache NOS
  34. G44.3
    Post-traumatic headache
    Header
  35. G44.30
    Post-traumatic headache, unspecified
    Header
  36. G44.301
    Post-traumatic headache, unspecified, intractable
    Billable
  37. G44.309
    Post-traumatic headache, unspecified, not intractable
    Billable
    Inclusion terms 1

    Inclusion terms

    • Post-traumatic headache NOS
  38. G44.31
    Acute post-traumatic headache
    Header
  39. G44.311
    Acute post-traumatic headache, intractable
    Billable
  40. G44.319
    Acute post-traumatic headache, not intractable
    Billable
    Inclusion terms 1

    Inclusion terms

    • Acute post-traumatic headache NOS
  41. G44.32
    Chronic post-traumatic headache
    Header
  42. G44.321
    Chronic post-traumatic headache, intractable
    Billable
  43. G44.329
    Chronic post-traumatic headache, not intractable
    Billable
    Inclusion terms 1

    Inclusion terms

    • Chronic post-traumatic headache NOS
  44. G44.4
    Drug-induced headache, not elsewhere classified
    Header
    Inclusion terms 1, Use additional code 1

    Inclusion terms

    • Medication overuse headache

    Use additional code

    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) T36 T50
  45. G44.40
    Drug-induced headache, not elsewhere classified, not intractable
    Billable
  46. G44.41
    Drug-induced headache, not elsewhere classified, intractable
    Billable
  47. G44.5
    Complicated headache syndromes
    Header
  48. G44.51
    Hemicrania continua
    Billable
  49. G44.52
    New daily persistent headache (NDPH)
    Billable
  50. G44.53
    Primary thunderclap headache
    Billable
  51. G44.59
    Other complicated headache syndrome
    Billable
  52. G44.8
    Other specified headache syndromes
    Header
    Excludes2 1

    Excludes2

    • headache with orthostatic or positional component, not elsewhere classified (R51.0) R51.0
  53. G44.81
    Hypnic headache
    Billable
  54. G44.82
    Headache associated with sexual activity
    Billable
    Inclusion terms 2

    Inclusion terms

    • Orgasmic headache
    • Preorgasmic headache
  55. G44.83
    Primary cough headache
    Billable
  56. G44.84
    Primary exertional headache
    Billable
  57. G44.85
    Primary stabbing headache
    Billable
  58. G44.86
    Cervicogenic headache
    Billable
    Code also 1

    Code also

    • associated cervical spinal condition, if known
  59. G44.89
    Other headache syndrome
    Billable

Sources of each column.

Instructions

At G44

Excludes1

  • headache NOS (R51.9) R51.9

Excludes2

  • atypical facial pain (G50.1) G50.1
  • headache due to lumbar puncture (G97.1) G97.1
  • migraines (G43.-) G43
  • trigeminal neuralgia (G50.0) G50.0

Notes that also apply

Chapter 6 instructions (Excludes2 8): printed on the chapter 6 page.

Index entries

  • SUNCT (short lasting unilateral neuralgiform headache with conjunctival injection and tearing) → G44.059
  • Horton's headache or neuralgia → G44.099
  • TAC (trigeminal autonomic cephalgia) NEC → G44.099
  • Sluder's neuralgia (syndrome) → G44.89
  • Cephalgia, cephalalgiahistamine → G44.009
  • Headachecluster → G44.009
  • Headachehistamine → G44.009
  • Neuralgia, neuralgic (acute)ciliary → G44.009
  • Neuralgia, neuralgic (acute)migrainous → G44.009
  • Syndromecluster headache → G44.009
  • Hemicraniaparoxysmal → G44.039
  • SUNCT (short lasting unilateral neuralgiform headache with conjunctival injection and tearing)intractable → G44.051
  • Headacheneuralgiform, short lasting unilateral, with conjunctival injection and tearing (SUNCT) → G44.059
  • Headacheshort lasting unilateral neuralgiform, with conjunctival injection and tearing (SUNCT) → G44.059
  • SUNCT (short lasting unilateral neuralgiform headache with conjunctival injection and tearing)not intractable → G44.059
  • Horton's headache or neuralgiaintractable → G44.091
  • TAC (trigeminal autonomic cephalgia) NECintractable → G44.091
  • Cephalgia, cephalalgiatrigeminal autonomic (TAC) NEC → G44.099
  • Horton's headache or neuralgianot intractable → G44.099
  • Neuralgia, neuralgic (acute)Horton's → G44.099
  • TAC (trigeminal autonomic cephalgia) NECnot intractable → G44.099
  • Headachevascular NEC → G44.1
  • Headachetension (-type) → G44.209
  • Tensionheadache → G44.209
  • Headachepost-traumatic → G44.309
  • Headachedrug-induced NEC → G44.40
  • Headachemedication overuse → G44.40
  • Headacherebound → G44.40
  • Hemicraniacontinua → G44.51
  • Headachenew daily persistent (NDPH) → G44.52
  • Headachethunderclap (primary) → G44.53
  • Headachehypnic → G44.81
  • Headacheassociated with sexual activity → G44.82
  • Headacheorgasmic → G44.82
  • Headachepreorgasmic → G44.82
  • Headachecough (primary) → G44.83
  • Headacheexertional (primary) → G44.84
  • Headachestabbing (primary) → G44.85
  • Headachecervicogenic → G44.86
  • Headacheallergic NEC → G44.89

67 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy