Instruction Source: G44.1
Vascular headache, not elsewhere classified
Excludes 2 (Not Included Here)
- 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-)
Instruction Source: G44
Other headache syndromes
Excludes 1 (Mutually Exclusive)
Excludes 2 (Not Included Here)
- atypical facial pain (G50.1)
- headache due to lumbar puncture (G97.1)
- migraines (G43.-)
- trigeminal neuralgia (G50.0)
Instruction Source: G40-G47
Episodic and paroxysmal disorders (G40-G47)
Instruction Source: G00-G99
Diseases of the nervous system
Excludes 2 (Not Included Here)
- 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)