G43.C1 Periodic headache syndromes in child or adult, intractable
Instructional Notes:
G43.C1 Description: Periodic headache syndromes in child or adult, intractable Inclusion Term:
Periodic headache syndromes in child or adult, with refractory migraine
↓
G43.C Description: Periodic headache syndromes in child or adult ↓
G43 Description: Migraine Exclude1:
headache NOS (R51.9)
lower half migraine (G44.00)
Exclude2:
headache syndromes (G44.-)
Notes:
the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled
Use Additional Code:
code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
↓
G40-G47 Description: Episodic and paroxysmal disorders (G40-G47) ↓
G00-G99 Description: Diseases of the nervous system Exclude2:
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)