Icd 10 code for acute non intractable headache unspecified July 8, 2019 16 32 64 128 Icd 10 code for acute non intractable headache unspecified headache type Icd 10 cm code for acute non intractable headache unspecified headache type Headache icd 9 code Acute headache icd 10 Headache nos icd 10