| G44.30 | Post-traumatic headache, unspecified | NON-BILLABLE CODE |
| G44.301 | Post-traumatic headache, unspecified, intractable | BILLABLE CODE |
| G44.309 | Post-traumatic headache, unspecified, not intractable | BILLABLE CODE |
| G44.31 | Acute post-traumatic headache | NON-BILLABLE CODE |
| G44.311 | Acute post-traumatic headache, intractable | BILLABLE CODE |
| G44.319 | Acute post-traumatic headache, not intractable | BILLABLE CODE |
| G44.32 | Chronic post-traumatic headache | NON-BILLABLE CODE |
| G44.321 | Chronic post-traumatic headache, intractable | BILLABLE CODE |
| G44.329 | Chronic post-traumatic headache, not intractable | BILLABLE CODE |
