Quick answers
- Does Donald W. Simpson Ii Ii accept Medicare assignment?
- Yes. Medicare's clinician data says Donald W. Simpson Ii Ii accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Donald W. Simpson Ii Ii's NPI number?
- 1275916207. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Donald W. Simpson Ii Ii is enrolled with Medicare (CMS data updated October 2, 2026).
- 599 Farrington Hwy, Unit 100Kapolei, HI 96707 (808) 697‑3800
- 86-260 Farringtion HwyWaianae, HI 96792 (808) 697‑3300
- 86-260 Farringtion Hwy, Attn Mj Cadwell CredentialingWaianae, HI 96792
- 909 Alameda StNorman, OK 73071 (405) 360‑5100
Group practices
Medicare enrollment lists Donald W. Simpson Ii Ii as a member of these groups (CMS data updated October 2, 2026).
- Waianae District Comprehensive Health and Hospital Board Incorporated162 clinicians in the group
- State of Oklahoma97 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Hawaii
Clinicians with the same Medicare primary specialty in Hawaii — not a recommendation.
Other clinicians in Waianae District Comprehensive Health and Hospital Board Incorporated
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1275916207 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians