Phillip Alexander Williams, MD
NPI 1437143716ActiveIndividual· Obstetrics & Gynecology· Flagstaff, AZ
Obstetrics & Gynecology (MD) in Flagstaff, Arizona, trained at University of Utah School of Medicine (class of 1992). 294 Medicare patients in 2024, $53,016 paid; nearly all of their 330 Part D prescriptions were generic (93%). Organon LLC was the largest of 4 companies reporting payments in 2025, $86.42 in all, mostly food and beverage.
Overview
| NPI | 1437143716 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 1, 2005 |
| Last updated in NPPES | Jul 15, 2026 |
| Certified by provider | Jul 15, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 25398 | AZ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Obstetrics/Gynecology (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 294 |
|---|---|
| Services billed | 849 across 30 procedure codes |
| Paid by Medicare | $53,016 |
Part D prescriptions in 2024
| Prescriptions (claims) | 330 · 860 30-day fills |
|---|---|
| Patients | 142 |
| Total drug cost | $26,267 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | University of Utah School of Medicine |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Obstetrics/Gynecology |
| Telehealth | Offers telehealth |
Medical groups
- Northern Arizona Healthcare CorporationFlagstaff, AZ · 385 clinicians
- Genesis OB GYN PLLCOro Valley, AZ · 110 clinicians
Hospital affiliations
- Flagstaff Medical CenterFlagstaff, AZ
- Verde Valley Medical CenterCottonwood, AZ
Industry payments (Open Payments)
- 2025$86.42 · 4 payments from 4 companies
- 2024$185.69 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Organon LLC | $28.23 | 1 |
| Merck Sharp & Dohme LLC | $22.12 | 1 |
| Bayer Healthcare Pharmaceuticals Inc. | $21.18 | 1 |
| Amgen Inc. | $14.89 | 1 |
What the 2025 payments were for
- Food and Beverage$86.42 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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