Matthew Ian Gembala, M.D., M.P.H.
NPI 1114950185ActiveIndividual· Internal Medicine, Nephrology· Flagstaff, AZ
Internal Medicine, Nephrology (M.D., M.P.H.) in Flagstaff, Arizona, trained at University of Arizona College of Medicine (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $260,935 for 1,158 claims, against $116,709 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 10 companies reporting payments in 2025, $614.14 in all, mostly food and beverage.
Overview
| NPI | 1114950185 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., M.P.H. |
| Sole proprietor | No |
| NPI issued | Jul 10, 2006 |
| Last updated in NPPES | Oct 29, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 35737 | AZ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 441 |
|---|---|
| Services billed | 1,257 across 16 procedure codes |
| Paid by Medicare | $116,709 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,158 · 2,820 30-day fills |
|---|---|
| Patients | 213 |
| Total drug cost | $260,935 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of Arizona College of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical group
- Akdhc LLCGlendale, AZ · 129 clinicians
Hospital affiliations
- Flagstaff Medical CenterFlagstaff, AZ
- Havasu Regional Medical CenterLake Havasu City, AZ
- Little Colorado Medical CenterWinslow, AZ
- Valley View Medical CenterFort Mohave, AZ
- Western Arizona Regional Medical CenterBullhead City, AZ
Other facilities
- 032536 Winslow Dialysis Center (Fmc)Dialysis facility · Winslow, AZ
- 032558 Bullhead City Dialysis (Fmc)Dialysis facility · Bullhead City, AZ
- Usrc FlagstaffDialysis facility · Flagstaff, AZ
Industry payments (Open Payments)
- 2025$614.14 · 27 payments from 10 companies
- 2024$649.24 · 29 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $169.70 | 9 |
| Otsuka America Pharmaceutical, Inc. | $162.74 | 6 |
| Akebia Therapeutics Inc | $85.90 | 4 |
| Amgen Inc. | $45.37 | 2 |
| Chiesi USA, Inc. | $33.48 | 1 |
What the 2025 payments were for
- Food and Beverage$614.14 · 27 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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