Matthew Gembala, M.D., M.P.H.
NPI 1114950185 · Nephrology Physician · Flagstaff, AZ
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Gembala, M.D., M.P.H. is a Nephrology Physician provider in Flagstaff, AZ (NPI 1114950185).
Provider details
- NPI number
- 1114950185
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., M.P.H.
- Sex
- Male
- Sole proprietor
- No
- License
- 35737 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
932 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 618 | $173 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 77 | $212 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 75 | $107 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 61 | $125 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 27 | $16 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 103 | 33 |
| Allopurinol | 70 | 23 |
| Amlodipine Besylate | 62 | 24 |
| Furosemide | 61 | 21 |
| Lisinopril | 58 | 20 |
| Chlorthalidone | 48 | 13 |
| Sevelamer Carbonate | 45 | — |
| Febuxostat |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$649 across 29 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-10
- Last updated
- 2019-10-29
Frequently asked questions
- What is Matthew Gembala's NPI number?
- Matthew Gembala's National Provider Identifier (NPI) is 1114950185, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Gembala's specialty?
- Matthew Gembala is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Gembala located?
- Matthew Gembala's practice location on file with NPPES is 2201 N Vickey St Ste 110, Flagstaff, AZ 86004-6126.
- What is Matthew Gembala's phone number?
- The practice phone number listed in the NPPES registry for Matthew Gembala is (928) 213-9460.
- Does Matthew Gembala accept Medicare?
- Matthew Gembala is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Gembala's NPI active?
- Yes — Matthew Gembala's NPI (1114950185) is active in the NPPES registry as of the last update on 2019-10-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.