Matthew Ian Gembala, M.D., M.P.H.
Nephrology Physician · Flagstaff, AZ
Matthew Ian Gembala, M.D., M.P.H. is a nephrology physician with a practice address in Flagstaff, Arizona, and NPI 1114950185, issued on Jul 10, 2006. Check the license (Arizona 35737, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Matthew Ian Gembala
- Credential
- M.D., M.P.H.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 35737 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 2201 N Vickey St Ste 110, Flagstaff, AZ 86004
- Phone
- (928) 213-9460
- Enumerated
- Jul 10, 2006
- Record last updated
- Oct 29, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (928) 213-9465
- Medicaid ID
- 1114950185-01 AZ
- Medicare enrollment
- Enrolled (PECOS I20070904000709); accepts Medicare assignment
- Medical or professional school
- University Of Arizona College Of Medicine, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 278 in Arizona → Look up another NPI →
Also registered at 2201 N Vickey St Ste 110
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ang Chen, M.D.Nephrology Physician1497852404
- Jessie Gould, ACNPC-AGAcute Care Nurse Practitioner1710679931
- Harnath Singh, M.D.Nephrology Physician1538133236
Verify Matthew Ian Gembala in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 35737Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% fewer Medicare Part D claims than the average nephrology physician in 2024
1,158 Medicare Part D claims for 213 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Losartan Potassium103 claims
- Allopurinol70 claims
- Amlodipine Besylate62 claims
- Furosemide61 claims
- Lisinopril58 claims
- Chlorthalidone48 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $649.24
29 payments; by number, the most common kind was food and beverage; the largest payer was Otsuka America Pharmaceutical, Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Akdhc LLCCottonwood, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew Ian Gembala among 278 nephrology physician records in Arizona
Matthew Ian Gembala, M.D., M.P.H. is one of 278 nephrology physician records with a practice address in Arizona. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 23% of them.
- NPI issued2006 · 23% of these records are older, 51% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated2003 · median 2001 among the 229 with a school on file
- Record last updated2019 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Arizona
There are 278 nephrology physician records in Arizona.
All 278 in Arizona → Every provider in Flagstaff → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Ang Chen, M.D.Flagstaff, AZ 860041497852404
- Harnath Singh, M.D.Flagstaff, AZ 860041538133236
- Wei Xiang WongFlagstaff, AZ 860011639551526
- Robert Seaton, M.D.Show Low, AZ 859011942207246
- Daniel Castro Pereira, M.D.Tucson, AZ 857451912212390
- Barry Krieble, M.D.Tucson, AZ 857451740287218
- Anil Nabha, MDTucson, AZ 857451558547562
- Jessica Nino Mojica, MDTucson, AZ 857451922584796
Common questions
What is Matthew Ian Gembala, M.D., M.P.H.'s NPI number?
Matthew Ian Gembala, M.D., M.P.H.'s National Provider Identifier (NPI) is 1114950185, issued on Jul 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Matthew Ian Gembala, M.D., M.P.H. located?
The NPPES record lists a practice address at 2201 N Vickey St Ste 110, Flagstaff, AZ, 86004. Phone: (928) 213-9460. Providers update this record themselves, so call before visiting.
How can I verify Matthew Ian Gembala, M.D., M.P.H.'s license?
NPPES lists Arizona license number 35737, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Matthew Ian Gembala, M.D., M.P.H. prescribe under Medicare Part D?
In 2024, Matthew Ian Gembala, M.D., M.P.H. had 1,158 Medicare Part D claims for 213 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.