Robert Thomas Stoffer, MD
Internal Medicine Physician · Phoenix, AZ
Robert Thomas Stoffer, MD is an internal medicine physician with a practice address in Phoenix, Arizona, and NPI 1538123427, issued on Apr 17, 2006. Check the license (Arizona 10355, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Robert Thomas Stoffer
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 10355 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 3201 W Peoria Ave, Phoenix, AZ 85029
- Phone
- (602) 993-1773
- Enumerated
- Apr 17, 2006
- Record last updated
- Oct 20, 2023
- Fax
- (602) 993-1323
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
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Verify Robert Thomas Stoffer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 10355Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,041 Medicare Part D claims for 201 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Lisinopril109 claims
- Losartan Potassium88 claims
- Rosuvastatin Calcium85 claims
- Amlodipine Besylate79 claims
- Atorvastatin Calcium76 claims
- Metformin Hcl73 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.
Robert Thomas Stoffer among 2,853 internal medicine physician records in Arizona
Robert Thomas Stoffer, MD is one of 2,853 internal medicine physician records with a practice address in Arizona. 75% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2023 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
695 internal medicine physician records list a practice address in Phoenix
They are 695 of the 31,399 NPPES records with a practice address in Phoenix, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Phoenix → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ima Alamoradi, M.D.Phoenix, AZ 850291669426110
- Imad Bouakl, M.D.Phoenix, AZ 850291154390565
- Ricardo Cestero, M.D.Phoenix, AZ 850291023216835
- Hemang Gandhi, M.D.Phoenix, AZ 850291467560565
- Jason Gittman, M.D.Phoenix, AZ 850291255469599
- Eugene Guerrero, M.D.Phoenix, AZ 850291760450571
- Ilya Katz, D.O.Phoenix, AZ 850291104026319
- Jack Schafer, M.D.Phoenix, AZ 850291275590671
Common questions
What is Robert Thomas Stoffer, MD's NPI number?
Robert Thomas Stoffer, MD's National Provider Identifier (NPI) is 1538123427, issued on Apr 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Thomas Stoffer, MD located?
The NPPES record lists a practice address at 3201 W Peoria Ave, Phoenix, AZ, 85029. Phone: (602) 993-1773. Providers update this record themselves, so call before visiting.
How can I verify Robert Thomas Stoffer, MD's license?
NPPES lists Arizona license number 10355, 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 Robert Thomas Stoffer, MD prescribe under Medicare Part D?
In 2024, Robert Thomas Stoffer, MD had 2,041 Medicare Part D claims for 201 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.