Gregory S. Allen, MD
Family Medicine Physician · Mesa, AZ
Gregory S. Allen, MD is a family medicine physician with a practice address in Mesa, Arizona, and NPI 1952380925, issued on Jan 10, 2006. Check the license (Arizona 36540, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory S. Allen
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 36540 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 7233 E Baseline RD Ste 123, Mesa, AZ 85209
- Phone
- (480) 832-7546
- Enumerated
- Jan 10, 2006
- Record last updated
- Apr 3, 2024
- Fax
- (480) 924-6892
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,119 in Arizona → Look up another NPI →
Also registered at 7233 E Baseline RD Ste 123
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lari Ryan, APRNFamily Nurse Practitioner1164341731
Verify Gregory S. Allen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 36540Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% more Medicare Part D claims than the average family medicine physician in 2024
4,209 Medicare Part D claims for 496 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 64 claims were for opioids.
Most prescribed
- Levothyroxine Sodium187 claims
- Atorvastatin Calcium154 claims
- Lisinopril136 claims
- Liothyronine Sodium133 claims
- Methylprednisolone109 claims
- Azithromycin104 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.
Gregory S. Allen among 3,119 family medicine physician records in Arizona
Gregory S. Allen, MD is one of 3,119 family 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 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2024 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
194 family medicine physician records list a practice address in Mesa
They are 194 of the 9,151 NPPES records with a practice address in Mesa, and 3,119 family medicine physician records in Arizona.
All 3,119 in Arizona → Every provider in Mesa → Family Medicine Physician nationwide →
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- Bradley Downing, DOMesa, AZ 852091164414116
- Justin Dufner, D.O.Mesa, AZ 852091457619371
- Dana Farris, MDMesa, AZ 852091033214200
- Monika Herdzik, MDMesa, AZ 852091730386186
- William Lawless, MDMesa, AZ 852091316927098
- Thomas Lyon, MDMesa, AZ 852091285614677
Common questions
What is Gregory S. Allen, MD's NPI number?
Gregory S. Allen, MD's National Provider Identifier (NPI) is 1952380925, issued on Jan 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory S. Allen, MD located?
The NPPES record lists a practice address at 7233 E Baseline RD Ste 123, Mesa, AZ, 85209. Phone: (480) 832-7546. Providers update this record themselves, so call before visiting.
How can I verify Gregory S. Allen, MD's license?
NPPES lists Arizona license number 36540, 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 Gregory S. Allen, MD prescribe under Medicare Part D?
In 2024, Gregory S. Allen, MD had 4,209 Medicare Part D claims for 496 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.