NPPES file of Aug 9, 2026

James A. Gunn, M.D.

Family Medicine Physician · Mesa, AZ

James A. Gunn, M.D. is a family medicine physician with a practice address in Mesa, Arizona, and NPI 1255643680, issued on Jul 14, 2010. Check the license (Arizona 47378, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1255643680
Name
James A. Gunn
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
47378 AZ
Self-reported in NPPES; status is on the state search
Practice location
1425 S Greenfield RD Ste 101, Mesa, AZ 85206
Phone
(480) 964-5800
Enumerated
Jul 14, 2010
Record last updated
Jun 21, 2022
Fax
(480) 644-1372
Medicaid ID
1255643680 IA
Medicare enrollment
Enrolled (PECOS I20130830000307); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest family medicine physician records → All 3,119 in Arizona → Look up another NPI →

Also registered at 1425 S Greenfield RD Ste 101

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Jamison Jones, DOFamily Medicine Physician1598226698
  2. Kendall Kokora, FNP-CFamily Nurse Practitioner1316719040
  3. Janette Lesueur, FNP-CFamily Nurse Practitioner1386359727
  4. Scott MitchellFamily Medicine Physician1376246462
  5. Mark Porvaznik, DOFamily Medicine Physician1417513474
  6. Sarah SchornackFamily Nurse Practitioner1942958699

Verify James A. Gunn in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersArizona Medical Board
    Search for license 47378    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Arizona license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

3.0 times the Medicare Part D claims of the average family medicine physician in 2024

10,669 Medicare Part D claims for 985 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 323 claims were for opioids.

  1. James Gunn10,669
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium624 claims
  2. Levothyroxine Sodium592 claims
  3. Metformin Hcl524 claims
  4. Lisinopril500 claims
  5. Losartan Potassium385 claims
  6. Rosuvastatin Calcium325 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: $2,342.97

135 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. James Gunn$2,342.97
  2. Specialty average$902.55

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

  1. Mesa Family Physicians, PLCMesa, AZ

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

James A. Gunn among 3,119 family medicine physician records in Arizona

James A. Gunn, M.D. 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 2010, is newer than 62% of them.

  • NPI issued2010 · 62% of these records are older, 36% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 57% of these records are
  • Graduated2010 · median 2006 among the 1,775 with a school on file
  • Record last updated2022 · 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 →

The 8 family medicine physician records with the nearest ZIP codes

  1. Robert Allen, M.D.Mesa, AZ 852061972538569
  2. Gary Beitler, MDMesa, AZ 852061639174493
  3. Pete Coury, MDMesa, AZ 852061598751497
  4. Rustin Crawford, D.O.Mesa, AZ 852061659419091
  5. Donna Desantis, MDMesa, AZ 852061962483727
  6. Jason Frye, D.O.Mesa, AZ 852061598700189
  7. Grace Haynes, MDMesa, AZ 852061215070792
  8. Robert Laufer, D.O.Mesa, AZ 852061205838737

Common questions

What is James A. Gunn, M.D.'s NPI number?

James A. Gunn, M.D.'s National Provider Identifier (NPI) is 1255643680, issued on Jul 14, 2010. An NPI identifies a provider in billing; it is not a license.

Where is James A. Gunn, M.D. located?

The NPPES record lists a practice address at 1425 S Greenfield RD Ste 101, Mesa, AZ, 85206. Phone: (480) 964-5800. Providers update this record themselves, so call before visiting.

How can I verify James A. Gunn, M.D.'s license?

NPPES lists Arizona license number 47378, 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 James A. Gunn, M.D. prescribe under Medicare Part D?

In 2024, James A. Gunn, M.D. had 10,669 Medicare Part D claims for 985 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.