James Gunn, M.D.
NPI 1255643680 · Family Medicine Physician · Mesa, AZ
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Gunn, M.D. is a Family Medicine Physician provider in Mesa, AZ (NPI 1255643680).
Provider details
- NPI number
- 1255643680
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 47378 (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
15 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
2,228 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 654 | $123 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 394 | $88 |
| Annual Alcohol Misuse Screening, 5 to 15 MinutesG0442 | 298 | $18 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 257 | $18 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 256 | $125 |
| Administration of Influenza Virus VaccineG0008 | 53 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 142 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 624 | 188 |
| Levothyroxine Sodium | 592 | 180 |
| Metformin Hcl | 524 | 168 |
| Lisinopril | 500 | 152 |
| Losartan Potassium | 385 | 111 |
| Rosuvastatin Calcium | 325 | 113 |
| Amlodipine Besylate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,343 across 135 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
- 2010-07-14
- Last updated
- 2022-06-21
- Certified
- 2022-06-21
Frequently asked questions
- What is James Gunn's NPI number?
- James Gunn's National Provider Identifier (NPI) is 1255643680, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Gunn's specialty?
- James Gunn is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Gunn located?
- James Gunn's practice location on file with NPPES is 1425 S Greenfield Rd Ste 101, Mesa, AZ 85206-5505.
- What is James Gunn's phone number?
- The practice phone number listed in the NPPES registry for James Gunn is (480) 964-5800.
- Does James Gunn accept Medicare?
- James Gunn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Gunn's NPI active?
- Yes — James Gunn's NPI (1255643680) is active in the NPPES registry as of the last update on 2022-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.