James Diffee, MD
NPI 1518952514 · Internal Medicine Physician · Jackson, TN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Diffee, MD is a Internal Medicine Physician provider in Jackson, TN (NPI 1518952514).
Provider details
- NPI number
- 1518952514
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 11702 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
5,318 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 798 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 744 | $121 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 577 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 520 | $13 |
| Hemoglobin A1c Level83036 | 293 | $9 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 283 | $125 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 135 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 591 | 148 |
| Atorvastatin Calcium | 441 | 116 |
| Metformin Hcl | 343 | 92 |
| Omeprazole | 319 | 86 |
| Lisinopril | 278 | 61 |
| Levothyroxine Sodium | 277 | 59 |
| Rosuvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-15
- Last updated
- 2012-11-29
Frequently asked questions
- What is James Diffee's NPI number?
- James Diffee's National Provider Identifier (NPI) is 1518952514, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Diffee's specialty?
- James Diffee is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Diffee located?
- James Diffee's practice location on file with NPPES is 2863 Highway 45 Byp, Jackson, TN 38305-3618.
- What is James Diffee's phone number?
- The practice phone number listed in the NPPES registry for James Diffee is (731) 664-1375.
- Does James Diffee accept Medicare?
- James Diffee is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Diffee's NPI active?
- Yes — James Diffee's NPI (1518952514) is active in the NPPES registry as of the last update on 2012-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.