James Duffy, MD
NPI 1174695266 · Internal Medicine Physician · Gaithersburg, MD
Enrolled with Medicare as Practitioner - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Duffy, MD is a Internal Medicine Physician provider in Gaithersburg, MD (NPI 1174695266).
Provider details
- NPI number
- 1174695266
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD30607 (DC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 45 | 14 |
| Atorvastatin Calcium | 38 | 25 |
| Metformin Hcl | 37 | — |
| Levothyroxine Sodium | 26 | — |
| Amlodipine Besylate | 23 | — |
| Lisinopril | 23 | — |
| Isosorbide Mononitrate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-14
- Last updated
- 2014-09-20
Frequently asked questions
- What is James Duffy's NPI number?
- James Duffy's National Provider Identifier (NPI) is 1174695266, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Duffy's specialty?
- James Duffy is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Duffy located?
- James Duffy's practice location on file with NPPES is 7 Metropolitan Ct, Gaithersburg, MD 20878-4016.
- What is James Duffy's phone number?
- The practice phone number listed in the NPPES registry for James Duffy is (240) 773-0300.
- Does James Duffy accept Medicare?
- James Duffy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Duffy's NPI active?
- Yes — James Duffy's NPI (1174695266) is active in the NPPES registry as of the last update on 2014-09-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.