Frank Duan, MD
NPI 1679214399 · Internal Medicine Physician · New York, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frank Duan, MD is a Internal Medicine Physician provider in New York, NY (NPI 1679214399).
Provider details
- NPI number
- 1679214399
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 337296 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 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 |
|---|---|---|
| Atorvastatin Calcium | 29 | 11 |
| Levothyroxine Sodium | 23 | — |
| Amlodipine Besylate | 22 | — |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 21 | — |
| Furosemide | 20 | — |
| Lisinopril | 20 | — |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-04-05
- Last updated
- 2025-10-28
- Certified
- 2025-10-28
Frequently asked questions
- What is Frank Duan's NPI number?
- Frank Duan's National Provider Identifier (NPI) is 1679214399, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frank Duan's specialty?
- Frank Duan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Frank Duan located?
- Frank Duan's practice location on file with NPPES is 234 E 85th St, New York, NY 10028-3001.
- What is Frank Duan's phone number?
- The practice phone number listed in the NPPES registry for Frank Duan is (212) 241-6585.
- Does Frank Duan accept Medicare?
- Frank Duan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frank Duan's NPI active?
- Yes — Frank Duan's NPI (1679214399) is active in the NPPES registry as of the last update on 2025-10-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.