Frantz Duffoo, M.D.
NPI 1669544953 · Nephrology Physician · Middletown, NY
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frantz Duffoo, M.D. is a Nephrology Physician provider in Middletown, NY (NPI 1669544953).
Provider details
- NPI number
- 1669544953
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 25MA09969100 (NJ)
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-14
- Last updated
- 2023-11-27
- Certified
- 2020-07-23
Frequently asked questions
- What is Frantz Duffoo's NPI number?
- Frantz Duffoo's National Provider Identifier (NPI) is 1669544953, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frantz Duffoo's specialty?
- Frantz Duffoo is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Frantz Duffoo located?
- Frantz Duffoo's practice location on file with NPPES is 707 E Main St, Middletown, NY 10940-2650.
- What is Frantz Duffoo's phone number?
- The practice phone number listed in the NPPES registry for Frantz Duffoo is (845) 333-7575.
- Does Frantz Duffoo accept Medicare?
- Frantz Duffoo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frantz Duffoo's NPI active?
- Yes — Frantz Duffoo's NPI (1669544953) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.