John Delfs, M.D.
NPI 1144521709 · Internal Medicine Physician · Woodside, NY
John Delfs, M.D. is a Internal Medicine Physician provider in Woodside, NY (NPI 1144521709).
Provider details
- NPI number
- 1144521709
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 252533 (NY)
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
15 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
- 2010-11-12
- Last updated
- 2018-06-11
Frequently asked questions
- What is John Delfs's NPI number?
- John Delfs's National Provider Identifier (NPI) is 1144521709, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Delfs's specialty?
- John Delfs is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Delfs located?
- John Delfs's practice location on file with NPPES is 61-10 Queens Boulevard, Woodside, NY 11377.
- What is John Delfs's phone number?
- The practice phone number listed in the NPPES registry for John Delfs is (718) 397-2002.
- Is John Delfs's NPI active?
- Yes — John Delfs's NPI (1144521709) is active in the NPPES registry as of the last update on 2018-06-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.