Mark Kropf, M.D.
NPI 1104820018 · Internal Medicine Physician · Port Jefferson, NY
Mark Kropf, M.D. is a Internal Medicine Physician provider in Port Jefferson, NY (NPI 1104820018).
Provider details
- NPI number
- 1104820018
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 60-166236 (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
21 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
- 2005-06-08
- Last updated
- 2008-03-28
Frequently asked questions
- What is Mark Kropf's NPI number?
- Mark Kropf's National Provider Identifier (NPI) is 1104820018, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Kropf's specialty?
- Mark Kropf is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Kropf located?
- Mark Kropf's practice location on file with NPPES is 200 Belle Terre Road, Port Jefferson, NY 11777-1928.
- What is Mark Kropf's phone number?
- The practice phone number listed in the NPPES registry for Mark Kropf is (631) 331-6090.
- Is Mark Kropf's NPI active?
- Yes — Mark Kropf's NPI (1104820018) is active in the NPPES registry as of the last update on 2008-03-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.