John Kempen, MD
NPI 1679684385 · Ophthalmology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Kempen, MD is a Ophthalmology Physician provider in Boston, MA (NPI 1679684385).
Provider details
- NPI number
- 1679684385
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 270477 (MA)
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
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
- 2006-08-31
- Last updated
- 2022-07-21
Frequently asked questions
- What is John Kempen's NPI number?
- John Kempen's National Provider Identifier (NPI) is 1679684385, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Kempen's specialty?
- John Kempen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is John Kempen located?
- John Kempen's practice location on file with NPPES is 243 Charles St, Boston, MA 02114-3002.
- What is John Kempen's phone number?
- The practice phone number listed in the NPPES registry for John Kempen is (617) 573-3431.
- Does John Kempen accept Medicare?
- John Kempen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Kempen's NPI active?
- Yes — John Kempen's NPI (1679684385) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.