JOHN H KEMPEN MD
NPI 1679684385
Ophthalmology in Boston, MA
About John H Kempen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN H KEMPEN MD (NPI 1679684385) is an individual ophthalmology provider in Boston, Massachusetts, licensed in Massachusetts (270477) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
John H Kempen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show John Kempen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 478 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02114
BOSTON, MA 02114
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Kempen's NPI number?
The NPI number for John Kempen is 1679684385. It was assigned to this individual provider in the NPPES registry on August 31, 2006.
Where is John Kempen located?
John Kempen practices at 243 Charles St, Boston, MA 02114. The listed phone number is (617) 573-3431.
What is John Kempen's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is John Kempen enrolled in Medicare?
Yes. John Kempen is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for John Kempen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Kempen reassigns Medicare benefits to Massachusetts Eye And Ear Associates, Inc. (Boston, MA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Kempen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Kempen was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John H Kempen, MD · NPI 1679684385
Ophthalmology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since August 31, 2006.
## Identity
- **NPI:** 1679684385 (Entity type: Individual)
- **Enumerated:** August 31, 2006
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** 270477 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 243 CHARLES ST, Boston, MA 02114-3002
- **Phone:** (617) 573-3431
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Massachusetts Eye And Ear Associates, Inc. (NPI 1932574332, Boston, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 21, 2022
- **Other identifiers:** Medicaid 001712345 (PA)
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Source: [NPI Profile](https://npiprofile.com/npi/1679684385) · Data from the CMS NPPES public registry.