FREDERICK S KELSEY M.D.
NPI 1518908151
Internal Medicine in Plymouth, NH
About Frederick S Kelsey M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
FREDERICK S KELSEY M.D. (NPI 1518908151) is an individual internal medicine provider in Plymouth, New Hampshire, licensed in New Hampshire (6088) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Frederick S Kelsey M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Frederick Kelsey reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Plymouth, NH 03264
- Reassigned Medicare billing, New Hampshire enrollment
- 36 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 03264 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.
PLYMOUTH, NH 03264
PLYMOUTH, NH 03264
PLYMOUTH, NH 03264
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 Frederick Kelsey's NPI number?
The NPI number for Frederick Kelsey is 1518908151. It was assigned to this individual provider in the NPPES registry on June 8, 2006.
Where is Frederick Kelsey located?
Frederick Kelsey practices at 101 Boulder Point Dr Suite 1, Plymouth, NH 03264. The listed phone number is (603) 536-4000.
What is Frederick Kelsey's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Frederick Kelsey enrolled in Medicare?
Yes. Frederick Kelsey is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Frederick Kelsey's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Frederick Kelsey reassigns Medicare benefits to Mid-State Health Center (Plymouth, NH). 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 Frederick Kelsey'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 Frederick Kelsey was last updated on November 30, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.