MRS. KAREN JANET TERWILLIGER MS, APRN, AGPCNP-BC
NPI 1245616705
Nurse Practitioner - Gerontology in Mystic, CT
About Mrs. Karen Janet Terwilliger Ms, Aprn, Agpcnp-bc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. KAREN JANET TERWILLIGER MS, APRN, AGPCNP-BC (NPI 1245616705) is an individual gerontology provider in Mystic, Connecticut, licensed in Connecticut (6220) and active in the NPI registry since August 2015. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mrs. Karen Janet Terwilliger Ms, Aprn, Agpcnp-bc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Areas of Expertise CMS Part B claims 9
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06355 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 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MYSTIC, CT 06355
MYSTIC, CT 06355
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 Karen Terwilliger's NPI number?
The NPI number for Karen Terwilliger is 1245616705. It was assigned to this individual provider in the NPPES registry on August 7, 2015.
Where is Karen Terwilliger located?
Karen Terwilliger practices at 3 Heron Rd, Mystic, CT 06355. The listed phone number is (401) 497-6799.
What is Karen Terwilliger's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Gerontology, with taxonomy code 363LG0600X.
Is Karen Terwilliger enrolled in Medicare?
Yes. Karen Terwilliger is registered in the Medicare PECOS enrollment system.
When was this NPI record last updated?
The NPPES record for Karen Terwilliger was last updated on June 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.