DR. SHARON KARP M.D.
NPI 1265507768
Internal Medicine - Rheumatology in Stamford, CT
About Dr. Sharon Karp M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SHARON KARP M.D. (NPI 1265507768) is an individual rheumatology provider in Stamford, Connecticut, licensed in Connecticut (27019) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Sharon Karp M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Sharon Karp reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Katonah, NY 10536
- Reassigned Medicare billing, Connecticut and New York enrollments
- Medicare enrollment name: Westchester Health Medical PC
- 13 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.
Areas of Expertise CMS Part B claims 4
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 06902 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
STAMFORD, CT 06902
STAMFORD, CT 06902
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 Sharon Karp's NPI number?
The NPI number for Sharon Karp is 1265507768. It was assigned to this individual provider in the NPPES registry on November 21, 2006.
Where is Sharon Karp located?
Sharon Karp practices at 1450 Washington Blvd, Stamford, CT 06902. The listed phone number is (203) 327-9321.
What is Sharon Karp's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Sharon Karp enrolled in Medicare?
Yes. Sharon Karp is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Sharon Karp's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sharon Karp reassigns Medicare benefits to Westchester Health Medical, P.C. (Katonah, NY). 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 Sharon Karp'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 Sharon Karp was last updated on January 7, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Dr. Sharon Karp, M.D. · NPI 1265507768
Rheumatology physician in Stamford, Connecticut. Individual provider, active in the CMS NPPES registry since November 21, 2006.
## Identity
- **NPI:** 1265507768 (Entity type: Individual)
- **Enumerated:** November 21, 2006
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** 27019 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 1450 WASHINGTON BLVD, Stamford, CT 06902-2451
- **Phone:** (203) 327-9321 · **Fax:** (203) 406-1744
## 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:** Westchester Health Medical, P.C. (NPI 1386188647, Katonah, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 7, 2014
- **Other identifiers:** Medicare UPIN D85259 (CT); Medicare ID-Type Unspecified 110007645 (CT)
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Source: [NPI Profile](https://npiprofile.com/npi/1265507768) · Data from the CMS NPPES public registry.