Karen L. Kosar, NURSE PRACTITIONER
Adult Health Nurse Practitioner · Williamsville, NY
Karen L. Kosar, NURSE PRACTITIONER is an adult health nurse practitioner with a practice address in Williamsville, New York, and NPI 1992712392, issued on Aug 1, 2006. Check the license (New York F302104-1, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karen L. Kosar
- Credential
- NURSE PRACTITIONER
- Primary taxonomy
- Adult Health Nurse Practitioner 363LA2200X
- License number
- F302104-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 295 Essjay RD, Williamsville, NY 14221
- Phone
- (716) 630-1000
- Enumerated
- Aug 1, 2006
- Record last updated
- Dec 20, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (716) 856-3002
- Medicaid ID
- 02258166 NY
- Entity
- Type 1 · individual
8 nearest adult health nurse practitioner records → All 6,028 in New York → Look up another NPI →
Also registered at 295 Essjay RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Renee Andreeff, PHYSICIAN ASSISTANTPhysician Assistant1063567444
- Melissa Apa, PHARMDPharmacist1922383447
- Bashir Attuwaybi, M.D.Colon & Rectal Surgery Physician1578791992
- Tracy Bauer, PAPhysician Assistant1629036207
- Nicole BlessPhysician Assistant1245707538
- Alicia Bommersbach, PHYSICIAN ASSISTANTMedical Physician Assistant1245244516
Verify Karen L. Kosar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license F302104-1Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 87.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Karen L. Kosar among 6,028 adult health nurse practitioner records in New York
Karen L. Kosar, NURSE PRACTITIONER is one of 6,028 adult health nurse practitioner records with a practice address in New York. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 87% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 44% of these records are
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2200X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
61 adult health nurse practitioner records list a practice address in Williamsville
They are 61 of the 3,530 NPPES records with a practice address in Williamsville, and 6,028 adult health nurse practitioner records in New York.
All 6,028 in New York → Every provider in Williamsville → Adult Health Nurse Practitioner nationwide →
The 8 adult health nurse practitioner records with the nearest ZIP codes
- Andrea Bauer, N.P.Williamsville, NY 142211821095878
- Rita Colicchia, NURSE PRACTITIONERWilliamsville, NY 142211942267885
- Bonnie Dugan, ANPCWilliamsville, NY 142211366481657
- Lisa Durandetto, NPWilliamsville, NY 142211366408775
- Debbra Hadden, ANPWilliamsville, NY 142211356388722
- Patrice Hart-Barber, ANP-CWilliamsville, NY 142211205807450
- Ann Lillis, ANPWilliamsville, NY 142211609852607
- Karmell Macoretta, NPWilliamsville, NY 142211154324028
Common questions
What is Karen L. Kosar, NURSE PRACTITIONER's NPI number?
Karen L. Kosar, NURSE PRACTITIONER's National Provider Identifier (NPI) is 1992712392, issued on Aug 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen L. Kosar, NURSE PRACTITIONER located?
The NPPES record lists a practice address at 295 Essjay RD, Williamsville, NY, 14221. Phone: (716) 630-1000. Providers update this record themselves, so call before visiting.
How can I verify Karen L. Kosar, NURSE PRACTITIONER's license?
NPPES lists New York license number F302104-1, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
What is Karen L. Kosar, NURSE PRACTITIONER's MIPS final score?
The 2023 MIPS final score is 87.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.