NPPES file of Aug 9, 2026

Karen Kieliszek, NP

Obstetrics & Gynecology Nurse Practitioner · Buffalo, NY

Karen Kieliszek, NP is an obstetrics & gynecology nurse practitioner with a practice address in Buffalo, New York, and NPI 1811951031, issued on Apr 14, 2006. Check the license (New York 420400, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1811951031
Name
Karen Kieliszek
Credential
NP
Primary taxonomy
Obstetrics & Gynecology Nurse Practitioner 363LX0001X
License number
420400 NY
Self-reported in NPPES; status is on the state search
Practice location
155 Lawn Ave, Buffalo, NY 14207
Phone
(716) 875-2904
Enumerated
Apr 14, 2006
Record last updated
Sep 4, 2019 (not updated in 7 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20100913000000); accepts Medicare assignment
Medical or professional school
State University Of New York At Buffalo School Of Medicine, 1997
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest obstetrics & gynecology nurse practitioner records → All 178 in New York → Look up another NPI →

Also registered at 155 Lawn Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Seema Abdullah, DDSDentist1427258565
  2. Fikirte Adella, PAPhysician Assistant1023681137
  3. Elizabeth Agnello, LMSWSocial Worker1306213731
  4. Tariq Ahmed, MDAdult Medicine Physician1235627472
  5. Valerie Alexin, RNRegistered Nurse1578871984
  6. Grace Bachner, FNPFamily Nurse Practitioner1598646176

Verify Karen Kieliszek in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich New York board licenses this profession
    Search for license 420400    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the New York license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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3.6 times the Medicare Part D claims of the average obstetrics & gynecology nurse practitioner in 2024

719 Medicare Part D claims for 276 beneficiaries, against an average of 198 among the 1,094 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.

  1. Karen Kieliszek719
  2. Specialty average198

Most prescribed

  1. Estradiol163 claims
  2. Valacyclovir51 claims
  3. Fluconazole48 claims
  4. Nystatin31 claims
  5. Alendronate Sodium26 claims
  6. Nitrofurantoin Mono-Macro26 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $377.90

19 payments; by number, the most common kind was food and beverage; the largest payer was Mayne Pharma Commercial LLC. The 1,033 providers of this specialty with any payment received $439.39 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Karen Kieliszek$377.90
  2. Specialty average$439.39

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. General Physician PCDepew, NY

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Karen Kieliszek among 178 obstetrics & gynecology nurse practitioner records in New York

Karen Kieliszek, NP is one of 178 obstetrics & gynecology nurse practitioner records with a practice address in New York. 45% 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 9% of them.

  • NPI issued2006 · 9% of these records are older, 48% newer
  • In a Medicare fileYes · 45% of these records are
  • In the CMS Doctors and Clinicians fileYes · 25% of these records are
  • Graduated1997 · median 2000 among the 44 with a school on file
  • Record last updated2019 · 71% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LX0001X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Obstetrics & Gynecology Nurse Practitioner providers in New York

There are 178 obstetrics & gynecology nurse practitioner records in New York.

All 178 in New York → Every provider in Buffalo → Obstetrics & Gynecology Nurse Practitioner nationwide →

The 8 obstetrics & gynecology nurse practitioner records with the nearest ZIP codes

  1. Melinda Loefke, WHNPBuffalo, NY 142071306899885
  2. Lucinda Harden, NPBuffalo, NY 142081851565667
  3. Jane O'Leary, N.P.Buffalo, NY 142061649577735
  4. Sheila Summers, NPBuffalo, NY 142081972546422
  5. Amanda Koslosky, N.P.Buffalo, NY 142031831310002
  6. Claudia Emerson, NPBuffalo, NY 142141487608709
  7. Mary Schumer, N.P.Buffalo, NY 142201821012683
  8. Cheryl Haslinger, NPWilliamsville, NY 142211609910868

Common questions

What is Karen Kieliszek, NP's NPI number?

Karen Kieliszek, NP's National Provider Identifier (NPI) is 1811951031, issued on Apr 14, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Karen Kieliszek, NP located?

The NPPES record lists a practice address at 155 Lawn Ave, Buffalo, NY, 14207. Phone: (716) 875-2904. Providers update this record themselves, so call before visiting.

How can I verify Karen Kieliszek, NP's license?

NPPES lists New York license number 420400, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.

How much does Karen Kieliszek, NP prescribe under Medicare Part D?

In 2024, Karen Kieliszek, NP had 719 Medicare Part D claims for 276 beneficiaries; the average among obstetrics & gynecology nurse practitioner prescribers was 198. Part D covers Medicare prescriptions only.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.