Marc Kenneth Klementowski, M.D.
Emergency Medicine Physician · Williamsville, NY
Marc Kenneth Klementowski, M.D. is an emergency medicine physician with a practice address in Williamsville, New York, and NPI 1134196728, issued on Mar 2, 2006. Check the license (New York 188748, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Marc Kenneth Klementowski
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 188748 NY
Self-reported in NPPES; status is on the state search - Practice location
- 6653 Main St, Williamsville, NY 14221
- Phone
- (716) 204-4500
- Enumerated
- Mar 2, 2006
- Record last updated
- Nov 20, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (716) 204-4501
- Medicaid ID
- 01795308 NY
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 5,025 in New York → Look up another NPI →
Also registered at 6653 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lloyd Brown, MDEmergency Medical Services (Emergency Medicine) Physician1043261779
- Syed Bukhari, MDEmergency Medical Services (Emergency Medicine) Physician1447203633
- Richard Elman, MDEmergency Medicine Physician1851345698
- Kathryn Gutillo, DOEmergency Medical Services (Emergency Medicine) Physician1184841306
- Douglas Hickox, MDEmergency Medicine Physician1396799698
- Steven Lakomy, MDEmergency Medical Services (Emergency Medicine) Physician1427002302
Verify Marc Kenneth Klementowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 188748Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% more Medicare Part D claims than the average emergency medicine physician in 2024
370 Medicare Part D claims for 226 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 38 claims were for opioids.
Most prescribed
- Prednisone59 claims
- Ondansetron Odt39 claims
- Hydrocodone-Acetaminophen33 claims
- Sulfamethoxazole-Trimethoprim29 claims
- Cefdinir28 claims
- Ibuprofen19 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.
Marc Kenneth Klementowski among 5,025 emergency medicine physician records in New York
Marc Kenneth Klementowski, M.D. is one of 5,025 emergency medicine physician records with a practice address in New York. 86% 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 3% of them.
- NPI issued2006 · 3% of these records are older, 72% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2007 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in New York
There are 5,025 emergency medicine physician records in New York.
All 5,025 in New York → Every provider in Williamsville → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Aaron Adams, MDWilliamsville, NY 142211962068080
- Anthony Buscaglia, D.O.Williamsville, NY 142211598828733
- Dana Collure, PAWilliamsville, NY 142211750433082
- Lee Cormier, M.D.Williamsville, NY 142211962533554
- Richard Elman, MDWilliamsville, NY 142211851345698
- Michael Ferguson, MDWilliamsville, NY 142211790728673
- Simranjit Gill, D.O.Williamsville, NY 142211033537584
- Douglas Hickox, MDWilliamsville, NY 142211396799698
Common questions
What is Marc Kenneth Klementowski, M.D.'s NPI number?
Marc Kenneth Klementowski, M.D.'s National Provider Identifier (NPI) is 1134196728, issued on Mar 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marc Kenneth Klementowski, M.D. located?
The NPPES record lists a practice address at 6653 Main St, Williamsville, NY, 14221. Phone: (716) 204-4500. Providers update this record themselves, so call before visiting.
How can I verify Marc Kenneth Klementowski, M.D.'s license?
NPPES lists New York license number 188748, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marc Kenneth Klementowski, M.D. prescribe under Medicare Part D?
In 2024, Marc Kenneth Klementowski, M.D. had 370 Medicare Part D claims for 226 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.
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.