Ernest Sliwinski
Emergency Medicine Physician · New Britain, CT
Ernest Sliwinski is an emergency medicine physician with a practice address in New Britain, Connecticut, and NPI 1770900789, issued on Mar 27, 2014. Check the license (Connecticut 59959, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Ernest Sliwinski
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 59959 CT
Self-reported in NPPES; status is on the state search - Practice location
- 100 Grand St, New Britain, CT 06052
- Phone
- (860) 224-5011
- Enumerated
- Mar 27, 2014
- Record last updated
- Mar 17, 2018 (not updated in 8 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 846 in Connecticut → Look up another NPI →
Also registered at 100 Grand St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Casey Aivano, APRNFamily Nurse Practitioner1366050411
- Kelly Alberdi, LCSWClinical Social Worker1750575452
- Farhana Alladin, M.DInternal Medicine Physician1891361101
- Maria Allen, PA-CSurgical Physician Assistant1093034431
Verify Ernest Sliwinski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 59959Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average emergency medicine physician in 2024
132 Medicare Part D claims for 102 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin22 claims
- Amoxicillin-Clavulanate Potass13 claims
- Prednisone11 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.
Ernest Sliwinski among 846 emergency medicine physician records in Connecticut
Ernest Sliwinski is one of 846 emergency medicine physician records with a practice address in Connecticut. 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 2014, is newer than 66% of them.
- NPI issued2014 · 66% of these records are older, 31% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileNo · 68% of these records are
- Record last updated2018 · 57% 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 Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
33 emergency medicine physician records list a practice address in New Britain
They are 33 of the 1,772 NPPES records with a practice address in New Britain, and 846 emergency medicine physician records in Connecticut.
All 846 in Connecticut → Every provider in New Britain → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- David Buono, M.D.New Britain, CT 060521659321305
- Ronald Clark, M.D.New Britain, CT 060521154369965
- Dennis Dolce, M.D.New Britain, CT 060521699701946
- Louis Graff, M.D.New Britain, CT 060521013968767
- Rene Hipona, M.D.New Britain, CT 060521801846670
- Eric Hobert, M.D.New Britain, CT 060521639148653
- William Karp, M.D.05New Britain, CT 060521174550297
- Edward Kim, M.D.New Britain, CT 060521598717159
Common questions
What is Ernest Sliwinski's NPI number?
Ernest Sliwinski's National Provider Identifier (NPI) is 1770900789, issued on Mar 27, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Ernest Sliwinski located?
The NPPES record lists a practice address at 100 Grand St, New Britain, CT, 06052. Phone: (860) 224-5011. Providers update this record themselves, so call before visiting.
How can I verify Ernest Sliwinski's license?
NPPES lists Connecticut license number 59959, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ernest Sliwinski prescribe under Medicare Part D?
In 2024, Ernest Sliwinski had 132 Medicare Part D claims for 102 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.