Jan Slupski, MD
Internal Medicine Physician · Norwalk, CT
Jan Slupski, MD is an internal medicine physician with a practice address in Norwalk, Connecticut, and NPI 1487396933, issued on Apr 13, 2022. Check the license (Connecticut 80315, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Jan Slupski
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 80315 CT
Self-reported in NPPES; status is on the state search - Practice location
- 497 Westport Ave, Norwalk, CT 06851
- Phone
- (203) 424-2830
- Enumerated
- Apr 13, 2022
- Record last updated
- Apr 1, 2025
- Medicare enrollment
- Enrolled (PECOS I20250829000983); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 497 Westport Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Katelyn ScottFamily Nurse Practitioner1619577574
Verify Jan Slupski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 80315Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
170 Medicare Part D claims for 57 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through 2 group practices
- Nuvance Health Medical Practice CT IncNorwalk, CT
- Rehabilitation Associates IncFairfield, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jan Slupski among 2,623 internal medicine physician records in Connecticut
Jan Slupski, MD is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 95% of them.
- NPI issued2022 · 95% of these records are older, 2% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2021 · median 2004 among the 1,646 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
79 internal medicine physician records list a practice address in Norwalk
They are 79 of the 1,993 NPPES records with a practice address in Norwalk, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Norwalk → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sharyu Bande, MDNorwalk, CT 068511619130705
- Tao-Nan Chi, M.D.Norwalk, CT 068511538279583
- Charles Cochran, M.D.Norwalk, CT 068511962509489
- Marvin Den, M.D.Norwalk, CT 068511659363356
- Howard Eison, MDNorwalk, CT 068511427197086
- Sowmya Gadey, DONorwalk, CT 068511255619011
- Steven Glazer, MDNorwalk, CT 068511912011578
- Richard Huntley, M.D.Norwalk, CT 068511215929955
Common questions
What is Jan Slupski, MD's NPI number?
Jan Slupski, MD's National Provider Identifier (NPI) is 1487396933, issued on Apr 13, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Jan Slupski, MD located?
The NPPES record lists a practice address at 497 Westport Ave, Norwalk, CT, 06851. Phone: (203) 424-2830. Providers update this record themselves, so call before visiting.
How can I verify Jan Slupski, MD's license?
NPPES lists Connecticut license number 80315, 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 Jan Slupski, MD prescribe under Medicare Part D?
In 2024, Jan Slupski, MD had 170 Medicare Part D claims for 57 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.