Jan Stephen Close, M.D.
Internal Medicine Physician · Potsdam, NY
Jan Stephen Close, M.D. is an internal medicine physician with a practice address in Potsdam, New York, and NPI 1891867180, issued on Nov 14, 2006. Check the license (New York 151077, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Jan Stephen Close
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 151077 NY
Self-reported in NPPES; status is on the state search - Practice location
- 50 Leroy St, Potsdam, NY 13676
- Phone
- (315) 265-3300
- Enumerated
- Nov 14, 2006
- Record last updated
- Jul 10, 2024
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 50 Leroy St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Caroline Arcand DusseaultOccupational Therapist1144015397
- Mariam Asar, MDChild & Adolescent Psychiatry Physician1649479239
- Timothy Atkinson, M.D.Family Medicine Physician1346239308
- Katherine Baker, RPA-CPhysician Assistant1316971831
- Cynthia Baltazar, M.D.Internal Medicine Physician1790782548
Verify Jan Stephen Close 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 151077Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average internal medicine physician in 2024
315 Medicare Part D claims for 51 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Atorvastatin Calcium21 claims
- Pantoprazole Sodium20 claims
- Losartan Potassium18 claims
- Metoprolol Succinate17 claims
- Lisinopril15 claims
- Rosuvastatin Calcium14 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.
Jan Stephen Close among 12,067 internal medicine physician records in New York
Jan Stephen Close, M.D. is one of 12,067 internal medicine physician records with a practice address in New York. 79% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2024 · 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 New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 internal medicine physician records list a practice address in Potsdam
They are 8 of the 445 NPPES records with a practice address in Potsdam, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Potsdam → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Cynthia Baltazar, M.D.Potsdam, NY 136761790782548
- William Detorres, MDPotsdam, NY 136761467453589
- Kaylan Mucci, MDPotsdam, NY 136761316477169
- Imre Rainey-Spence, M.D.Potsdam, NY 136761982862181
- Robert Rogers, M.D.Potsdam, NY 136761679596621
- Michael Tulloch, MDPotsdam, NY 136761780625715
- Eric Walter, MDPotsdam, NY 136761376106310
- Marta Anghel, MDOgdensburg, NY 136691891855730
Common questions
What is Jan Stephen Close, M.D.'s NPI number?
Jan Stephen Close, M.D.'s National Provider Identifier (NPI) is 1891867180, issued on Nov 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jan Stephen Close, M.D. located?
The NPPES record lists a practice address at 50 Leroy St, Potsdam, NY, 13676. Phone: (315) 265-3300. Providers update this record themselves, so call before visiting.
How can I verify Jan Stephen Close, M.D.'s license?
NPPES lists New York license number 151077, 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 Jan Stephen Close, M.D. prescribe under Medicare Part D?
In 2024, Jan Stephen Close, M.D. had 315 Medicare Part D claims for 51 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.