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DR. JAN STEPHEN CLOSE M.D.
NPI 1891867180
Internal Medicine in Potsdam, NY

Active since November 14, 2006PECOS Enrolled
50 LEROY ST, POTSDAM, NY 13676(315) 265-3300 Get Directions Write a Review

NPPES record last updated: July 10, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 10, 2024, Mar 31, 2021 (2 updates tracked since 2021).

About Dr. Jan Stephen Close M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JAN STEPHEN CLOSE M.D. (NPI 1891867180) is an individual internal medicine provider in Potsdam, New York, licensed in New York (151077) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Malone.

NPPES Registry Identity

NPI1891867180
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. JAN STEPHEN CLOSECredential: M.D.
Location Address50 LEROY STPotsdam, NY 13676-1786
Mailing Address50 Leroy StPotsdam, NY 13676-1786 · (315) 265-3300
Phone(315) 265-3300
Sole ProprietorNo
Enumeration DateNovember 14, 2006
Last NPPES UpdateJuly 10, 20242 updates tracked since enumeration
NPPES CertifiedJuly 10, 2024
✔ NPI 1891867180 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in NY · 151077
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
50 LEROY ST, Potsdam, NY 13676
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Secondary Practice Location 1

Location 1133 Park StMalone, NY 12953-1220 · Phone (518) 481-2543

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Jan Stephen Close M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Jan Close reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Canton-Potsdam Hospital
Same address
General Acute Care Hospital
50 LEROY STREET
Potsdam, NY 13676
  • Reassigned Medicare billing, New York enrollment
  • 414 clinicians in this Medicare group
NPI 1568548782 (315) 265-3300

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 13676 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.40 typical visit price
range $54.87 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$97.08 typical visit price
range $17.54 – $136.14
Typical copayment $24.27 (range $4.38 – $34.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JULIE LYNN LAWLESS LCSW
Social Worker (Clinical)
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 265-3300
DR. KYLE FLINT PHARMD, RPH
Pharmacist
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 265-3300
HEATHER MACKINNON
Physician Assistant
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 265-3300
KARYN SULLIVAN PA
Emergency Medicine
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 782-2620
COREEN BOHL MSW, LCSW, ACHP-SW
Social Worker (Clinical)
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 265-3300
KELSEY MILLER
Pharmacist
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 261-5511
CHRISTINA KASHMER PA
Physician Assistant
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 265-3300
YASMEEN ZAIDI MS
Counselor (Mental Health)
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 265-3300

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Jan Close's NPI number?

The NPI number for Jan Close is 1891867180. It was assigned to this individual provider in the NPPES registry on November 14, 2006.

Where is Jan Close located?

Jan Close practices at 50 Leroy St, Potsdam, NY 13676. The listed phone number is (315) 265-3300.

What is Jan Close's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Jan Close enrolled in Medicare?

Yes. Jan Close is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Jan Close's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jan Close reassigns Medicare benefits to Canton-Potsdam Hospital (Potsdam, NY). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Jan Close's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Jan Close was last updated on July 10, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.