DR. JAN ZISLIS M.D.
NPI 1366492134
Emergency Medicine in Purchase, NY
About Dr. Jan Zislis M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JAN ZISLIS M.D. (NPI 1366492134) is an individual emergency medicine provider in Purchase, New York, licensed in Connecticut (039097) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through April 16, 2028, and is a graduate of Other (1998).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Jan Zislis M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Jan Zislis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Greenwich, CT 06830
- Reassigned Medicare billing, Connecticut enrollment
- 268 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 33D2182216
Jan Zislis MD PLLC Dba Modern Medical Concierge · Purchase, NYAreas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10577 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Zislis's NPI number?
The NPI number for Jan Zislis is 1366492134. It was assigned to this individual provider in the NPPES registry on May 11, 2006.
Where is Jan Zislis located?
Jan Zislis practices at 3010 Westchester Ave Ste 105, Purchase, NY 10577. The listed phone number is (914) 984-5052.
What is Jan Zislis's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Jan Zislis enrolled in Medicare?
Yes. Jan Zislis is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Jan Zislis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jan Zislis reassigns Medicare benefits to Greenwich Hospital (Greenwich, CT). 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 Zislis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Does Jan Zislis hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 33D2182216) is associated with this NPI, valid through April 16, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Jan Zislis was last updated on February 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 months 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.
# Dr. Jan Zislis, M.D. · NPI 1366492134
Emergency Medicine physician in Purchase, New York. Individual provider, active in the CMS NPPES registry since May 11, 2006.
## Identity
- **NPI:** 1366492134 (Entity type: Individual)
- **Enumerated:** May 11, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 039097 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 3010 WESTCHESTER AVE STE 105, Purchase, NY 10577-2524
- **Phone:** (914) 984-5052 · **Fax:** (914) 574-2348
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Greenwich Hospital (NPI 1609846088, Greenwich, CT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1998
## Record status
- **NPPES last updated:** February 11, 2025
- **CLIA laboratory certificates:** 1 on file
---
Source: [NPI Profile](https://npiprofile.com/npi/1366492134) · Data from the CMS NPPES public registry.