JEFFREY LESSER DO
NPI 1023710522
Internal Medicine in Buffalo, NY
About Jeffrey Lesser Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JEFFREY LESSER DO (NPI 1023710522) is an individual internal medicine provider in Buffalo, New York, licensed in New York (340551) and active in the NPI registry since March 2023. He is enrolled in Medicare PECOS and maintains a secondary practice location in Williamsville.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Jeffrey Lesser Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Jeffrey Lesser reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Dunkirk, NY 14048
- Reassigned Medicare billing, New York enrollment
- 572 clinicians in this Medicare group
Dallas, TX 75244
- Reassigned Medicare billing, Texas enrollment
- 1,246 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 14203 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
BUFFALO, NY 14203
BUFFALO, NY 14203
BUFFALO, NY 14203
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 Jeffrey Lesser's NPI number?
The NPI number for Jeffrey Lesser is 1023710522. It was assigned to this individual provider in the NPPES registry on March 20, 2023.
Where is Jeffrey Lesser located?
Jeffrey Lesser practices at 100 High St, Buffalo, NY 14203. The listed phone number is (716) 859-5600.
What is Jeffrey Lesser's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Jeffrey Lesser enrolled in Medicare?
Yes. Jeffrey Lesser is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Jeffrey Lesser's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jeffrey Lesser reassigns Medicare benefits to 2 organizations: General Physician, PC (Dunkirk, NY) and Signify Health Medical Associates, PLLC (Dallas, TX). Each 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 Jeffrey Lesser'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 Jeffrey Lesser was last updated on July 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Jeffrey Lesser, DO · NPI 1023710522
Internal Medicine physician in Buffalo, New York. Individual provider, active in the CMS NPPES registry since March 20, 2023.
## Identity
- **NPI:** 1023710522 (Entity type: Individual)
- **Enumerated:** March 20, 2023
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 340551 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 HIGH ST, Buffalo, NY 14203-1126
- **Phone:** (716) 859-5600
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): General Physician, PC (NPI 1093959322, Dunkirk, NY); Signify Health Medical Associates, PLLC (NPI 1750845863, Dallas, TX) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 28, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1023710522) · Data from the CMS NPPES public registry.