DR. MICHAEL STEVENSON MAY MD
NPI 1295222305
Internal Medicine - Medical Oncology in West Harrison, NY
About Dr. Michael Stevenson May Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL STEVENSON MAY MD (NPI 1295222305) is an individual medical oncology provider in West Harrison, New York, licensed in New York (311043) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS and is a graduate of Columbia University College Of Physicians And Surgeons (2018).
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. Michael Stevenson May Md 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 Reassignments
3Medicare enrollment records show Michael May reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
West Harrison, NY 10604
- Reassigned Medicare billing, New York enrollment
- 328 clinicians in this Medicare group
New York, NY 10021
- Reassigned Medicare billing, New York enrollment
- 259 clinicians in this Medicare group
New York, NY 10021
- Reassigned Medicare billing, New York enrollment
- 514 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 10604 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.
WEST HARRISON, NY 10604
WEST HARRISON, NY 10604
WEST HARRISON, NY 10604
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 Michael May's NPI number?
The NPI number for Michael May is 1295222305. It was assigned to this individual provider in the NPPES registry on April 16, 2018.
Where is Michael May located?
Michael May practices at 500 Westchester Ave, West Harrison, NY 10604. The listed phone number is (917) 608-3250.
What is Michael May's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Michael May enrolled in Medicare?
Yes. Michael May 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 organizations bill Medicare for Michael May's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael May reassigns Medicare benefits to 3 organizations: Msk Harrison (West Harrison, NY), Memorial Developmental Chemo Group (New York, NY) and Memorial Solid Tumor Group (New York, NY). 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 Michael May'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 Michael May was last updated on May 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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. Michael Stevenson May, MD · NPI 1295222305
Medical Oncology physician in West Harrison, New York. Individual provider, active in the CMS NPPES registry since April 16, 2018.
## Identity
- **NPI:** 1295222305 (Entity type: Individual)
- **Enumerated:** April 16, 2018
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** 311043 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 500 WESTCHESTER AVE, West Harrison, NY 10604-3200
- **Phone:** (917) 608-3250
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Msk Harrison (NPI 1174923593, West Harrison, NY); Memorial Developmental Chemo Group (NPI 1912978487, New York, NY); Memorial Solid Tumor Group (NPI 1699746172, New York, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Columbia University College Of Physicians And Surgeons, class of 2018
## Record status
- **NPPES last updated:** May 15, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1295222305) · Data from the CMS NPPES public registry.