WILLIAM GREENHUT DO
NPI 1205098563
Emergency Medicine in Nyack, NY
About William Greenhut Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM GREENHUT DO (NPI 1205098563) is an individual emergency medicine provider in Nyack, New York, licensed in New York (271438-1) and active in the NPI registry since June 2008. He is enrolled in Medicare PECOS, is affiliated with Nyack Hospital, and maintains a secondary practice location in Bethlehem.
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 and accepts Medicare assignment
William Greenhut Do 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
4Medicare enrollment records show William Greenhut reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Nyack, NY 10960
- Reassigned Medicare billing, New York enrollment
- 119 clinicians in this Medicare group
Nyack, NY 10960
- Reassigned Medicare billing, New York enrollment
- 85 clinicians in this Medicare group
Nanuet, NY 10954
- Reassigned Medicare billing, New York enrollment
- 5 clinicians in this Medicare group
Mendham, NJ 07945
- Reassigned Medicare billing, New Jersey, New York, Pennsylvania and Texas enrollments
- 16 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.
Areas of Expertise CMS Part B claims 4
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Nyack Hospital
Acute Care Hospitals · Nyack, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10960 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.
NYACK, NY 10960
NYACK, NY 10960
NYACK, NY 10960
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 William Greenhut's NPI number?
The NPI number for William Greenhut is 1205098563. It was assigned to this individual provider in the NPPES registry on June 27, 2008.
Where is William Greenhut located?
William Greenhut practices at 160 N Midland Ave, Nyack, NY 10960. The listed phone number is (845) 348-2345.
What is William Greenhut's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is William Greenhut enrolled in Medicare?
Yes. William Greenhut 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 William Greenhut's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Greenhut reassigns Medicare benefits to 4 organizations: Montefiore Nyack Hospital (Nyack, NY), Nyack Emergency Medical Association PLLC (Nyack, NY), Hudson Valley Integrated Medicine PLLC. (Nanuet, NY) and Dimerhealth Medical Practice (Mendham, NJ). 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 William Greenhut's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is William Greenhut affiliated with any hospitals?
According to CMS data, William Greenhut is affiliated with Nyack Hospital.
When was this NPI record last updated?
The NPPES record for William Greenhut was last updated on June 3, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# William Greenhut, DO · NPI 1205098563
Emergency Medicine physician in Nyack, New York. Individual provider, active in the CMS NPPES registry since June 27, 2008.
## Identity
- **NPI:** 1205098563 (Entity type: Individual)
- **Enumerated:** June 27, 2008
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 271438-1 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 160 N MIDLAND AVE, Nyack, NY 10960
- **Phone:** (845) 348-2345 · **Fax:** (845) 348-2844
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Montefiore Nyack Hospital (NPI 1073881835, Nyack, NY); Nyack Emergency Medical Association PLLC (NPI 1174627293, Nyack, NY); Hudson Valley Integrated Medicine PLLC. (NPI 1073933313, Nanuet, NY); Dimerhealth Medical Practice (NPI 1285338483, Mendham, NJ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2008
## Record status
- **NPPES last updated:** June 3, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1205098563) · Data from the CMS NPPES public registry.