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Physician Assistant

John Grassi, PA

Sees patients in Huntington, NY · Jericho, NY · New York

Summary

John Grassi, PA (Physician Assistant) is enrolled with Medicare at 2 practice locations in Huntington, NY and Jericho, NY. NPI 1457471450. Source: CMS National Downloadable File, updated 2026-10-02.

Call(631) 470‑9000 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about John Grassi, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

2Practice locations
Physician AssistantPrimary specialty
May acceptAccepts Medicare assignment
28Years since medical school (graduated 1998)
MaleGender (as listed)
Optum Urgent Care PLLCGroup practice

Quick answers

Where does John Grassi see patients?
Medicare's clinician data lists 2 practice locations, including Huntington, NY and Jericho, NY. Call before your visit to confirm the address.
What is John Grassi's specialty?
Medicare lists Physician Assistant as the primary specialty.
Does John Grassi accept Medicare assignment?
Medicare's clinician data says John Grassi may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
What is the phone number for John Grassi?
(631) 470-9000, as listed in official Medicare / NPI Registry data.
What is John Grassi's NPI number?
1457471450. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where John Grassi is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists John Grassi as a member of this group (CMS data updated 2026-10-02).

  • Optum Urgent Care PLLC68 clinicians in the group

Specialties

Find other clinicians: Physician Assistant, New York →

Other physician assistants in Huntington

Clinicians with the same Medicare primary specialty in Huntington, NY — not a recommendation.

All physician assistants in Huntington →

Clinician information

CredentialPA
Graduation year1998
Gender (as listed)Male
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1457471450
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians