Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mr. John Grassi, PA

Individual provider Emergency Medicine Physician · NPI 1457471450

Mr. John Grassi, PA is a Physician Assistant in Manhasset, New York. Qualified in 1998, 28 years ago. Practices with Optum Urgent Care PLLC, a 69-clinician group. Licensed in New York.

Years since qualifying
28
Licensed in
NY
In the registry since
2007
What do these letters mean?
PA — Physician Assistant
A licensed clinician who examines, diagnoses and treats under a physician's supervision.

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Practice location Address checks out

300 Community Dr
Manhasset, NY 11030-3816
Phone: (516) 562-3090
Fax: (516) 562-3680
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 006579 (NY)

Record details

NPI number1457471450
Entity typeIndividual (Type 1)
GenderMale
Credentials PA
Sole proprietorYes
NPI enumeratedMarch 31, 2007
Last updated in NPPESJuly 8, 2007
Mailing address972 Brush Hollow Rd, Westbury, NY 11590-1740

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 1998 (28 years in practice)
Group practice Optum Urgent Care Pllc — 69 clinicians
Accepts Medicare assignment Not indicated
Practice locations2 on file with Medicare

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