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

Dr. Michelle Grennan, PHD

Individual provider Clinical Psychologist · NPI 1922544477

Dr. Michelle Grennan, PHD is a Clinical Psychologist in Mount Vernon, New York. Qualified in 2015, 11 years ago. Practices with Epic Long Island, a 43-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
11
Licensed in
NY
In the registry since
2017
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

765 Gramatan Ave
Mount Vernon, NY 10552-1043
Phone: (914) 310-7943
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 021973 (NY)

Record details

NPI number1922544477
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorYes
NPI enumeratedJanuary 9, 2017
Last updated in NPPESSeptember 17, 2019
Mailing address765 Gramatan Ave, Mount Vernon, NY 10552-1043

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Epic Long Island — 43 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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