Michelle Grennan, PH.D.
Clinical Psychologist · Mount Vernon, NY
Michelle Grennan, PH.D. is a clinical psychologist with a practice address in Mount Vernon, New York, and NPI 1922544477, issued on Jan 9, 2017. Check the license (New York 021973, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Michelle Grennan
- Credential
- PH.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- 021973 NY
Self-reported in NPPES; status is on the state search - Practice location
- 765 Gramatan Ave, Mount Vernon, NY 10552
- Phone
- (914) 310-7943
- Enumerated
- Jan 9, 2017
- Record last updated
- Sep 17, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170220000086); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 6,558 in New York → Look up another NPI →
Verify Michelle Grennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license 021973Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Epic Long IslandEast Meadow, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michelle Grennan among 6,558 clinical psychologist records in New York
Michelle Grennan, PH.D. is one of 6,558 clinical psychologist records with a practice address in New York. 7% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 75% of them.
- NPI issued2017 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 7% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated2015 · median 1996 among the 1,251 with a school on file
- Record last updated2019 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Clinical Psychologist providers in New York
There are 6,558 clinical psychologist records in New York.
All 6,558 in New York → Every provider in Mount Vernon → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Michele RenchnerMount Vernon, NY 105521639239361
- Michael Stowe, PHDMount Vernon, NY 105521104832104
- Andrew Glover, PHDMount Vernon, NY 105501538129234
- Uriel Krakauer, PSYDMount Vernon, NY 105501508584996
- Alan McCollom, PHDMount Vernon, NY 105501699725531
- Rodrigo Munoz, PSYD.Mount Vernon, NY 105501720960073
- Emily FelberMount Kisco, NY 105491225686868
- Kathy Hirsch, PSY.DMount Kisco, NY 105491952746109
Common questions
What is Michelle Grennan, PH.D.'s NPI number?
Michelle Grennan, PH.D.'s National Provider Identifier (NPI) is 1922544477, issued on Jan 9, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Michelle Grennan, PH.D. located?
The NPPES record lists a practice address at 765 Gramatan Ave, Mount Vernon, NY, 10552. Phone: (914) 310-7943. Providers update this record themselves, so call before visiting.
How can I verify Michelle Grennan, PH.D.'s license?
NPPES lists New York license number 021973, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.