Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Michael Seth Grunes, PH.D.

Psychologist in Monroe, NY · enumerated 2006 · practices at Bonna Lynn Horovitz, Lcsw, Pllc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1538241641

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Seth Grunes

Credential PH.D.

Sex Male

Practice address Monroe, NY, 10950

Phone (845) 536-0816

Enumeration date Oct 19, 2006

Last updated in NPPES Jul 9, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 014146 (NY) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
02103693	Medicaid	NY	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Michael Grunes?

Michael Grunes is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Richard Brand Cognitive & Behavioral Psychologist · Monroe, NY NPI 1679563183 Stephanie Fersko Weiss Social Worker · Monroe, NY NPI 1154497394 Linda Lasalle Clinical Social Worker · Monroe, NY NPI 1992846034 Randi Barlow Clinical Social Worker · Monroe, NY NPI 1790807618 Henry Fersko-Weiss Clinical Social Worker · Monroe, NY NPI 1619162369 Bonna Horovitz Clinical Social Worker · Monroe, NY NPI 1447590393 Bonna Lynn Horovitz, Lcsw, Pllc Adolescent and Children Mental Health Clinic/Center · Monroe, NY NPI 1578009908

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.