Michael Marcus, PHD

Michael Marcus is a Clinical Psychologist provider (Psychologist) practicing in Lawrence, NY, registered in the NPPES registry with NPI 1861035644 since 2019. The credential PHD stands for Doctor of Philosophy. Practices at Rachel Lowinger Psychology Pllc (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1861035644
Entity type	Individual (Type 1)
Name	Michael Marcus
Credential	PHD
Sex	Male
Practice address	Lawrence, NY, 11559
Phone	6467842022
Enumeration date	2019-10-23
Last updated in NPPES	2022-01-24

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

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
103TC0700X	Clinical Psychologist	Primary	024615	NY

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

Copy-ready billing details

Provider: Michael Marcus, PHD
NPI: 1861035644
Taxonomy: 103TC0700X (Clinical Psychologist)
Address: Lawrence, NY, 11559

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1053510347	Marlene Teichman	Individual	Clinical Social Worker	Lawrence, NY
1457028409	Rachel Lowinger Psychology Pllc	Organization	Psychologist	Lawrence, NY
1346172459	Sharon Levi	Individual	Clinical Psychologist	Lawrence, NY

Verify this record

Cross-check NPI 1861035644 against the authoritative CMS record: view Michael Marcus on the official NPPES registry .

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. Read the full guide or validate an NPI number.

Frequently asked questions

What specialty is Michael Marcus?

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

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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2022-01-24.