Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark William Simmons, PSY D

Clinical Psychologist in Norwood, MA · enumerated 2006.

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

National Provider Identifier

1730265125

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark William Simmons

Credential PSY D

Sex Male

Practice address 89 Access Rd, Suite 24, Norwood, MA, 02062

Phone (781) 551-0999

Fax (781) 551-3396

Enumeration date Oct 27, 2006

Last updated in NPPES Aug 2, 2010

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PY8278PR (MA) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

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 Mark Simmons?

Mark Simmons 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-08-02.