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

Dr. Ronald D Siegel, PSY.D.

Clinical Psychologist in Lincoln, MA · enumerated 2006.

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

National Provider Identifier

1366401069

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Registry record

Entity type Individual (Type 1)

Name Dr. Ronald D Siegel

Credential PSY.D.

Sex Male

Practice address Lincoln, MA, 01773

Phone (781) 259-3434

Enumeration date Mar 21, 2006

Last updated in NPPES Dec 14, 2011

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

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 3585 (MA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
W03629	Other	MA	BLUE SHIELD OF MASS.
0514586	Medicaid	MA	-

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

Where does Ronald Siegel practice?

The practice location on file with NPPES is in Lincoln, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Ronald Siegel?

The National Provider Identifier (NPI) for Ronald Siegel is 1366401069, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Gina Arons Clinical Psychologist · Lincoln, MA NPI 1871635375

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-12-14.