NPI Portal NPI Lookup & Verification

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

Dr. John Mcgowan Shimer, D.MIN.

Psychologist in Newburyport, MA · enumerated 2007 · practices at Patricia Dell-Ross, Inc..

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

National Provider Identifier

1356499024

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Registry record

Entity type Individual (Type 1)
Name Dr. John Mcgowan Shimer
Credential D.MIN.
Sex Male
Practice address Newburyport, MA, 01950
Phone (978) 465-3226
Fax (978) 465-3226
Enumeration date Jan 8, 2007
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 3804 (MA) Primary

Other identifiers

Identifier Type State Issuer
1890930 Other MA MBHP
6969-01 Other MA HPHC PACIFICARE
0516716 Medicaid MA -
W04090 Other MA BCBS OF MA
539827000 Other MA MAGELLAN

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

What is the NPI number for John Shimer?
The National Provider Identifier (NPI) for John Shimer is 1356499024, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Shimer practice?
The practice location on file with NPPES is in Newburyport, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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