Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jonathan Taylor Grammer, MD

Emergency Medicine Physician in Brunswick, ME · enumerated 2019.

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

National Provider Identifier

1003375189

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Registry record

Entity type Individual (Type 1)

Name Dr. Jonathan Taylor Grammer

Credential MD

Sex Male

Practice address 123 Medical Center Dr, Brunswick, ME, 04011

Phone (207) 373-6000

Fax (207) 373-6080

Enumeration date Mar 18, 2019

Last updated in NPPES Apr 6, 2026

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License MD25342 (ME) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Jonathan Grammer practice?

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

What is the NPI number for Jonathan Grammer?

The National Provider Identifier (NPI) for Jonathan Grammer is 1003375189, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-06.