Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John J Gullo, MD

Q: What is the NPI number for John Gullo?

The National Provider Identifier (NPI) for John Gullo is 1700865243, a Type 1 (individual) record in the CMS NPPES registry.

Medical Oncology Physician in Brunswick, ME · enumerated 2006.

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

National Provider Identifier

1700865243

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name John J Gullo

Credential MD

Sex Male

Practice address 329 Maine St Ste E101, Brunswick, ME, 04011

Phone (207) 373-2266

Fax (207) 910-4413

Enumeration date Jan 12, 2006

Last updated in NPPES Apr 8, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD21675 (ME) Secondary

207RH0000X Hematology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License MD21675 (ME) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 137981-1 (NY) Secondary

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License MD21675 (ME) Primary

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

Other identifiers

Identifier	Type	State	Issuer
00602671	Medicaid	NY	-

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 John Gullo 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 John Gullo?

The National Provider Identifier (NPI) for John Gullo is 1700865243, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Renee Pinette Gynecologic Oncology Physician · Brunswick, ME NPI 1558788489 Allison Smith Hematology & Oncology Physician · Brunswick, ME NPI 1942695564 Hillary Glick Hematology & Oncology Physician · Brunswick, ME NPI 1801241989 Helen Yuan Hematology & Oncology Physician · Brunswick, ME NPI 1376034157

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-08.