Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Rebecca L Eisenberg, M.D.

Medical Oncology Physician in Sanford, ME · enumerated 2007.

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

National Provider Identifier

1518080639

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Rebecca L Eisenberg

Credential M.D.

Sex Female

Practice address 27 Industrial Ave Ste 101, Sanford, ME, 04073

Phone (207) 294-5800

Enumeration date Apr 6, 2007

Last updated in NPPES Apr 26, 2021

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 231351 (MA) Secondary

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 17501 (NH) Secondary

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License MD23794 (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
496421	Other	MA	TUFTS
8613966	Other	MA	CIGNA
7941952	Other	MA	AETNA
AA96705	Other	MA	HARVARD PILGRIM
J42096	Other	MA	BLUE CROSS LEGACY #

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 Rebecca Eisenberg practice?

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

What is the NPI number for Rebecca Eisenberg?

The National Provider Identifier (NPI) for Rebecca Eisenberg is 1518080639, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Amit Sanyal Hematology (Internal Medicine) Physician · Sanford, ME NPI 1831187707 Nicole Batty Hematology & Oncology Physician · Sanford, ME NPI 1003020413 Jenna Jaunich Physician Assistant · Sanford, ME NPI 1457944001

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-26.