Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jens Rueter, MD

Q: What is the NPI number for Jens Rueter?

The National Provider Identifier (NPI) for Jens Rueter is 1891995189, a Type 1 (individual) record in the CMS NPPES registry.

Hematology & Oncology Physician in Brewer, ME · enumerated 2007 · practices at Northeast Radiation Oncology PA.

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

National Provider Identifier

1891995189

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Registry record

Entity type Individual (Type 1)

Name Jens Rueter

Credential MD

Sex Male

Practice address 33 Whiting Hill Rd, Suite 21, Brewer, ME, 04412

Phone (207) 973-7478

Fax (207) 973-7807

Enumeration date Jul 24, 2007

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License R021397 (ME) Primary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MT191485 (PA) Secondary

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 Jens Rueter practice?

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

What is the NPI number for Jens Rueter?

The National Provider Identifier (NPI) for Jens Rueter is 1891995189, 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 2022-07-21.