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

Dr. Roger Scott Rittmaster, M.D.

Endocrinology, Diabetes & Metabolism Physician in Camden, ME · enumerated 2011.

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

National Provider Identifier

1518254903

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Registry record

Entity type Individual (Type 1)

Name Dr. Roger Scott Rittmaster

Credential M.D.

Sex Male

Practice address Camden, ME, 04843

Phone (207) 470-0445

Enumeration date Jul 6, 2011

Last updated in NPPES Jul 6, 2011

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License 011784 (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 Roger Rittmaster practice?

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

What is the NPI number for Roger Rittmaster?

The National Provider Identifier (NPI) for Roger Rittmaster is 1518254903, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-07-06.