Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Helen F. Ryan, MD

Hematology & Oncology Physician in Kennebunk, ME · enumerated 2006 · practices at Maine Center for Cancer Medicine & Blood Disorders, P.A..

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

National Provider Identifier

1477575793

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Registry record

Entity type Individual (Type 1)

Name Dr. Helen F. Ryan

Credential MD

Sex Female

Practice address 2 Independence Dr, Kennebunk, ME, 04043

Phone (207) 303-3300

Fax (207) 250-2144

Enumeration date Jul 24, 2006

Last updated in NPPES Apr 20, 2026

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 13302 (NH) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 017287 (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
P00458871	Other	ME	RAILROAD MEDICARE

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

Is NPI 1477575793 active?

Yes, as of the latest NPPES snapshot, NPI 1477575793 is active (record last updated 2026-04-20).

How do I verify Helen Ryan's NPI record?

Cross-check NPI 1477575793 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-20.