Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

A.. Robert Masten, M.D.

Dermatology Physician in Milford, DE · enumerated 2006.

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

National Provider Identifier

1083704472

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Registry record

Entity type Individual (Type 1)

Name A.. Robert Masten

Credential M.D.

Sex Male

Practice address 509 Lakeview Ave, Milford, DE, 19963

Phone (302) 422-4581

Fax (302) 424-4511

Enumeration date Oct 13, 2006

Last updated in NPPES Jul 3, 2008

Taxonomy & licenses

207NI0002X Clinical & Laboratory Dermatological Immunology Physician Allopathic & Osteopathic Physicians · License C1-0001516 (DE) Secondary

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License C1-0001516 (DE) Primary

207NS0135X Procedural Dermatology Physician Allopathic & Osteopathic Physicians · License C1-0001516 (DE) 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.

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Frequently asked questions

How do I verify A.. Masten's NPI record?

Cross-check NPI 1083704472 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1083704472 active?

Yes, as of the latest NPPES snapshot, NPI 1083704472 is active (record last updated 2008-07-03).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-07-03.