Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William K Mueller, MD

Radiation Oncology Physician in Fall River, MA · enumerated 2005.

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

National Provider Identifier

1285639997

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Registry record

Entity type Individual (Type 1)

Name Dr. William K Mueller

Credential MD

Sex Male

Practice address 363 Highland Avenue, Southcoast Physician Services, Inc., Fall River, MA, 02720

Phone (508) 679-7814

Fax (508) 679-7881

Enumeration date Jun 17, 2005

Last updated in NPPES Mar 9, 2010

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 242436 (MA) Primary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 35-047483 (OH) Secondary

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
920005075	Other	OH	RR MEDICARE
0491794	Medicaid	OH	—

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 1285639997 active?

Yes — as of the latest NPPES snapshot, NPI 1285639997 is active (record last updated 2010-03-09).

How do I verify William Mueller's NPI record?

Cross-check NPI 1285639997 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Nancy Poblador Anesthesiology Physician · Fall River, MA NPI 1104823061 Onsi Rizk Anesthesiology Physician · Fall River, MA NPI 1124026729 Andrea Stewart Anesthesiology Physician · Fall River, MA NPI 1043277072 Grace Cook Nurse Practitioner · Fall River, MA NPI 1235370016 Monica Silva Nurse Practitioner · Fall River, MA NPI 1932434933

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-09.