Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Warren Chance, M.D.

Radiation Oncology Physician in Salem, OR · enumerated 2012 · practices at Radiation Therapy Consultants, PC.

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

National Provider Identifier

1164788766

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name William Warren Chance

Credential M.D.

Sex Male

Practice address 875 Oak St Se Ste 1080, Salem, OR, 97301

Phone (503) 561-5294

Fax (503) 814-0457

Enumeration date Apr 9, 2012

Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License MD 181142 (OR) 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
500722681	Medicaid	OR	-
MD181142	Other	OR	OR MEDICAL LICENSE
R194126	Other	OR	MEDICARE PTAN OREGON

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

How do I verify William Chance's NPI record?

Cross-check NPI 1164788766 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1164788766 active?

Yes, as of the latest NPPES snapshot, NPI 1164788766 is active (record last updated 2023-03-07).

Other providers at this practice address

Browse all →

Radiation Therapy Consultants, PC Radiation Oncology Physician · Salem, OR NPI 1427139120 Samuel Wang Radiation Oncology Physician · Salem, OR NPI 1851512941 Shannon Lemay Physician Assistant · Salem, OR NPI 1255804233

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.