Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert C Quackenbush, M.D.

Medical Oncology Physician in Walla Walla, WA · enumerated 2006.

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

National Provider Identifier

1962458877

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Registry record

Entity type Individual (Type 1)

Name Robert C Quackenbush

Credential M.D.

Sex Male

Practice address 401 W Poplar St, Walla Walla, WA, 99362

Phone (509) 522-5700

Fax (509) 522-5705

Enumeration date May 25, 2006

Last updated in NPPES Jun 26, 2013

Taxonomy & licenses

174400000X Specialist Other Service Providers · License MD00039975 (WA) Secondary

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License MD00039975 (WA) 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
P00057996	Other	WA	RRMC
227516	Medicaid	OR	-
8060599	Medicaid	ID	-
1118421	Medicaid	WA	-

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

Is NPI 1962458877 active?

Yes, as of the latest NPPES snapshot, NPI 1962458877 is active (record last updated 2013-06-26).

How do I verify Robert Quackenbush's NPI record?

Cross-check NPI 1962458877 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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Timothy Caudill Anesthesiology Physician · Walla Walla, WA NPI 1720083686 Kurt Schlicker Anesthesiology Physician · Walla Walla, WA NPI 1619972577 Robert Parks Emergency Medicine Physician · Walla Walla, WA NPI 1770581332 James Buratto Diagnostic Radiology Physician · Walla Walla, WA NPI 1467438044 Ronald Stiller Pulmonary Disease Physician · Walla Walla, WA NPI 1154396109 Rachelle Hartman Physical Therapist · Walla Walla, WA NPI 1245280494 Sara Hellberg Nurse Practitioner · Walla Walla, WA NPI 1174576094 Suwong Wongsuwan Cardiovascular Disease Physician · Walla Walla, WA NPI 1497700975

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-06-26.