Robert Quackenbush, M.D.
NPI 1962458877 · Medical Oncology Physician · Walla Walla, WA
Enrolled with Medicare as Order and Referring Only - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Quackenbush, M.D. is a Medical Oncology Physician provider in Walla Walla, WA (NPI 1962458877).
Provider details
- NPI number
- 1962458877
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD00039975 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 203 | 38 |
| Exemestane | 86 | 16 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 75 | — |
| Lorazepam | 57 | 13 |
| Zanubrutinibbrand: Brukinsa | 32 | — |
| Acalabrutinib Maleatebrand: Calquence | 31 | — |
| Hydroxyurea | 31 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-25
- Last updated
- 2013-06-26
Frequently asked questions
- What is Robert Quackenbush's NPI number?
- Robert Quackenbush's National Provider Identifier (NPI) is 1962458877, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Quackenbush's specialty?
- Robert Quackenbush is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Quackenbush located?
- Robert Quackenbush's practice location on file with NPPES is 401 W Poplar St, Walla Walla, WA 99362-2846.
- What is Robert Quackenbush's phone number?
- The practice phone number listed in the NPPES registry for Robert Quackenbush is (509) 522-5700.
- Does Robert Quackenbush accept Medicare?
- Robert Quackenbush is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Quackenbush's NPI active?
- Yes — Robert Quackenbush's NPI (1962458877) is active in the NPPES registry as of the last update on 2013-06-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.