Robert Witherspoon
NPI 1659456481 · Hematology & Oncology Physician · Seattle, WA
Robert Witherspoon is a Hematology & Oncology Physician provider in Seattle, WA (NPI 1659456481).
Provider details
- NPI number
- 1659456481
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- MD00012117 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-27
- Last updated
- 2012-12-28
Frequently asked questions
- What is Robert Witherspoon's NPI number?
- Robert Witherspoon's National Provider Identifier (NPI) is 1659456481, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Witherspoon's specialty?
- Robert Witherspoon is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Witherspoon located?
- Robert Witherspoon's practice location on file with NPPES is University of Washington Medical Ctr, Seattle, WA 98195-0001.
- What is Robert Witherspoon's phone number?
- The practice phone number listed in the NPPES registry for Robert Witherspoon is (206) 288-1000.
- Is Robert Witherspoon's NPI active?
- Yes — Robert Witherspoon's NPI (1659456481) is active in the NPPES registry as of the last update on 2012-12-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.