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Robert Ouwendijk, M.D.
NPI 1578627725 · Medical Oncology Physician · Ventura, CA
Robert Ouwendijk, M.D. is a Medical Oncology Physician provider in Ventura, CA (NPI 1578627725).
Provider details
- NPI number
- 1578627725
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G10155 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
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
3291 Loma Vista Rd
Ventura, CA 93003-3099
Phone: (805) 652-6556
Street-level locationGet directions
Mailing address
3291 Loma Vista Rd
Ventura, CA 93003-3099
Registry dates
- Enumerated
- 2006-12-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Robert Ouwendijk's NPI number?
- Robert Ouwendijk's National Provider Identifier (NPI) is 1578627725, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Ouwendijk's specialty?
- Robert Ouwendijk is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Ouwendijk located?
- Robert Ouwendijk's practice location on file with NPPES is 3291 Loma Vista Rd, Ventura, CA 93003-3099.
- What is Robert Ouwendijk's phone number?
- The practice phone number listed in the NPPES registry for Robert Ouwendijk is (805) 652-6556.
- Is Robert Ouwendijk's NPI active?
- Yes — Robert Ouwendijk's NPI (1578627725) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.