William Roberts, MD
NPI 1790873578 · Pediatric Hematology & Oncology Physician · Orange, CA
William Roberts, MD is a Pediatric Hematology & Oncology Physician provider in Orange, CA (NPI 1790873578).
Provider details
- NPI number
- 1790873578
- Entity type
- Individual
- Primary specialty
- Pediatric Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G85878 (CA)
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
- 2006-10-10
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Roberts's NPI number?
- William Roberts's National Provider Identifier (NPI) is 1790873578, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Roberts's specialty?
- William Roberts is listed in the NPPES registry with a primary specialty of Pediatric Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is William Roberts located?
- William Roberts's practice location on file with NPPES is 455 S Main St, Orange, CA 92868-3835.
- What is William Roberts's phone number?
- The practice phone number listed in the NPPES registry for William Roberts is (714) 532-8636.
- Is William Roberts's NPI active?
- Yes — William Roberts's NPI (1790873578) 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.