John a Butler, MD
NPI 1902986094 · Surgical Oncology Physician · Orange, CA
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John a Butler, MD is a Surgical Oncology Physician provider in Orange, CA (NPI 1902986094).
Provider details
- NPI number
- 1902986094
- Entity type
- Individual
- Primary specialty
- Surgical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 000000G35047 (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
- 2006-10-16
- Last updated
- 2007-11-21
Frequently asked questions
- What is John a Butler's NPI number?
- John a Butler's National Provider Identifier (NPI) is 1902986094, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John a Butler's specialty?
- John a Butler is listed in the NPPES registry with a primary specialty of Surgical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John a Butler located?
- John a Butler's practice location on file with NPPES is Uci Medical Center, Orange, CA 92868.
- What is John a Butler's phone number?
- The practice phone number listed in the NPPES registry for John a Butler is (714) 456-8978.
- Does John a Butler accept Medicare?
- John a Butler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John a Butler's NPI active?
- Yes — John a Butler's NPI (1902986094) is active in the NPPES registry as of the last update on 2007-11-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.