Robert Butler, MD
NPI 1528127123 · Family Medicine Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Butler, MD is a Family Medicine Physician provider in San Diego, CA (NPI 1528127123).
Provider details
- NPI number
- 1528127123
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G78182 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 51 | 29 |
| Atorvastatin Calcium | 26 | 17 |
| Metformin Hcl | 22 | — |
| Amlodipine Besylate | 19 | — |
| Levothyroxine Sodium | 19 | — |
| Omeprazole | 16 | — |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-08
- Last updated
- 2021-11-22
Frequently asked questions
- What is Robert Butler's NPI number?
- Robert Butler's National Provider Identifier (NPI) is 1528127123, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Butler's specialty?
- Robert Butler is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Butler located?
- Robert Butler's practice location on file with NPPES is 4647 Zion Ave, San Diego, CA 92120-2507.
- What is Robert Butler's phone number?
- The practice phone number listed in the NPPES registry for Robert Butler is (619) 528-5000.
- Does Robert Butler accept Medicare?
- Robert Butler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Butler's NPI active?
- Yes — Robert Butler's NPI (1528127123) is active in the NPPES registry as of the last update on 2021-11-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.