Robert Horvat, MD, PHD
NPI 1841279668 · Endocrinology, Diabetes & Metabolism Physician · Mariposa, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Horvat, MD, PHD is a Endocrinology, Diabetes & Metabolism Physician provider in Mariposa, CA (NPI 1841279668).
Provider details
- NPI number
- 1841279668
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A062483 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 355 | 104 |
| Metformin Hcl | 235 | 75 |
| Alendronate Sodium | 205 | 65 |
| Rosuvastatin Calcium | 205 | 71 |
| Atorvastatin Calcium | 191 | 56 |
| Dulaglutidebrand: Trulicity | 174 | 35 |
| Semaglutide |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-10
- Last updated
- 2026-05-14
- Certified
- 2026-05-14
Frequently asked questions
- What is Robert Horvat's NPI number?
- Robert Horvat's National Provider Identifier (NPI) is 1841279668, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Horvat's specialty?
- Robert Horvat is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Horvat located?
- Robert Horvat's practice location on file with NPPES is 5189 Hospital Rd, Mariposa, CA 95338-9524.
- What is Robert Horvat's phone number?
- The practice phone number listed in the NPPES registry for Robert Horvat is (209) 966-2154.
- Does Robert Horvat accept Medicare?
- Robert Horvat is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Horvat's NPI active?
- Yes — Robert Horvat's NPI (1841279668) is active in the NPPES registry as of the last update on 2026-05-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.