Robert Simenson, MD
NPI 1942283221 · Family Medicine Physician · Merced, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Simenson, MD is a Family Medicine Physician provider in Merced, CA (NPI 1942283221).
Provider details
- NPI number
- 1942283221
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- C41324 (CA)
Specialties & taxonomies
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
2 documented practice locations
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 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 73 | 15 |
| Aripiprazole | 71 | 15 |
| Lithium Carbonatebrand: Lithium Carbonate Er | 59 | — |
| Trazodone Hcl | 58 | 11 |
| Escitalopram Oxalate | 58 | 13 |
| Lithium Carbonate | 57 | — |
| Clonazepam | 56 |
Practice location
Mailing address
Additional practice locations (1)
- 3940 Sandpiper AveMerced, CA 95340-8372Phone: (866) 682-4842
Registry dates
- Enumerated
- 2005-11-21
- Last updated
- 2023-03-07
- Certified
- 2020-03-17
Frequently asked questions
- What is Robert Simenson's NPI number?
- Robert Simenson's National Provider Identifier (NPI) is 1942283221, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Simenson's specialty?
- Robert Simenson is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Simenson located?
- Robert Simenson's practice location on file with NPPES is 847 W Childs Ave, Merced, CA 95341-6862.
- What is Robert Simenson's phone number?
- The practice phone number listed in the NPPES registry for Robert Simenson is (866) 682-4842.
- Does Robert Simenson accept Medicare?
- Robert Simenson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Simenson's NPI active?
- Yes — Robert Simenson's NPI (1942283221) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.