Robert David Simenson, MD
Family Medicine Physician · Merced, CA
Robert David Simenson, MD is a family medicine physician with a practice address in Merced, California, and NPI 1942283221, issued on Nov 21, 2005. Check the license (California C41327, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert David Simenson
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- C41327 CA
C41324 CA
Self-reported in NPPES; status is on the state search - Practice location
- 847 W Childs Ave, Merced, CA 95341
- Phone
- (866) 682-4842
- Enumerated
- Nov 21, 2005
- Record last updated
- Mar 7, 2023
- Medicare enrollment
- Enrolled (PECOS I20070326000573); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1981
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 847 W Childs Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Miriam Arana, PAMedical Physician Assistant1144460130
- Allison Arquero, M.D.Pediatrics Physician1528407582
- Jeannette Ayala, MDFamily Medicine Physician1477536373
- Nancy Ayala, RNRegistered Nurse1952742280
- Marcus Bernardi, DCChiropractor1679581656
- Stephanie CapellBehavior Technician1215439864
Verify Robert David Simenson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C41327Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average family medicine physician in 2024
1,276 Medicare Part D claims for 145 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 21 claims were for opioids.
Most prescribed
- Quetiapine Fumarate73 claims
- Aripiprazole71 claims
- Lithium Carbonate Er59 claims
- Escitalopram Oxalate58 claims
- Trazodone Hcl58 claims
- Lithium Carbonate57 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Golden Valley Health CentersMerced, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert David Simenson among 17,133 family medicine physician records in California
Robert David Simenson, MD is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1981 · median 2005 among the 10,652 with a school on file
- Record last updated2023 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
94 family medicine physician records list a practice address in Merced
They are 94 of the 2,836 NPPES records with a practice address in Merced, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Merced → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jeannette Ayala, MDMerced, CA 953411477536373
- Humberto Barragan, DOMerced, CA 953411033435300
- Simrit Dyal, MDMerced, CA 953411578192043
- Monique Godbold Sanchez, M.D.Merced, CA 953411528045317
- Richard Hsu, DOMerced, CA 953411306234232
- Felicia Jodhka, M.D.Merced, CA 953411215228820
- Karuna Kem, D.OMerced, CA 953411760699557
- Anupam Khandelwal, MDMerced, CA 953411932240710
Common questions
What is Robert David Simenson, MD's NPI number?
Robert David Simenson, MD's National Provider Identifier (NPI) is 1942283221, issued on Nov 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert David Simenson, MD located?
The NPPES record lists a practice address at 847 W Childs Ave, Merced, CA, 95341. Phone: (866) 682-4842. Providers update this record themselves, so call before visiting.
How can I verify Robert David Simenson, MD's license?
NPPES lists California license number C41327, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert David Simenson, MD prescribe under Medicare Part D?
In 2024, Robert David Simenson, MD had 1,276 Medicare Part D claims for 145 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.