Dr. Robert David Simenson, MD
- Medicare services, 2017
- 13
- Part D claims, 2024
- 1,276
- Hospital affiliations
- 1
- Industry payments
- $75
- Medical group
- 1
- Practice address
- 847 West Childs Ave, Merced, CA 95340
- Practice phone
- Call (209) 383-1848
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Merced Medical Suites
FQHC - Main Site · Merced, California
Find Dr. Simenson's professional email, personal email and mobile number
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Dr. Robert David Simenson is a family medicine physician in Merced, California
Dr. Simenson practices at Merced Medical Suites in Merced, California.
Dr. Simenson's NPI, 1942283221, was assigned on November 21, 2005. Dr. Simenson graduated from Tulane School of Medicine in 1981. Dr. Simenson's California license number on file is C41327.
- NPI
- 1942283221NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4880798180
- NPI enumeration date
- November 21, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (209) 383-1848
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert David Simenson practices at Merced Medical Suites in Merced, California
Dr. Simenson's primary practice is Merced Medical Suites, at 847 West Childs Ave, Merced, CA 95340 in Merced County. The practice phone is (209) 383-1848.
- Merced Medical Suites847 West Childs Ave, Merced, CA 95340 · Merced CountyPhone(209) 383-1848
Source: Dmand AI Affiliation Data
Dr. Robert David Simenson is affiliated with 2 sites of care and 1 medical group
Dr. Simenson's primary practice is Merced Medical Suites in Merced, California. Dr. Simenson is also affiliated with Dignity Health - Mercy Medical Center. The medical group on file is Golden Valley Health Centers.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Robert David Simenson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Simenson practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Merced Medical Suites | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert David Simenson is one of 15,680 family medicine physicians in California
Family medicine is Dr. Simenson's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Simenson is board certified in family medicine by the American Board of Family Medicine. Dr. Simenson has a license on file in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists adjustment disease, alzheimer's disease, anxiety, arthritis, asthma, atrial fibrillation and flutter, bipolar disorder and bursitis among the conditions Dr. Simenson treats.
Family medicine physicians near Dr. Simenson
Counts of family medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Robert David Simenson billed Medicare for 13 services in 2017
CMS data shows 13 Medicare services from Dr. Simenson across 1 procedure code in 2017. Medicare paid $41 for them. Every service was in an office.
Dr. Simenson's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Lab and pathology
- 2016: 772017: 1383%
- Tests and treatments
- 2016: 162017: 0100%
Dr. Simenson compared with the California median for family medicine physicians, 2017
- Dr. Simenson
- California median
- Medicare services
- 13vs 24695% below
- Part D claims
- 1,019vs 83322% above
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Simenson's most billed Medicare procedure codes, 2017
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Simenson and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert David Simenson's patients have a median age of 46
Across all payers, Dmand AI patient panel data puts Dr. Simenson's median patient age at 46, with 62% women.
Dr. Simenson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 46
Patient panel by sex, all payers
- Women62%
- Men38%
Source: Dmand AI Patient Panel Data
Dr. Robert David Simenson wrote 1,276 Medicare Part D claims in 2024
In 2024, Dr. Simenson wrote 1,276 Medicare Part D claims for 145 patients. 92% of them were for generic drugs. CMS names the drug for 1,019 of them, across 33 drugs with 11 or more claims each, at $42,466 in total drug cost. In 2023, CMS named 949 claims across 28 drugs.
Dr. Simenson's Part D claims by kind of drug, 2024
- Generic1,174 claims92%
- Brand-name and other102 claims8%
Dr. Simenson's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Simenson's Part D claims, 2024
- Opioids2%21 of 1,276 claims
- Antipsychotics, patients 65 and over10%129 of 1,276 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9492024: 1,0197%
Drugs named by CMS: 33 in 2024, 28 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Robert David Simenson takes part in Medicare
Dr. Simenson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Robert David Simenson received $75 in industry payments from 2019 to 2023
CMS Open Payments shows 2 general payments to Dr. Simenson from 2 drug and device companies from 2019 to 2023. Food and beverage make up the largest share, 100% of the total. Endogastric Solutions, Inc paid the most, $53.
General payments to Dr. Simenson by program year, 2019 to 2023
Companies that paid Dr. Simenson the most, 2019 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Robert David Simenson graduated from Tulane School of Medicine
Dr. Simenson graduated from Tulane School of Medicine in 1981.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Robert David Simenson accepts plans from 14 insurance carriers
Dr. Simenson is in network with 14 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. Simenson accepts, by number of carriers
- PPO9
- Medicare7
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Robert David Simenson's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Robert David Simenson
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Robert David Simenson's NPI number?
Dr. Robert David Simenson's NPI number is 1942283221. It was assigned on November 21, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert David Simenson?
Dr. Robert David Simenson is a family medicine physician in Merced, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Robert David Simenson practice?
Dr. Simenson practices at 847 West Childs Ave, Merced, CA 95340. Dr. Simenson's primary practice is Merced Medical Suites in Merced, California.
What is Dr. Robert David Simenson's office phone number?
The practice phone on file for Dr. Simenson is (209) 383-1848.
What is Dr. Robert David Simenson's medical license number?
Dr. Simenson's California license number on file is C41327.
Which hospitals is Dr. Robert David Simenson affiliated with?
Dr. Simenson is affiliated with Dignity Health - Mercy Medical Center.
What medical group is Dr. Robert David Simenson part of?
Dr. Simenson is linked to Golden Valley Health Centers.
Does Dr. Robert David Simenson accept Medicare?
Yes. CMS data shows Dr. Simenson billed Medicare for 13 services in 2017, and Dr. Simenson accepts Medicare assignment.
Is Dr. Robert David Simenson board certified?
Yes. Dr. Simenson is board certified in family medicine by the American Board of Family Medicine.
What services does Dr. Robert David Simenson bill to Medicare?
In 2017, Dr. Simenson's most billed Medicare services were lab and pathology test (82962).
Show 5 more questionsShow fewer questions
Where did Dr. Robert David Simenson go to medical school?
Dr. Simenson graduated from Tulane School of Medicine in 1981.
What drugs does Dr. Robert David Simenson prescribe most?
In 2024 Medicare Part D data, Dr. Simenson's most prescribed drugs by claims were Quetiapine Fumarate, Aripiprazole and Lithium Carbonate ER.
Has Dr. Robert David Simenson received payments from drug or device companies?
CMS Open Payments shows $75 in general payments to Dr. Simenson from 2 companies from 2019 to 2023. The largest total came from Endogastric Solutions, Inc.
How long has Dr. Robert David Simenson been practicing?
Dr. Simenson graduated from medical school in 1981, 45 years ago.
What insurance does Dr. Robert David Simenson accept?
Dr. Simenson is in network with 14 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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