NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1134134091 MD
Verify on CMS → Benjamin Jewell, MD
Family Medicine Physician in Napa, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
2K
Medicare Part D claims · 145 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
82%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Benjamin Jewell, MD filed 1,666 Medicare Part D claims in 2023 as a Family Medicine Physician in Napa, California, prescribing 82% generic.
- 2K
- Part D claims, 2023
- 82%
- generic prescribing
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Benjamin Jewell, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,666 Top 18% higher than 82% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Benjamin Jewell, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Benjamin Jewell, MD?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
1,666 51% vs specialty avg
Specialty distribution in California
How Family Medicine Physician compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Family Medicine Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Benjamin Jewell, MD appears in the CMS NPPES registry as a Family Medicine Physician provider holding MD credentials at 1103 TRANCAS ST STE B, Napa, CA, 94558, with a listed phone of (707) 252-4872. NPI 1134134091 was issued on 07/29/2006.
Medicare Part D records for calendar year 2023 show 1,666 prescription claims written by this provider, covering 145 Medicare beneficiaries and totaling roughly $270K in drug spend, split 16% brand-name and 82% generic by claim count, with an opioid prescribing rate of 4.6%.
Family Medicine Physician is a high-volume specialty nationwide, with 147,760 enrolled providers across 56 states and an average of 3,418 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1134134091 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/29/2006 |
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Benjamin Jewell, MD. To verify Benjamin Jewell, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Benjamin Jewell, MD - brand share 16.0%
Family Medicine Physician average
16% brand-name claims vs 82% generic, on 1,666 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,666
Total Claims
$270K
Total Drug Cost
145
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,655
- Total Day Supply
- 105,110
- Brand vs Generic
- 16% brand / 82% generic
- Brand Drug Cost
- $235K
- Generic Drug Cost
- $35K
- Opioid Claims
- 77 (4.6% rate)
- Antibiotic Claims
- 77
Patient Demographics
- Average Patient Age
- 75.0 years
- Avg HCC Risk Score
- 0.72
- Gender Split
- 54% female / 46% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Benjamin Jewell, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
116 claims
- Atorvastatin Calcium
Atorvastatin Calcium
99 claims
- Mounjaro
Mounjaro
64 claims
- Lisinopril
Lisinopril
59 claims
- Celecoxib
Celecoxib
54 claims
- Losartan Potassium
Losartan Potassium
54 claims
- Pantoprazole Sodium
Pantoprazole Sodium
53 claims
- Metoprolol Succinate 40
Metoprolol Succinate
40 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 116 |
| Atorvastatin Calcium | 99 |
| Mounjaro Tirzepatide | 64 |
| Lisinopril | 59 |
| Celecoxib | 54 |
| Losartan Potassium | 54 |
| Pantoprazole Sodium | 53 |
| Metoprolol Succinate | 40 |
| Sertraline Hcl | 40 |
| Amlodipine Besylate | 35 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Benjamin Jewell, MD fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Benjamin Jewell, MD's 1,666 claims are below the specialty average of 3,418.
Nearby Family Medicine Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Jewell.
Dr. Omer Aba-Omer
MD
Santa Monica, CA
Dr. Michelle Ababa
MD
Wilmington, CA
Dr. Anna Tzeitel Abalos
MD
Roseville, CA
Dr. Adan Abarca
MD
Anaheim, CA
Dr. Lorraine Abate
M.D.
Sacramento, CA
Compare Family Medicine Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Benjamin Jewell, MD's specialty? ▼
Benjamin Jewell, MD specializes in Family Medicine Physician and practices in Napa, California. Credentials: MD.
How much does Benjamin Jewell, MD prescribe under Medicare Part D? ▼
In 2023, Benjamin Jewell, MD wrote 1,666 Medicare Part D claims totaling $270K in drug costs for 145 beneficiaries.
Where is Benjamin Jewell, MD located? ▼
Benjamin Jewell, MD is located at 1103 TRANCAS ST STE B, Napa, CA, 94558. Phone: (707) 252-4872.
What is Benjamin Jewell, MD's NPI number? ▼
Benjamin Jewell, MD's National Provider Identifier (NPI) is 1134134091, issued on 07/29/2006.
Does Benjamin Jewell, MD prescribe more brand-name or generic drugs? ▼
Benjamin Jewell, MD's prescribing is 16% brand-name and 82% generic drugs by claim count, with $235K in brand drug costs.
Does Benjamin Jewell, MD prescribe opioids? ▼
Yes, Benjamin Jewell, MD had 77 opioid claims in 2023 with an opioid prescribing rate of 4.6%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Benjamin Jewell, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Benjamin Jewell, MD's most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium, Mounjaro. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Benjamin Jewell, MD accept Medicare? ▼
Benjamin Jewell, MD appears in CMS Medicare data with 1,666 Part D claims and 145 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Benjamin Jewell, MD's credentials? ▼
Benjamin Jewell, MD's NPI is 1134134091 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.