2026 NPPES data General Practice Physician NPI 1902249162 MD
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WILLIAM BRONSTON, MD

General Practice Physician in CARMICHAEL, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
18
Medicare Part D claims · General Practice Physician avg: 3K
What the federal data reveals: WILLIAM BRONSTON, MD is a General Practice Physician ([object Object]) practicing in CARMICHAEL, California with a Medicare Part D prescribing footprint of 18 claims .

What stands out: WILLIAM BRONSTON, MD filed 18 Medicare Part D claims in 2023 across CARMICHAEL, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

WILLIAM BRONSTON, 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).

WILLIAM BRONSTON, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 04/08/2013

NPI 1902249162

Primary specialty

General Practice Physician

Mid-sized

16,677 US NPIs in this specialty

Medicare Part D claims

18 99% vs specialty avg

2023 prescription claims

Specialty avg: 2,872

Specialty distribution in California

How General Practice Physician compares to other specialties among California providers

California providers

General Practice Physician share within California

1. General Practice Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
General Practice Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — General Practice Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
General Practice Physician ABMS/AOA estimate

Est. board-certified rate (General Practice Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (General Practice Physician) — ABMS / AOA estimate

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).

WILLIAM BRONSTON, MD is a General Practice Physician provider practicing in CARMICHAEL, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1902249162. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

WILLIAM BRONSTON, MD appears in the CMS NPPES registry as a General Practice Physician provider holding MD credentials at 3711 DELL RD, CARMICHAEL, CA, 95608, with a listed phone of (916) 944-0100. NPI 1902249162 was issued on 04/08/2013. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BRONSTON most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 18 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $582 in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

General Practice Physician is a mid-sized specialty nationwide, with 16,677 enrolled providers across 56 states and an average of 2,872 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

3711 DELL RD
CARMICHAEL, CA 95608

Provider Details

NPI 1902249162
Specialty General Practice Physician
Credentials MD
Gender Male
NPI Issued 04/08/2013

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 WILLIAM BRONSTON, MD. To verify WILLIAM BRONSTON, 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.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

18
Total Claims
$582
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
51
Total Day Supply
1,517
Brand Drug Cost
$0
Generic Drug Cost
$582

Patient Demographics

Average Patient Age
80.0 years
Avg HCC Risk Score
1.26

General Practice Physician Overview

How WILLIAM BRONSTON, MD fits within the General Practice Physician landscape nationally.

16,677
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider

WILLIAM BRONSTON, MD's 18 claims are below the specialty average of 2,872.

Nearby General Practice Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as BRONSTON.

Compare General Practice Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is WILLIAM BRONSTON, MD's specialty?
WILLIAM BRONSTON, MD specializes in General Practice Physician and practices in CARMICHAEL, California. Credentials: MD.
How much does WILLIAM BRONSTON, MD prescribe under Medicare Part D?
In 2023, WILLIAM BRONSTON, MD wrote 18 Medicare Part D claims totaling $582 in drug costs for N/A beneficiaries.
Where is WILLIAM BRONSTON, MD located?
WILLIAM BRONSTON, MD is located at 3711 DELL RD, CARMICHAEL, CA, 95608. Phone: (916) 944-0100.
What is WILLIAM BRONSTON, MD's NPI number?
WILLIAM BRONSTON, MD's National Provider Identifier (NPI) is 1902249162, issued on 04/08/2013.
How many General Practice Physician providers are there in the US?
There are 16,677 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
Does WILLIAM BRONSTON, MD accept Medicare?
WILLIAM BRONSTON, MD appears in CMS Medicare data with 18 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM BRONSTON, MD's credentials?
WILLIAM BRONSTON, MD's NPI is 1902249162 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

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