2026 NPPES data Emergency Medicine Physician NPI 1578852877 M.D.
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JASON ANTUNEZ, M.D.

Emergency Medicine Physician in MERCED, 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
35
Medicare Part D claims · 21 beneficiaries · Emergency Medicine Physician avg: 352
What the federal data reveals: JASON ANTUNEZ, M.D. is a Emergency Medicine Physician ([object Object]) practicing in MERCED, California with a Medicare Part D prescribing footprint of 35 claims across 21 beneficiaries .

What stands out: JASON ANTUNEZ, M.D. filed 35 Medicare Part D claims in 2023 across MERCED, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

JASON ANTUNEZ, M.D. 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).

JASON ANTUNEZ, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 04/07/2011

NPI 1578852877

Primary specialty

Emergency Medicine Physician

High-volume

64,398 US NPIs in this specialty

Medicare Part D claims

35 90% vs specialty avg

2023 prescription claims

Specialty avg: 352

Specialty distribution in California

How Emergency Medicine Physician compares to other specialties among California providers

California providers

Emergency Medicine Physician share within California

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

Specialty board-certification context

Estimated specialty board-certified rate — Emergency Medicine Physician (ABMS / AOA reference)

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

Est. board-certified rate (Emergency Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Emergency Medicine 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).

JASON ANTUNEZ, M.D. is a Emergency Medicine Physician provider practicing in MERCED, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1578852877. 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.

JASON ANTUNEZ, M.D. appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding M.D. credentials at 333 MERCY AVE, MERCED, CA, 95340, with a listed phone of (209) 564-5000. NPI 1578852877 was issued on 04/07/2011. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ANTUNEZ 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 35 prescription claims written by this provider, covering 21 Medicare beneficiaries and totaling roughly $386 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.

Emergency Medicine Physician is a high-volume specialty nationwide, with 64,398 enrolled providers across 56 states and an average of 352 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

333 MERCY AVE
MERCED, CA 95340

Provider Details

NPI 1578852877
Specialty Emergency Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 04/07/2011

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 JASON ANTUNEZ, M.D.. To verify JASON ANTUNEZ, M.D.'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.

35
Total Claims
$386
Total Drug Cost
21
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
35
Total Day Supply
329
Brand Drug Cost
$0
Generic Drug Cost
$386

Patient Demographics

Average Patient Age
64.4 years
Avg HCC Risk Score
1.10

Emergency Medicine Physician Overview

How JASON ANTUNEZ, M.D. fits within the Emergency Medicine Physician landscape nationally.

64,398
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider

JASON ANTUNEZ, M.D.'s 35 claims are below the specialty average of 352.

Nearby Emergency Medicine Physician Providers in California

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

Compare Emergency Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JASON ANTUNEZ, M.D.'s specialty?
JASON ANTUNEZ, M.D. specializes in Emergency Medicine Physician and practices in MERCED, California. Credentials: M.D..
How much does JASON ANTUNEZ, M.D. prescribe under Medicare Part D?
In 2023, JASON ANTUNEZ, M.D. wrote 35 Medicare Part D claims totaling $386 in drug costs for 21 beneficiaries.
Where is JASON ANTUNEZ, M.D. located?
JASON ANTUNEZ, M.D. is located at 333 MERCY AVE, MERCED, CA, 95340. Phone: (209) 564-5000.
What is JASON ANTUNEZ, M.D.'s NPI number?
JASON ANTUNEZ, M.D.'s National Provider Identifier (NPI) is 1578852877, issued on 04/07/2011.
How many Emergency Medicine Physician providers are there in the US?
There are 64,398 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
Does JASON ANTUNEZ, M.D. accept Medicare?
JASON ANTUNEZ, M.D. appears in CMS Medicare data with 35 Part D claims and 21 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JASON ANTUNEZ, M.D.'s credentials?
JASON ANTUNEZ, M.D.'s NPI is 1578852877 with credentials M.D.. 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