2026 NPPES data Emergency Medicine Physician NPI 1598936841 M.D.
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AMANDA BARRETT, M.D.

Emergency Medicine Physician in DOWNEY, 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
496
Medicare Part D claims · 302 beneficiaries · Emergency Medicine Physician avg: 352
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

AMANDA BARRETT, M.D. filed 496 Medicare Part D claims in 2023 as a Emergency Medicine Physician in DOWNEY, California, prescribing 90% generic.

496
Part D claims, 2023
90%
generic prescribing
Likely
board-certified (heuristic)

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.

AMANDA BARRETT, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

496 Top 38% higher than 62% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 certification likely (heuristic — not verified)

AMANDA BARRETT, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about AMANDA BARRETT, M.D.?

Quality data not reported

NPI registry status

Active

Issued 03/14/2008

NPI 1598936841

Primary specialty

Emergency Medicine Physician

High-volume

64,398 US NPIs in this specialty

Medicare Part D claims

496 41% 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).

AMANDA BARRETT, M.D. appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding M.D. credentials at 9333 E. IMPERIAL HWY, DOWNEY, CA, 90242, with a listed phone of (562) 657-9000. NPI 1598936841 was issued on 03/14/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BARRETT 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 496 prescription claims written by this provider, covering 302 Medicare beneficiaries and totaling roughly $13K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 4.2%. 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

9333 E. IMPERIAL HWY
DOWNEY, CA 90242

Provider Details

NPI 1598936841
Specialty Emergency Medicine Physician
Credentials M.D.
Gender Female
NPI Issued 03/14/2008

Hospital and facility affiliations

Facilities where AMANDA BARRETT, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP
LOS ANGELES, CA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

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 AMANDA BARRETT, M.D.. To verify AMANDA BARRETT, 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.

Brand vs generic prescribing mix · Typical

AMANDA BARRETT, M.D. — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 496 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.

496
Total Claims
$13K
Total Drug Cost
302
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
600
Total Day Supply
9,373
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$6K
Generic Drug Cost
$5K
Opioid Claims
21 (4.2% rate)
Antibiotic Claims
132

Patient Demographics

Average Patient Age
73.0 years
Avg HCC Risk Score
1.50
Gender Split
62% female / 38% male
Age Distribution
<65: 26, 65-74: 152, 75-84: 96, 85+: 28

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What AMANDA BARRETT, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Paxlovid (Eua)
Nirmatrelvir/Ritonavir
54
Ondansetron Odt
Ondansetron
33
Prednisone
31
Azithromycin
29
Cefpodoxime Proxetil
29
Cephalexin
28
Albuterol Sulfate Hfa
Albuterol Sulfate
24
Ibuprofen
14
Valacyclovir
Valacyclovir Hcl
13

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Emergency Medicine Physician Overview

How AMANDA BARRETT, 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

AMANDA BARRETT, M.D.'s 496 claims are above 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 BARRETT.

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

Frequently Asked Questions

What is AMANDA BARRETT, M.D.'s specialty?
AMANDA BARRETT, M.D. specializes in Emergency Medicine Physician and practices in DOWNEY, California. Credentials: M.D..
How much does AMANDA BARRETT, M.D. prescribe under Medicare Part D?
In 2023, AMANDA BARRETT, M.D. wrote 496 Medicare Part D claims totaling $13K in drug costs for 302 beneficiaries.
Where is AMANDA BARRETT, M.D. located?
AMANDA BARRETT, M.D. is located at 9333 E. IMPERIAL HWY, DOWNEY, CA, 90242. Phone: (562) 657-9000.
What is AMANDA BARRETT, M.D.'s NPI number?
AMANDA BARRETT, M.D.'s National Provider Identifier (NPI) is 1598936841, issued on 03/14/2008.
Does AMANDA BARRETT, M.D. prescribe more brand-name or generic drugs?
AMANDA BARRETT, M.D.'s prescribing is 10% brand-name and 90% generic drugs by claim count, with $6K in brand drug costs.
Does AMANDA BARRETT, M.D. prescribe opioids?
Yes, AMANDA BARRETT, M.D. had 21 opioid claims in 2023 with an opioid prescribing rate of 4.2%.
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.
What drugs does AMANDA BARRETT, M.D. prescribe most often?
Based on 2023 Medicare Part D data, AMANDA BARRETT, M.D.'s most frequently prescribed drugs include Paxlovid (Eua), Ondansetron Odt, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does AMANDA BARRETT, M.D. accept Medicare?
AMANDA BARRETT, M.D. appears in CMS Medicare data with 496 Part D claims and 302 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify AMANDA BARRETT, M.D.'s credentials?
AMANDA BARRETT, M.D.'s NPI is 1598936841 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