2026 NPPES data Emergency Medical Services (Emergency Medicine) Physician NPI 1265745913 M.D.
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BERTRAM PROSSER, M.D.

Emergency Medical Services (Emergency Medicine) Physician in TUCSON, Arizona. 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
634
Medicare Part D claims · 436 beneficiaries · Emergency Medical Services (Emergency Medicine) Physician avg: 394
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$29.43
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

BERTRAM PROSSER, M.D. filed 634 Medicare Part D claims in 2023 as a Emergency Medical Services (Emergency Medicine) Physician in TUCSON, Arizona, prescribing 90% generic.

634
Part D claims, 2023
90%
generic prescribing
$29.43
industry payments (Sunshine Act)

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.

BERTRAM PROSSER, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

634 Top 31% higher than 69% 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%). Below this entry. 600–800: 56,224 prescribers (4%). This entry sits in this band. 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-eligible specialty (heuristic — not verified)

BERTRAM PROSSER, 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).

What does the federal data show about BERTRAM PROSSER, M.D.?

Quality data not reported

NPI registry status

Active

Issued 07/23/2010

NPI 1265745913

Primary specialty

Emergency Medical Services (Emergency Medicine) Physician

Niche

3,616 US NPIs in this specialty

Medicare Part D claims

634 61% vs specialty avg

2023 prescription claims

Specialty avg: 394

Specialty distribution in Arizona

How Emergency Medical Services (Emergency Medicine) Physician compares to other specialties among Arizona providers

Arizona providers

Emergency Medical Services (Emergency Medicine) Physician share within Arizona

1. Emergency Medical Services (Emergency Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Emergency Medical Services (Emergency Medicine) Physician share within Arizona

Specialty board-certification context

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

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

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

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

BERTRAM PROSSER, M.D. appears in the CMS NPPES registry as a Emergency Medical Services (Emergency Medicine) Physician provider holding M.D. credentials at 2800 E AJO WAY, TUCSON, AZ, 85713, with a listed phone of (520) 874-2000. NPI 1265745913 was issued on 07/23/2010. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what PROSSER 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 634 prescription claims written by this provider, covering 436 Medicare beneficiaries and totaling roughly $33K in drug spend, split 10% brand-name and 90% generic by claim count. 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 Medical Services (Emergency Medicine) Physician is a narrow specialty nationwide, with 3,616 enrolled providers across 55 states and an average of 394 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

2800 E AJO WAY
TUCSON, AZ 85713

Provider Details

NPI 1265745913
Specialty Emergency Medical Services (Emergency Medicine) Physician
Credentials M.D.
Gender Male
NPI Issued 07/23/2010

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for BERTRAM PROSSER, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$29

Largest payer

MERZ NORTH AMERICA, INC.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Typical

BERTRAM PROSSER, M.D. — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 634 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.

634
Total Claims
$33K
Total Drug Cost
436
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
771
Total Day Supply
12,374
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$26K
Generic Drug Cost
$6K
Antibiotic Claims
300

Patient Demographics

Average Patient Age
66.2 years
Avg HCC Risk Score
0.79
Gender Split
67% female / 33% male
Age Distribution
<65: 99, 65-74: 274, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What BERTRAM PROSSER, 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
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
68
Azithromycin
68
Prednisone
41
Amoxicillin
38
Nitrofurantoin Mono-Macro
Nitrofurantoin Monohyd/M-Cryst
30
Albuterol Sulfate Hfa
Albuterol Sulfate
21
Doxycycline Monohydrate
21
Paxlovid (Eua)
Nirmatrelvir/Ritonavir
21
Cephalexin
17
Sulfamethoxazole-Trimethoprim
Sulfamethoxazole/Trimethoprim
16

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

Emergency Medical Services (Emergency Medicine) Physician Overview

How BERTRAM PROSSER, M.D. fits within the Emergency Medical Services (Emergency Medicine) Physician landscape nationally.

3,616
Emergency Medical Services (Emergency Medicine) Physician Providers in US
55
States with Emergency Medical Services (Emergency Medicine) Physician
394
Avg Claims per Provider

BERTRAM PROSSER, M.D.'s 634 claims are above the specialty average of 394.

Nearby Emergency Medical Services (Emergency Medicine) Physician Providers in Arizona

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

Compare Emergency Medical Services (Emergency Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is BERTRAM PROSSER, M.D.'s specialty?
BERTRAM PROSSER, M.D. specializes in Emergency Medical Services (Emergency Medicine) Physician and practices in TUCSON, Arizona. Credentials: M.D..
How much does BERTRAM PROSSER, M.D. prescribe under Medicare Part D?
In 2023, BERTRAM PROSSER, M.D. wrote 634 Medicare Part D claims totaling $33K in drug costs for 436 beneficiaries.
Where is BERTRAM PROSSER, M.D. located?
BERTRAM PROSSER, M.D. is located at 2800 E AJO WAY, TUCSON, AZ, 85713. Phone: (520) 874-2000.
What is BERTRAM PROSSER, M.D.'s NPI number?
BERTRAM PROSSER, M.D.'s National Provider Identifier (NPI) is 1265745913, issued on 07/23/2010.
Does BERTRAM PROSSER, M.D. prescribe more brand-name or generic drugs?
BERTRAM PROSSER, M.D.'s prescribing is 10% brand-name and 90% generic drugs by claim count, with $26K in brand drug costs.
How many Emergency Medical Services (Emergency Medicine) Physician providers are there in the US?
There are 3,616 Emergency Medical Services (Emergency Medicine) Physician providers across 55 states in the US. The average Emergency Medical Services (Emergency Medicine) Physician provider writes 394 Medicare Part D claims per year.
What drugs does BERTRAM PROSSER, M.D. prescribe most often?
Based on 2023 Medicare Part D data, BERTRAM PROSSER, M.D.'s most frequently prescribed drugs include Amoxicillin-Clavulanate Potass, Azithromycin, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does BERTRAM PROSSER, M.D. accept Medicare?
BERTRAM PROSSER, M.D. appears in CMS Medicare data with 634 Part D claims and 436 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify BERTRAM PROSSER, M.D.'s credentials?
BERTRAM PROSSER, M.D.'s NPI is 1265745913 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