NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1093916116 M.D.
Verify on CMS → Mary Zahn, M.D.
Emergency Medicine Physician in Jacksonville, Florida.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 64,463 in Emergency 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
251
Medicare Part D claims · 145 beneficiaries · Emergency Medicine Physician avg: 352
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$20.4
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Mary Zahn, M.D. filed 251 Medicare Part D claims in 2023 as an Emergency Medicine Physician in Jacksonville, Florida, prescribing 95% generic.
- 251
- Part D claims, 2023
- 95%
- generic prescribing
- $20.4
- industry payments (Sunshine Act)
- ≥49th
- pct by Part D claim volume (lower-bound band)
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.
Mary Zahn, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
251 ≥ 49th percentile 49% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Mary Zahn, 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 Mary Zahn, M.D.?
Quality data not reportedPrimary specialty
Emergency Medicine Physician
Medicare Part D claims
251 29% vs specialty avg
Specialty distribution in Florida
How Emergency Medicine Physician compares to other specialties among Florida 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 Emergency 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).
Mary Zahn, M.D. appears in the CMS NPPES registry as an Emergency Medicine Physician provider holding M.D. credentials at 820 PRUDENTIAL DR, Jacksonville, FL, 32207, with a listed phone of (904) 396-5682. NPI 1093916116 was issued on 05/29/2007.
Medicare Part D records for calendar year 2023 show 251 prescription claims written by this provider, covering 145 Medicare beneficiaries and totaling roughly $4K in drug spend, split 5% brand-name and 95% generic by claim count, with an opioid prescribing rate of 20.3%.
Emergency Medicine Physician is a high-volume specialty nationwide, with 64,463 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
Provider Details
| NPI | 1093916116 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 05/29/2007 |
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 Mary Zahn, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$20
Largest payer
Organogenesis 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.
License & disciplinary context - Florida FLDOH 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 ~75K Florida medical licensees in 2023 - they are NOT specific to Mary Zahn, M.D.. To verify Mary Zahn, M.D.'s current license status, search the FLDOH public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
480
Total board actions, Florida 2023
Across 467 cases
6.40
Actions per 1,000 licensees
Florida statewide rate
monetary fine
Most common action type
138 cases
FLDOH 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 Florida disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Mary Zahn, M.D. - brand share 5.0%
Emergency Medicine Physician average
5% brand-name claims vs 95% generic, on 251 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.
251
Total Claims
$4K
Total Drug Cost
145
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 253
- Total Day Supply
- 2,264
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $2K
- Generic Drug Cost
- $2K
- Opioid Claims
- 51 (20.3% rate)
- Antibiotic Claims
- 74
Patient Demographics
- Average Patient Age
- 68.3 years
- Avg HCC Risk Score
- 2.10
- Gender Split
- 64% female / 36% male
- Age Distribution
- <65: 44, 65-74: 59, 75-84: 30, 85+: 12
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mary Zahn, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ondansetron Odt
Ondansetron Odt
37 claims
- Cephalexin
Cephalexin
32 claims
- Oxycodone-Acetamin…
Oxycodone-Acetaminophen
21 claims
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
19 claims
- Tramadol Hcl
Tramadol Hcl
17 claims
- Hydrocodone-Acetam… 11
Hydrocodone-Acetaminophen
11 claims
| Drug | Claims |
|---|---|
| Ondansetron Odt Ondansetron | 37 |
| Cephalexin | 32 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 21 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 19 |
| Tramadol Hcl | 17 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 11 |
* 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 Mary Zahn, M.D. fits within the Emergency Medicine Physician landscape nationally.
64,463
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider
Mary Zahn, M.D.'s 251 claims are below the specialty average of 352.
Nearby Emergency Medicine Physician Providers in Florida
Other clinicians with the same primary specialty enrolled in Florida, drawn from the same CMS NPPES roster as Zahn.
Dr. Rosemarie Abad
MD
Jacksonville, FL
Dr. Neal Abarbanell
MD
Miami, FL
Dr. Danny Abbruzzese
MD
Spring Hill, FL
Dr. Ahmed Abd El Aziz
MD
Fort Lauderdale, FL
Dr. Ahmed Abdelmagid
M.D.
Macclenny, FL
Compare Emergency 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 Florida medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Emergency 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 Mary Zahn, M.D.'s specialty? ▼
Mary Zahn, M.D. specializes in Emergency Medicine Physician and practices in Jacksonville, Florida. Credentials: M.D..
How much does Mary Zahn, M.D. prescribe under Medicare Part D? ▼
In 2023, Mary Zahn, M.D. wrote 251 Medicare Part D claims totaling $4K in drug costs for 145 beneficiaries.
Where is Mary Zahn, M.D. located? ▼
Mary Zahn, M.D. is located at 820 PRUDENTIAL DR, Jacksonville, FL, 32207. Phone: (904) 396-5682.
What is Mary Zahn, M.D.'s NPI number? ▼
Mary Zahn, M.D.'s National Provider Identifier (NPI) is 1093916116, issued on 05/29/2007.
Does Mary Zahn, M.D. prescribe more brand-name or generic drugs? ▼
Mary Zahn, M.D.'s prescribing is 5% brand-name and 95% generic drugs by claim count, with $2K in brand drug costs.
Does Mary Zahn, M.D. prescribe opioids? ▼
Yes, Mary Zahn, M.D. had 51 opioid claims in 2023 with an opioid prescribing rate of 20.3%.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 64,463 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 Mary Zahn, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Mary Zahn, M.D.'s most frequently prescribed drugs include Ondansetron Odt, Cephalexin, Oxycodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mary Zahn, M.D. accept Medicare? ▼
Mary Zahn, M.D. appears in CMS Medicare data with 251 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 Mary Zahn, M.D.'s credentials? ▼
Mary Zahn, M.D.'s NPI is 1093916116 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
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.