NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1063494284 PAC
Verify on CMS → David Zimmerman, PAC
Emergency Medicine Physician in Gilbert, Arizona.
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
260
Medicare Part D claims · 157 beneficiaries · Emergency Medicine Physician avg: 352
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
David Zimmerman, PAC filed 260 Medicare Part D claims in 2023 as an Emergency Medicine Physician in Gilbert, Arizona, prescribing 87% generic.
- 260
- Part D claims, 2023
- 87%
- generic prescribing
- ≥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.
David Zimmerman, PAC's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
260 ≥ 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)
David Zimmerman, PAC 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 David Zimmerman, PAC?
Quality data not reportedPrimary specialty
Emergency Medicine Physician
Medicare Part D claims
260 26% vs specialty avg
Specialty distribution in Arizona
How Emergency Medicine Physician compares to other specialties among Arizona 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).
David Zimmerman, PAC appears in the CMS NPPES registry as an Emergency Medicine Physician provider holding PAC credentials at 1900 N HIGLEY RD, Gilbert, AZ, 85234, with a listed phone of (480) 543-2485. NPI 1063494284 was issued on 11/15/2005.
Medicare Part D records for calendar year 2023 show 260 prescription claims written by this provider, covering 157 Medicare beneficiaries and totaling roughly $3K in drug spend, split 13% brand-name and 87% generic by claim count.
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 | 1063494284 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | PAC |
| Gender | Male |
| NPI Issued | 11/15/2005 |
Brand vs generic prescribing mix · Typical
David Zimmerman, PAC - brand share 13.0%
Emergency Medicine Physician average
13% brand-name claims vs 87% generic, on 260 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.
260
Total Claims
$3K
Total Drug Cost
157
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 260
- Total Day Supply
- 1,916
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $1K
- Generic Drug Cost
- $2K
- Antibiotic Claims
- 62
Patient Demographics
- Average Patient Age
- 70.7 years
- Avg HCC Risk Score
- 1.52
- Gender Split
- 66% female / 34% male
- Age Distribution
- <65: 24, 65-74: 68, 75-84: 49, 85+: 16
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What David Zimmerman, PAC prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisone
Prednisone
50 claims
- Naproxen
Naproxen
26 claims
- Ondansetron Odt
Ondansetron Odt
20 claims
- Cyclobenzaprine Hcl 19
Cyclobenzaprine Hcl
19 claims
- Ec-Naproxen 16
Ec-Naproxen
16 claims
- Amoxicillin-Clavul… 14
Amoxicillin-Clavulanate Potass
14 claims
- Cephalexin 11
Cephalexin
11 claims
- Sucralfate 11
Sucralfate
11 claims
| Drug | Claims |
|---|---|
| Prednisone | 50 |
| Naproxen | 26 |
| Ondansetron Odt Ondansetron | 20 |
| Cyclobenzaprine Hcl | 19 |
| Ec-Naproxen Naproxen | 16 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 14 |
| Cephalexin | 11 |
| Sucralfate | 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 David Zimmerman, PAC 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
David Zimmerman, PAC's 260 claims are below the specialty average of 352.
Nearby Emergency Medicine Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Zimmerman.
Dr. Dimyana Abdelmalek
MD
Chinle, AZ
Dr. Linda Abernathy
MD
Tuba City, AZ
Dr. Sameer Aboufadel
DO, MPH
Tucson, AZ
Dr. Josephine Acuna
M.D
Tucson, AZ
Dr. Norberto Adame
MD
Phoenix, AZ
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 Arizona 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 David Zimmerman, PAC's specialty? ▼
David Zimmerman, PAC specializes in Emergency Medicine Physician and practices in Gilbert, Arizona. Credentials: PAC.
How much does David Zimmerman, PAC prescribe under Medicare Part D? ▼
In 2023, David Zimmerman, PAC wrote 260 Medicare Part D claims totaling $3K in drug costs for 157 beneficiaries.
Where is David Zimmerman, PAC located? ▼
David Zimmerman, PAC is located at 1900 N HIGLEY RD, Gilbert, AZ, 85234. Phone: (480) 543-2485.
What is David Zimmerman, PAC's NPI number? ▼
David Zimmerman, PAC's National Provider Identifier (NPI) is 1063494284, issued on 11/15/2005.
Does David Zimmerman, PAC prescribe more brand-name or generic drugs? ▼
David Zimmerman, PAC's prescribing is 13% brand-name and 87% generic drugs by claim count, with $1K in brand drug costs.
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 David Zimmerman, PAC prescribe most often? ▼
Based on 2023 Medicare Part D data, David Zimmerman, PAC's most frequently prescribed drugs include Prednisone, Naproxen, Ondansetron Odt. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does David Zimmerman, PAC accept Medicare? ▼
David Zimmerman, PAC appears in CMS Medicare data with 260 Part D claims and 157 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify David Zimmerman, PAC's credentials? ▼
David Zimmerman, PAC's NPI is 1063494284 with credentials PAC. 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.