NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1841642253 PA-C
Verify on CMS → Matthew Zimmermann, PA-C
Physician Assistant in Redding, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 150,974 in Physician Assistant, 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
3K
Medicare Part D claims · 122 beneficiaries · Physician Assistant avg: 790
Generic prescribing
93%
generic claims · 7% 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
Matthew Zimmermann, PA-C filed 2,934 Medicare Part D claims in 2023 as a Physician Assistant in Redding, California, prescribing 93% generic.
- 3K
- Part D claims, 2023
- 93%
- generic prescribing
- ≥88th
- 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.
Matthew Zimmermann, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,934 ≥ 88th percentile 88% 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
What does the federal data show about Matthew Zimmermann, PA-C?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
2,934 271% vs specialty avg
Specialty distribution in California
How Physician Assistant compares to other specialties among California 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 Physician Assistant. 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).
Matthew Zimmermann, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 415 KNOLLCREST DR STE 101, Redding, CA, 96002, with a listed phone of (707) 703-5600. NPI 1841642253 was issued on 07/09/2016.
Medicare Part D records for calendar year 2023 show 2,934 prescription claims written by this provider, covering 122 Medicare beneficiaries and totaling roughly $589K in drug spend, split 7% brand-name and 93% generic by claim count.
Physician Assistant is a high-volume specialty nationwide, with 150,974 enrolled providers across 56 states and an average of 790 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 | 1841642253 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA-C |
| Gender | Male |
| NPI Issued | 07/09/2016 |
Hospital and facility affiliations
Facilities where Matthew Zimmermann, PA-C 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.
County OF Lake
Lucerne, 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 Matthew Zimmermann, PA-C. To verify Matthew Zimmermann, PA-C'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 · Generic-heavy
Matthew Zimmermann, PA-C - brand share 7.0%
Physician Assistant average
7% brand-name claims vs 93% generic, on 2,934 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.
2,934
Total Claims
$589K
Total Drug Cost
122
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,217
- Total Day Supply
- 94,620
- Brand vs Generic
- 7% brand / 93% generic
- Brand Drug Cost
- $406K
- Generic Drug Cost
- $183K
Patient Demographics
- Average Patient Age
- 55.5 years
- Avg HCC Risk Score
- 1.17
- Gender Split
- 46% female / 54% male
- Age Distribution
- <65: 84, 65-74: 28, 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 Matthew Zimmermann, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Olanzapine
Olanzapine
191 claims
- Trazodone Hcl
Trazodone Hcl
160 claims
- Benztropine Mesylate
Benztropine Mesylate
155 claims
- Sertraline Hcl
Sertraline Hcl
136 claims
- Quetiapine Fumarate
Quetiapine Fumarate
130 claims
- Aripiprazole
Aripiprazole
124 claims
- Lithium Carbonate
Lithium Carbonate
123 claims
- Bupropion Xl
Bupropion Xl
112 claims
| Drug | Claims |
|---|---|
| Olanzapine | 191 |
| Trazodone Hcl | 160 |
| Benztropine Mesylate | 155 |
| Sertraline Hcl | 136 |
| Quetiapine Fumarate | 130 |
| Aripiprazole | 124 |
| Lithium Carbonate | 123 |
| Bupropion Xl Bupropion Hcl | 112 |
| Divalproex Sodium | 109 |
| Prazosin Hcl | 106 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Matthew Zimmermann, PA-C fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Matthew Zimmermann, PA-C's 2,934 claims are above the specialty average of 790.
Nearby Physician Assistant Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Zimmermann.
Dr. Marcia -Galbraith
PA
Stockton, CA
Dr. Danny Abad
PA
Orange, CA
Dr. Lea Dominique Abadies
PA
Tustin, CA
Dr. Rea Elizabeth Abaniel
P.A.-C
Seal Beach, CA
Dr. Ramina Abbasi
PA-C
Signal Hill, CA
Compare Physician Assistant 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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Physician Assistant 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 Matthew Zimmermann, PA-C's specialty? ▼
Matthew Zimmermann, PA-C specializes in Physician Assistant and practices in Redding, California. Credentials: PA-C.
How much does Matthew Zimmermann, PA-C prescribe under Medicare Part D? ▼
In 2023, Matthew Zimmermann, PA-C wrote 2,934 Medicare Part D claims totaling $589K in drug costs for 122 beneficiaries.
Where is Matthew Zimmermann, PA-C located? ▼
Matthew Zimmermann, PA-C is located at 415 KNOLLCREST DR STE 101, Redding, CA, 96002. Phone: (707) 703-5600.
What is Matthew Zimmermann, PA-C's NPI number? ▼
Matthew Zimmermann, PA-C's National Provider Identifier (NPI) is 1841642253, issued on 07/09/2016.
Does Matthew Zimmermann, PA-C prescribe more brand-name or generic drugs? ▼
Matthew Zimmermann, PA-C's prescribing is 7% brand-name and 93% generic drugs by claim count, with $406K in brand drug costs.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does Matthew Zimmermann, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Matthew Zimmermann, PA-C's most frequently prescribed drugs include Olanzapine, Trazodone Hcl, Benztropine Mesylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Matthew Zimmermann, PA-C accept Medicare? ▼
Matthew Zimmermann, PA-C appears in CMS Medicare data with 2,934 Part D claims and 122 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Matthew Zimmermann, PA-C's credentials? ▼
Matthew Zimmermann, PA-C's NPI is 1841642253 with credentials PA-C. 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.