NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1225119621 PAC
Verify on CMS → Brian Peterson, PAC
Emergency Medicine Physician in Alpine, 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 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
540
Medicare Part D claims · 91 beneficiaries · Emergency Medicine Physician avg: 352
MIPS score
77/100
▼ 7 pts below national avg 83.5 · Above neutral
Industry payments
$19.7
1 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Brian Peterson, PAC reported a CMS MIPS final score of 77/100 - below the 83.5 national average - and filed 540 Medicare Part D claims in 2023.
- 77/100
- MIPS score · -7 vs avg
- 540
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥17th
- pct among measured MIPS (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.
Brian Peterson, PAC's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
77 ≥ 17th percentile 17% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Brian Peterson, PAC sits
This provider among emergency medicine physician peers
Across the 14,017 emergency medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Brian Peterson, PAC writes more Part D claims than 93% of them and scores higher on MIPS quality than 14% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one emergency medicine physician peer from a representative sample of 60; the gold marker is Brian Peterson, PAC. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Brian Peterson, PAC practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Brian Peterson, PAC?
Below national averagePrimary specialty
Emergency Medicine Physician
Medicare Part D claims
540 53% vs specialty avg
MIPS final score
77/100 6.5 pts vs avg
Specialty distribution in California
How Emergency Medicine Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Brian Peterson, PAC's 2023 MIPS final score plotted against the Emergency Medicine Physician national average
- MIPS Final Score
- 77/100
- vs 83.5 national avg · 2023 performance year
MIPS final score (Emergency Medicine Physician) - 77/100 vs national avg 83.5
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).
Brian Peterson, PAC appears in the CMS NPPES registry as an Emergency Medicine Physician provider holding PAC credentials at 1730 ALPINE BLVD STE 109B, Alpine, CA, 91901, with a listed phone of (619) 326-4445. NPI 1225119621 was issued on 10/18/2006.
Medicare Part D records for calendar year 2023 show 540 prescription claims written by this provider, covering 91 Medicare beneficiaries and totaling roughly $30K in drug spend, with an opioid prescribing rate of 10.2%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 77/100 for the 2023 performance year (Quality 65.7, Cost 35.6), compared with the 83.5 average among clinicians with a measured score.
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 | 1225119621 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | PAC |
| Gender | Male |
| NPI Issued | 10/18/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
76.9611
Final Score
Measured-score avg: 83.5
65.6855
Quality
35.6229
Cost
Reporting: Individual
Hospital and facility affiliations
Facilities where Brian Peterson, PAC 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.
Mary Gessner-Peterson Medical Group Inc
Alpine, 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).
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 Brian Peterson, PAC. Source: openpaymentsdata.cms.gov.
Total received
$20
Largest payer
Lilly USA, LLC
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 - 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 Brian Peterson, PAC. To verify Brian Peterson, PAC'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
540
Total Claims
$30K
Total Drug Cost
91
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 550
- Total Day Supply
- 15,041
- Generic Drug Cost
- $11K
- Opioid Claims
- 55 (10.2% rate)
- Antibiotic Claims
- 18
Patient Demographics
- Average Patient Age
- 68.7 years
- Avg HCC Risk Score
- 2.70
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 27, 65-74: 40, 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 Brian Peterson, PAC prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
36 claims
- Metoprolol Tartrate
Metoprolol Tartrate
31 claims
- Levothyroxine Sodium
Levothyroxine Sodium
19 claims
- Oxycodone Hcl
Oxycodone Hcl
19 claims
- Valsartan
Valsartan
19 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
18 claims
- Potassium Chloride
Potassium Chloride
18 claims
- Gemfibrozil
Gemfibrozil
16 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 36 |
| Metoprolol Tartrate | 31 |
| Levothyroxine Sodium | 19 |
| Oxycodone Hcl | 19 |
| Valsartan | 19 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 18 |
| Potassium Chloride | 18 |
| Gemfibrozil | 16 |
| Omeprazole | 15 |
| Gabapentin | 14 |
* 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 Brian Peterson, 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
Brian Peterson, PAC's 540 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 Peterson.
Dr. Cooper Aakhus
MD
Stanford, CA
Dr. Pyra Aarden
MD
Martinez, CA
Dr. Neal Aaron
D.O.
Encinitas, CA
Eric Aaserude
Walnut Creek, CA
Dr. Nader Abas
MD
Barstow, CA
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 California 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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Medical Specialties Explained
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Frequently Asked Questions
What is Brian Peterson, PAC's specialty? ▼
Brian Peterson, PAC specializes in Emergency Medicine Physician and practices in Alpine, California. Credentials: PAC.
How much does Brian Peterson, PAC prescribe under Medicare Part D? ▼
In 2023, Brian Peterson, PAC wrote 540 Medicare Part D claims totaling $30K in drug costs for 91 beneficiaries.
What is Brian Peterson, PAC's Medicare quality score? ▼
Brian Peterson, PAC has a CMS MIPS Final Score of 77/100 (Quality: 65.7, Cost: 35.6). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Brian Peterson, PAC located? ▼
Brian Peterson, PAC is located at 1730 ALPINE BLVD STE 109B, Alpine, CA, 91901. Phone: (619) 326-4445.
What is Brian Peterson, PAC's NPI number? ▼
Brian Peterson, PAC's National Provider Identifier (NPI) is 1225119621, issued on 10/18/2006.
Does Brian Peterson, PAC prescribe opioids? ▼
Yes, Brian Peterson, PAC had 55 opioid claims in 2023 with an opioid prescribing rate of 10.2%.
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 Brian Peterson, PAC prescribe most often? ▼
Based on 2023 Medicare Part D data, Brian Peterson, PAC's most frequently prescribed drugs include Atorvastatin Calcium, Metoprolol Tartrate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Brian Peterson, PAC accept Medicare? ▼
Brian Peterson, PAC appears in CMS Medicare data with 540 Part D claims and 91 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Brian Peterson, PAC's credentials? ▼
Brian Peterson, PAC's NPI is 1225119621 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.