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Dr. William James Peterson, MD
NPI1841236072
- Part D claims, 2024
- 177
- Publications
- 25
- Hospital affiliations
- 1
- Industry payments
- $20
- Medical group
- 1
- Practice address
- 2500 Alhambra Avenue, Martinez, CA 94553
- Practice phone
- Call (925) 370-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. William James Peterson is an emergency medicine physician in Martinez, California
Dr. Peterson practices at Contra Costa Regional Medical Center in Martinez, California, part of State of California.
Dr. Peterson's NPI, 1841236072, was assigned on June 22, 2006. Dr. Peterson graduated from Drexel University College Of Medicine in 1984. Dr. Peterson holds California license G56798.
NPI and contact details
- NPI
- 1841236072NPI Registry (opens in a new tab)
- NPI enumeration date
- June 22, 2006
- NPI status
- Active
- Practice phone
- (925) 370-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William James Peterson practices at Contra Costa Regional Medical Center in Martinez, California
Dr. Peterson's primary practice is Contra Costa Regional Medical Center, at 2500 Alhambra Avenue, Martinez, CA 94553 in Contra Costa County. The practice phone is (925) 370-5000.
- Contra Costa Regional Medical Center2500 Alhambra Avenue, Martinez, CA 94553 · Contra Costa CountyPhone(925) 370-5000
Source: Dmand AI Affiliation Data
Dr. William James Peterson is affiliated with 1 site of care and 1 medical group
Dr. Peterson's primary practice is Contra Costa Regional Medical Center in Martinez, California, part of State of California. The medical group on file is West County Adult Mental Health Services. Dr. Peterson's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William James Peterson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Peterson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Contra Costa Regional Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William James Peterson is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Peterson's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Peterson is board certified in emergency medicine by the American Board of Emergency Medicine. Dr. Peterson is licensed in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Dr. Peterson
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
7,423emergency medicine physicians in California18emergency medicine physicians in Martinez16emergency medicine physicians at Contra Costa Regional Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William James Peterson's patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Dr. Peterson's median patient age at 73, with 100% women.
Dr. Peterson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. William James Peterson wrote 177 Medicare Part D claims in 2024
In 2024, Dr. Peterson wrote 177 Medicare Part D claims for 101 patients. 94% of them were for generic drugs. CMS names the drug for 92 of them, across 5 drugs with 11 or more claims each, at $328 in total drug cost. In 2023, CMS named 95 claims across 5 drugs.
Part D claims, 2024177
Drugs named by CMS5
Total drug cost$328
Part D patients101
Dr. Peterson's Part D claims by kind of drug, 2024
- Generic167 claims94%
- Brand-name and other10 claims6%
Dr. Peterson's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Peterson's Part D claims, 2024
- Opioids10%17 of 177 claims
- Antibiotics23%41 of 177 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 952024: 923%
Drugs named by CMS: 5 in 2024, 5 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. William James Peterson has 25 publications on record
Dmand AI links 25 papers to Dr. Peterson, published from 2014 to 2024. 2021 was the busiest year, with 5. The most frequent topics are COVID-19, Clinical Competence and Emergency Medicine. Dr. Peterson has published most often in West J Emerg Med. Dr. Peterson's most frequent co-authors are Brendan William Munzer, MD, Michelle M. Daniel, MD and Deena Khaled Khamees, MD.
Papers25
Years published2014 to 2024
Dr. Peterson's papers by year, 2014 to 2024
Topics Dr. Peterson writes about most
- COVID-19
- Clinical Competence
- Emergency Medicine
- Pandemics
- Students, Medical
- Curriculum
- Education, Medical
- Internship and Residency
Dr. Peterson's most frequent co-authors
- Brendan William Munzer, MD6 shared papers
- Michelle M. Daniel, MD4 shared papers
- Deena Khaled Khamees, MD4 shared papers
Recent publications by Dr. Peterson
Anesthesia, ConductionEmergency Service, HospitalNerve Block
Antifungal AgentsDiabetes MellitusDiabetic Ketoacidosis
See who Dr. Peterson researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Peterson works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. William James Peterson received $20 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Peterson from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Medline Industries, Inc. paid the most, $20.
Companies that paid Dr. Peterson the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William James Peterson graduated from Drexel University College Of Medicine
Dr. Peterson graduated from Drexel University College Of Medicine in 1984.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. William James Peterson's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William James Peterson
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William James Peterson's NPI number?
Dr. William James Peterson's NPI number is 1841236072. It was assigned on June 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William James Peterson?
Dr. William James Peterson is an emergency medicine physician in Martinez, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. William James Peterson practice?
Dr. Peterson practices at 2500 Alhambra Avenue, Martinez, CA 94553. Dr. Peterson's primary practice is Contra Costa Regional Medical Center in Martinez, California, part of State of California.
What is Dr. William James Peterson's office phone number?
The practice phone on file for Dr. Peterson is (925) 370-5000.
What is Dr. William James Peterson's medical license number?
Dr. Peterson holds California license G56798.
Which hospitals is Dr. William James Peterson affiliated with?
Dr. Peterson practices at Contra Costa Regional Medical Center in Martinez, California.
What medical group is Dr. William James Peterson part of?
Dr. Peterson is linked to West County Adult Mental Health Services.
Is Dr. William James Peterson board certified?
Yes. Dr. Peterson is board certified in emergency medicine by the American Board of Emergency Medicine.
Where did Dr. William James Peterson go to medical school?
Dr. Peterson graduated from Drexel University College Of Medicine in 1984.
What drugs does Dr. William James Peterson prescribe most?
In 2024 Medicare Part D data, Dr. Peterson's most prescribed drugs by claims were Nabumetone, Ibuprofen and Baclofen.
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Has Dr. William James Peterson received payments from drug or device companies?
CMS Open Payments shows $20 in general payments to Dr. Peterson from 1 company from 2025 to 2025. The largest total came from Medline Industries, Inc.
How long has Dr. William James Peterson been practicing?
Dr. Peterson graduated from medical school in 1984, 42 years ago.
Does Dr. William James Peterson do research?
Dmand AI links 25 publications to Dr. Peterson, published from 2014 to 2024.
Who does Dr. William James Peterson publish with?
Dr. Peterson's most frequent co-authors are Brendan William Munzer, MD (6 shared papers), Michelle M. Daniel, MD (4 shared papers) and Deena Khaled Khamees, MD (4 shared papers).
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