Dr. John Peter Zopfi III, DO
- Medicare services, 2024
- 195
- Medicare patients, 2024
- 156
- Part D claims, 2024
- 75
- Hospital affiliations
- 2
- Industry payments
- $3,934
- Practice address
- 1200 B Gale Wilson Blvd, Fairfield, CA 94533
- Practice phone
- Call (707) 646-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Zopfi's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John Peter Zopfi III is a general surgeon in Fairfield, California
Dr. Zopfi practices at NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare.
Dr. Zopfi's NPI, 1275581886, was assigned on May 5, 2006. Dr. Zopfi graduated from WesternU College of Osteopathic Medicine of the Pacific in 1986. Dr. Zopfi holds California license 20A5987.
- NPI
- 1275581886NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204862675
- NPI enumeration date
- May 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 646-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Peter Zopfi III practices at NorthBay Medical Center in Fairfield, California
Dr. Zopfi's primary practice is NorthBay Medical Center, at 1200 B Gale Wilson Blvd, Fairfield, CA 94533 in Solano County. The practice phone is (707) 646-5000.
- NorthBay Medical Center1200 B Gale Wilson Blvd, Fairfield, CA 94533 · Solano CountyPhone(707) 646-5000
Source: Dmand AI Affiliation Data
Dr. John Peter Zopfi III is affiliated with 5 sites of care and 3 medical groups
Dr. Zopfi's primary practice is NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare. Dr. Zopfi is also affiliated with Sutter Solano Medical Center. The medical group on file is NorthBay Medical Center. Dmand AI also links Dr. Zopfi to 3 more group practices and clinics and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Peter Zopfi III's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zopfi practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| NorthBay Medical Center | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across NorthBay Healthcare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John Peter Zopfi III is one of 2,926 general surgeons in California
Surgery is Dr. Zopfi's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Zopfi is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists chest trauma, colon removal, groin hernia surgery, multiple traumatic injuries, non-surgical back problems and traumatic coma among the conditions Dr. Zopfi treats.
General surgeons near Dr. Zopfi
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Peter Zopfi III billed Medicare for 195 services in 2024
CMS data shows 195 Medicare services from Dr. Zopfi across 7 procedure codes in 2024, for 156 Medicare patients. Medicare paid $23,095 for them.
Dr. Zopfi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2332024: 19516%
Where Dr. Zopfi's Medicare services took place, 2024
- In an office8443%
- In a facility11157%
Dr. Zopfi compared with the California median for general surgeons, 2024
- Dr. Zopfi
- California median
- Medicare services
- 195vs 16617% above
- Medicare patients
- 156vs 12129% above
- Part D claims
- 47vs 3438% above
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Zopfi's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zopfi and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Peter Zopfi III treated 156 Medicare patients in 2024, average age 76
CMS counts 156 Medicare patients who saw Dr. Zopfi in 2024. The largest group is 65 to 74, with 54 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 31% are also on Medicaid. Their average risk score is 1.53, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Zopfi's median patient age at 52, with 37% women.
Dr. Zopfi's Medicare patients by age, 2024
Dr. Zopfi's Medicare patients by sex, 2024
- Women7246%
- Men8454%
Chronic conditions among Dr. Zopfi's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis53%
- Diabetes38%
- Ischemic heart disease35%
- Chronic kidney disease33%
- Heart failure31%
- Mood disorders28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zopfi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 52
Patient panel by sex, all payers
- Women37%
- Men62%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Peter Zopfi III wrote 75 Medicare Part D claims in 2024
In 2024, Dr. Zopfi wrote 75 Medicare Part D claims for 46 patients. 99% of them were for generic drugs. CMS names the drug for 47 of them, across 2 drugs with 11 or more claims each, at $233 in total drug cost. In 2023, CMS named 45 claims across 2 drugs.
Dr. Zopfi's Part D claims by kind of drug, 2024
- Generic74 claims99%
- Brand-name and other1 claims1%
Dr. Zopfi'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. Zopfi's Part D claims, 2024
- Opioids52%39 of 75 claims
- Antibiotics31%23 of 75 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: 452024: 474%
Drugs named by CMS: 2 in 2024, 2 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
Dr. John Peter Zopfi III ranks in the 92nd percentile for hernia repair - groin (open) in Medicare
Dr. Zopfi accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 13 procedures of hernia repair - groin (open) by Dr. Zopfi, more than 92% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Zopfi ranks in Medicare procedure volume
- Hernia repair - groin (open)
- 92nd percentile13 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. John Peter Zopfi III received $3,934 in industry payments from 2017 to 2025
CMS Open Payments shows 46 general payments to Dr. Zopfi from 20 drug and device companies from 2017 to 2025. Travel and lodging make up the largest share, 38% of the total. KLS-Martin L.P. paid the most, $1,463.
General payments to Dr. Zopfi by program year, 2017 to 2025
General payments to Dr. Zopfi by kind, 2017 to 2025
- Travel and lodging$1,48638%
- Food and beverage$1,42836%
- Education$1,02026%
Companies that paid Dr. Zopfi the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Peter Zopfi III graduated from WesternU College of Osteopathic Medicine of the Pacific
Dr. Zopfi graduated from WesternU College of Osteopathic Medicine of the Pacific in 1986. Dr. Zopfi is a member of AOA.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. John Peter Zopfi III accepts plans from 8 insurance carriers
Dr. Zopfi is in network with 8 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- Humana
- Regence Health Plans
- CMS Medicare
- Molina
Plan types Dr. Zopfi accepts, by number of carriers
- Medicare8
- PPO6
- HMO3
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. John Peter Zopfi III'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. John Peter Zopfi III
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. John Peter Zopfi III's NPI number?
Dr. John Peter Zopfi III's NPI number is 1275581886. It was assigned on May 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Peter Zopfi III?
Dr. John Peter Zopfi III is a general surgeon in Fairfield, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John Peter Zopfi III practice?
Dr. Zopfi practices at 1200 B Gale Wilson Blvd, Fairfield, CA 94533. Dr. Zopfi's primary practice is NorthBay Medical Center in Fairfield, California, part of NorthBay Healthcare. Dmand AI also links Dr. Zopfi to 3 group practices and clinics and 2 medical groups.
What is Dr. John Peter Zopfi III's office phone number?
The practice phone on file for Dr. Zopfi is (707) 646-5000.
What is Dr. John Peter Zopfi III's medical license number?
Dr. Zopfi holds California license 20A5987.
Which hospitals is Dr. John Peter Zopfi III affiliated with?
Dr. Zopfi practices at NorthBay Medical Center in Fairfield, California. Dr. Zopfi is also affiliated with Sutter Solano Medical Center.
What medical group is Dr. John Peter Zopfi III part of?
Dr. Zopfi is linked to NorthBay Medical Center. Dmand AI links Dr. Zopfi to 2 more medical groups.
Does Dr. John Peter Zopfi III accept Medicare?
Yes. CMS data shows Dr. Zopfi billed Medicare for 195 services in 2024, and Dr. Zopfi accepts Medicare assignment.
How many Medicare patients does Dr. John Peter Zopfi III see?
CMS counts 156 Medicare patients who saw Dr. Zopfi in 2024, with an average age of 76.
What services does Dr. John Peter Zopfi III bill to Medicare?
In 2024, Dr. Zopfi's most billed Medicare services were hospital inpatient care (99233), office visit, new patient (99204) and hospital inpatient care (99223).
Show 5 more questionsShow fewer questions
Where did Dr. John Peter Zopfi III go to medical school?
Dr. Zopfi graduated from WesternU College of Osteopathic Medicine of the Pacific in 1986.
What drugs does Dr. John Peter Zopfi III prescribe most?
In 2024 Medicare Part D data, Dr. Zopfi's most prescribed drugs by claims were Hydrocodone-Acetaminophen and Cephalexin.
Has Dr. John Peter Zopfi III received payments from drug or device companies?
CMS Open Payments shows $3,934 in general payments to Dr. Zopfi from 20 companies from 2017 to 2025. The largest total came from KLS-Martin L.P.
How long has Dr. John Peter Zopfi III been practicing?
Dr. Zopfi graduated from medical school in 1986, 40 years ago.
What insurance does Dr. John Peter Zopfi III accept?
Dr. Zopfi is in network with 8 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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