Hepatitis CNephrotic Syndrome
Dr. John Peter Baron, DO
NPI1861471591PAC ID8921166919
- Medicare services, 2024
- 1,965
- Medicare patients, 2024
- 605
- Part D claims, 2024
- 2,050
- Publications
- 1
- Hospital affiliations
- 6
- Practice address
- 1 Quality Drive, Vacaville, CA 95688
- Practice phone
- Call (707) 624-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Baron'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 Baron is a nephrologist in Vacaville, California
Dr. Baron practices at Vacaville Medical Center in Vacaville, California, part of Kaiser Permanente.
Dr. Baron's NPI, 1861471591, was assigned on January 11, 2006. Dr. Baron graduated from Chicago College of Osteopathic Medicine at Midwestern University in 2002. Dr. Baron holds California license 20A 10040.
NPI and contact details
- NPI
- 1861471591NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8921166919
- NPI enumeration date
- January 11, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (707) 624-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 50
- Medical school graduation
- 2002
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 Baron practices at Vacaville Medical Center in Vacaville, California
Dr. Baron's primary practice is Vacaville Medical Center, at 1 Quality Drive, Vacaville, CA 95688 in Solano County. The practice phone is (707) 624-4000.
- Vacaville Medical Center1 Quality Drive, Vacaville, CA 95688 · Solano CountyPhone(707) 624-4000
Source: Dmand AI Affiliation Data
Dr. John Peter Baron is affiliated with 12 sites of care and 2 medical groups
Dr. Baron's primary practice is Vacaville Medical Center in Vacaville, California, part of Kaiser Permanente. Dr. Baron is also affiliated with Sutter Medical Center, Sacramento. The medical group on file is East Bay Nephrology Medical Group. Dmand AI also links Dr. Baron to 4 more hospitals, 3 dialysis centers, 2 group practices and clinics, 1 clinical lab and 1 medical group, each named with a free account.
Sutter Medical Center, SacramentoEast Bay Nephrology Medical Group4 hospitalsNames with a free account3 dialysis centersNames with a free account2 group practices and clinicsNames with a free account1 clinical labName with a free account1 medical groupName with a free account
See all 14 affiliations for Dr. BaronSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Peter Baron's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Baron practices, 12 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Vacaville Medical Center | Available with a free account |
| +11 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Peter Baron is one of 1,401 nephrologists in California
Nephrology is Dr. Baron's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Baron is board certified in certified physician executive by the American Association of Physician Leaders. Dr. Baron is licensed in California.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
Clinical focus
Dmand AI lists acute kidney failure, chronic kidney disease, fluid and electrolyte imbalances and kidney cysts among the conditions Dr. Baron treats.
Nephrologists near Dr. Baron
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
1,401nephrologists in California
7nephrologists in Vacaville
6nephrologists at Vacaville Medical CenterSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Peter Baron billed Medicare for 1,965 services in 2024
CMS data shows 1,965 Medicare services from Dr. Baron across 13 procedure codes in 2024, for 605 Medicare patients. Medicare paid $210,034 for them.
Medicare services, 20241,965
Medicare patients605
Paid by Medicare$210,034
Procedure codes13
Dr. Baron's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9462024: 1,56065%
- Other services
- 2023: 02024: 244
- Tests and treatments
- 2023: 782024: 161106%
Where Dr. Baron's Medicare services took place, 2024
- In an office1,41472%
- In a facility55128%
Dr. Baron compared with the California median for nephrologists, 2024
- Dr. Baron
- California median
- Medicare services
- 1,965vs 1,08481% above
- Medicare patients
- 605vs 30797% above
- Part D claims
- 1,807vs 95589% above
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Baron'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.
Need commercial claims for Dr. Baron?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Baron and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Peter Baron treated 605 Medicare patients in 2024, average age 75
CMS counts 605 Medicare patients who saw Dr. Baron in 2024. The largest group is 65 to 74, with 232 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 57% are also on Medicaid. Their average risk score is 2.90, 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. Baron's median patient age at 74, with 47% women.
Medicare patients, 2024605
Average age75
Average risk score2.90
Also on Medicaid57%
Dr. Baron's Medicare patients by age, 2024
Dr. Baron's Medicare patients by sex, 2024
- Women30250%
- Men30350%
Chronic conditions among Dr. Baron's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes61%
- Arthritis40%
- Heart failure34%
- Ischemic heart disease33%
- Mood disorders27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Baron's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women47%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Peter Baron wrote 2,050 Medicare Part D claims in 2024
In 2024, Dr. Baron wrote 2,050 Medicare Part D claims for 361 patients. 60% of them were for generic drugs. CMS names the drug for 1,807 of them, across 24 drugs with 11 or more claims each, at $1,024,820 in total drug cost. In 2023, CMS named 1,187 claims across 22 drugs.
Part D claims, 20242,050
Drugs named by CMS24
Total drug cost$1M
Part D patients361
Dr. Baron's Part D claims by kind of drug, 2024
- Generic1,221 claims60%
- Brand-name and other829 claims40%
Dr. Baron'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,1872024: 1,80752%
Drugs named by CMS: 24 in 2024, 22 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 Baron offers telehealth to Medicare patients
Dr. Baron accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Baron as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John Peter Baron has 1 publication on record
Dmand AI links 1 paper to Dr. Baron.
Papers1
Recent publications by Dr. Baron
See who Dr. Baron researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Baron works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Peter Baron received $6,042 in industry payments from 2016 to 2025
CMS Open Payments shows 124 general payments to Dr. Baron from 25 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 50% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $3,555.
General payments to Dr. Baron by program year, 2016 to 2025
General payments to Dr. Baron by kind, 2016 to 2025
$6Kin total
- Consulting fees$3,03750%
- Food and beverage$3,00550%
Companies that paid Dr. Baron the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Peter Baron has 1 award and honors on record
Dmand AI lists 1 award for Dr. Baron.
Awards and honors for Dr. Baron
- Undated
- ASN Fellow
Source: Dmand AI Professional Profile Data
Dr. John Peter Baron graduated from Chicago College of Osteopathic Medicine at Midwestern University
Dr. Baron graduated from Chicago College of Osteopathic Medicine at Midwestern University in 2002. Dr. Baron is a member of AAPL, ASN and Obesity Medical Association.
- Medical school
- Board certified in certified physician executive
- Board certified in internal medicine
- Board certified in nephrology
- Board certified in obesity medicine
- Board certified in 2007 - 2027
Source: Dmand AI Professional Profile Data
Dr. John Peter Baron accepts plans from 14 insurance carriers
Dr. Baron is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. Baron accepts, by number of carriers
- Medicare8
- PPO8
- HMO6
- POS4
- EPO3
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. John Peter Baron'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) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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 Baron
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 Baron's NPI number?
Dr. John Peter Baron's NPI number is 1861471591. It was assigned on January 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Peter Baron?
Dr. John Peter Baron is a nephrologist in Vacaville, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. John Peter Baron practice?
Dr. Baron practices at 1 Quality Drive, Vacaville, CA 95688. Dr. Baron's primary practice is Vacaville Medical Center in Vacaville, California, part of Kaiser Permanente. Dmand AI also links Dr. Baron to 4 hospitals, 3 dialysis centers, 2 group practices and clinics, 1 clinical lab and 1 medical group.
What is Dr. John Peter Baron's office phone number?
The practice phone on file for Dr. Baron is (707) 624-4000.
What is Dr. John Peter Baron's medical license number?
Dr. Baron holds California license 20A 10040.
Which hospitals is Dr. John Peter Baron affiliated with?
Dr. Baron practices at Vacaville Medical Center in Vacaville, California. Dr. Baron is also affiliated with Sutter Medical Center, Sacramento. Dmand AI links Dr. Baron to 4 more hospitals.
What medical group is Dr. John Peter Baron part of?
Dr. Baron is linked to East Bay Nephrology Medical Group. Dmand AI links Dr. Baron to 1 more medical group.
Does Dr. John Peter Baron accept Medicare?
Yes. CMS data shows Dr. Baron billed Medicare for 1,965 services in 2024, and Dr. Baron accepts Medicare assignment.
Does Dr. John Peter Baron offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Baron as offering telehealth services.
How many Medicare patients does Dr. John Peter Baron see?
CMS counts 605 Medicare patients who saw Dr. Baron in 2024, with an average age of 75.
Show 8 more questionsShow fewer questions
Is Dr. John Peter Baron board certified?
Yes. Dr. Baron is board certified in certified physician executive by the American Association of Physician Leaders.
What services does Dr. John Peter Baron bill to Medicare?
In 2024, Dr. Baron's most billed Medicare services were office visit, established patient (99215), medicare service (G2211) and hospital inpatient care (99233).
Where did Dr. John Peter Baron go to medical school?
Dr. Baron graduated from Chicago College of Osteopathic Medicine at Midwestern University in 2002.
What drugs does Dr. John Peter Baron prescribe most?
In 2024 Medicare Part D data, Dr. Baron's most prescribed drugs by claims were Farxiga, Amlodipine Besylate and Losartan Potassium.
Has Dr. John Peter Baron received payments from drug or device companies?
CMS Open Payments shows $6,042 in general payments to Dr. Baron from 25 companies from 2016 to 2025. The largest total came from Bayer HealthCare Pharmaceuticals Inc.
How long has Dr. John Peter Baron been practicing?
Dr. Baron graduated from medical school in 2002, 24 years ago.
Does Dr. John Peter Baron do research?
Dmand AI links 1 publication to Dr. Baron.
What insurance does Dr. John Peter Baron accept?
Dr. Baron is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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