Dr. John P. Jancarik, MD
- Medicare services, 2024
- 69
- Medicare patients, 2024
- 35
- Part D claims, 2024
- 472
- Hospital affiliations
- 1
- Industry payments
- $96
- Practice address
- 975 Sereno Dr, Vallejo, CA 94589
- Practice phone
- Call (707) 651-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Jancarik's professional email, personal email and mobile number
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Dr. John P. Jancarik is a nephrologist in Vallejo, California
Dr. Jancarik practices at Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente.
Dr. Jancarik's NPI, 1073515292, was assigned on June 1, 2005. Dr. Jancarik graduated from University of Pittsburgh School of Medicine in 1999. Dr. Jancarik's Pennsylvania license number on file is MD074336.
- NPI
- 1073515292NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2163492877
- NPI enumeration date
- June 1, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 651-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John P. Jancarik practices at Vallejo Medical Center in Vallejo, California
Dr. Jancarik's primary practice is Vallejo Medical Center, at 975 Sereno Dr, Vallejo, CA 94589 in Solano County. The practice phone is (707) 651-1000.
- Vallejo Medical Center975 Sereno Dr, Vallejo, CA 94589 · Solano CountyPhone(707) 651-1000
Source: Dmand AI Affiliation Data
Dr. John P. Jancarik is affiliated with 3 sites of care and 1 medical group
Dr. Jancarik's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Jancarik to 1 more home health agency and 1 hospice, 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 P. Jancarik's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Jancarik practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Vallejo Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John P. Jancarik is one of 1,401 nephrologists in California
Nephrology is Dr. Jancarik's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Jancarik is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Jancarik's licenses on file in 3 states: Pennsylvania, California and Ohio.
Specialties and state licenses
- Nephrology, PennsylvaniaPrimary
- California license
- Ohio license
Clinical focus
Dmand AI lists kidney failure and sepsis among the conditions Dr. Jancarik treats.
Nephrologists near Dr. Jancarik
Counts of nephrologists 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 P. Jancarik billed Medicare for 69 services in 2024
CMS data shows 69 Medicare services from Dr. Jancarik across 2 procedure codes in 2024, for 35 Medicare patients. Medicare paid $4,656 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Jancarik's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 862024: 6920%
Dr. Jancarik compared with the California median for nephrologists, 2024
- Dr. Jancarik
- California median
- Medicare services
- 69vs 1,08494% below
- Medicare patients
- 35vs 30789% below
- Part D claims
- 205vs 95579% below
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Jancarik'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. Jancarik?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Jancarik and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John P. Jancarik treated 35 Medicare patients in 2024, average age 65
CMS counts 35 Medicare patients who saw Dr. Jancarik in 2024. The largest group is under 65, with 17 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 69% are also on Medicaid. Their average risk score is 2.28, 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. Jancarik's median patient age at 71, with 50% women.
Dr. Jancarik's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Jancarik's Medicare patients by sex, 2024
- Women1131%
- Men2469%
Chronic conditions among Dr. Jancarik's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes66%
- Heart failure51%
- Ischemic heart disease46%
- Chronic kidney disease43%
- Mood disorders40%
- Arthritis34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Jancarik's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John P. Jancarik wrote 472 Medicare Part D claims in 2024
In 2024, Dr. Jancarik wrote 472 Medicare Part D claims for 143 patients. 87% of them were for generic drugs. CMS names the drug for 205 of them, across 11 drugs with 11 or more claims each, at $3,034 in total drug cost. In 2023, CMS named 193 claims across 10 drugs.
Dr. Jancarik's Part D claims by kind of drug, 2024
- Generic410 claims87%
- Brand-name and other62 claims13%
Dr. Jancarik'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. Jancarik's Part D claims, 2024
- Opioids2%11 of 472 claims
- Antibiotics13%62 of 472 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: 1932024: 2056%
Drugs named by CMS: 11 in 2024, 10 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
How Dr. John P. Jancarik takes part in Medicare
Dr. Jancarik accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John P. Jancarik received $96 in industry payments from 2023 to 2025
CMS Open Payments shows 2 general payments to Dr. Jancarik from 2 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Collegium Pharmaceutical, Inc. paid the most, $64.
General payments to Dr. Jancarik by program year, 2023 to 2025
Companies that paid Dr. Jancarik the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John P. Jancarik has 1 award and honors on record
Dmand AI lists 1 award for Dr. Jancarik, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Jancarik
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. John P. Jancarik graduated from University of Pittsburgh School of Medicine
Dr. Jancarik graduated from University of Pittsburgh School of Medicine in 1999.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. John P. Jancarik accepts plans from 2 insurance carriers
Dr. Jancarik is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Jancarik accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. John P. Jancarik'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) |
| 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 P. Jancarik
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 P. Jancarik's NPI number?
Dr. John P. Jancarik's NPI number is 1073515292. It was assigned on June 1, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John P. Jancarik?
Dr. John P. Jancarik is a nephrologist in Vallejo, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. John P. Jancarik practice?
Dr. Jancarik practices at 975 Sereno Dr, Vallejo, CA 94589. Dr. Jancarik's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. Dmand AI also links Dr. Jancarik to 1 home health agency and 1 hospice.
What is Dr. John P. Jancarik's office phone number?
The practice phone on file for Dr. Jancarik is (707) 651-1000.
What is Dr. John P. Jancarik's medical license number?
Dr. Jancarik's Pennsylvania license number on file is MD074336, one of the licenses on file in 3 states.
Which states has Dr. John P. Jancarik been licensed in?
Dmand AI has state licenses on file for Dr. Jancarik in Pennsylvania (2000 to 2014), California (2013 to 2027) and Ohio (2004 to 2014).
Which hospitals is Dr. John P. Jancarik affiliated with?
Dr. Jancarik practices at Vallejo Medical Center in Vallejo, California.
What medical group is Dr. John P. Jancarik part of?
Dr. Jancarik is linked to The Permanente Medical Group, Inc.
Does Dr. John P. Jancarik accept Medicare?
Yes. CMS data shows Dr. Jancarik billed Medicare for 69 services in 2024, and Dr. Jancarik accepts Medicare assignment.
How many Medicare patients does Dr. John P. Jancarik see?
CMS counts 35 Medicare patients who saw Dr. Jancarik in 2024, with an average age of 65.
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Is Dr. John P. Jancarik board certified?
Yes. Dr. Jancarik is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. John P. Jancarik bill to Medicare?
In 2024, Dr. Jancarik's most billed Medicare services were hospital inpatient care (99232) and hospital inpatient care (99238).
Where did Dr. John P. Jancarik go to medical school?
Dr. Jancarik graduated from University of Pittsburgh School of Medicine in 1999.
What drugs does Dr. John P. Jancarik prescribe most?
In 2024 Medicare Part D data, Dr. Jancarik's most prescribed drugs by claims were Metoprolol Succinate, Atorvastatin Calcium and Pantoprazole Sodium.
Has Dr. John P. Jancarik received payments from drug or device companies?
CMS Open Payments shows $96 in general payments to Dr. Jancarik from 2 companies from 2023 to 2025. The largest total came from Collegium Pharmaceutical, Inc.
How long has Dr. John P. Jancarik been practicing?
Dr. Jancarik graduated from medical school in 1999, 27 years ago.
What insurance does Dr. John P. Jancarik accept?
Dr. Jancarik is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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