Dr. James Christopher Stapakis, MD
- Medicare services, 2024
- 1,501
- Medicare patients, 2024
- 1,080
- Industry payments
- $161
- Affiliated sites
- 2
- Medical group
- 1
- Practice address
- 15243 Vanowen St, Vannuys, CA 91405
- Practice phone
- Call (818) 787-2020
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mazzocco Ambulatory Surgical Center (Vanowen St)
Surgery Center - Not Medicare-Certified · Vannuys, California
Find Dr. Stapakis' 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. James Christopher Stapakis is a diagnostic radiologist in Vannuys, California
Dr. Stapakis practices at Mazzocco Ambulatory Surgical Center (Vanowen St) in Vannuys, California.
Dr. Stapakis' NPI, 1376519462, was assigned on February 27, 2006. Dr. Stapakis graduated from University of California, San Francisco School of Medicine in 1989. Dr. Stapakis holds California license G78426.
- NPI
- 1376519462NPI Registry (opens in a new tab)
- NPI enumeration date
- February 27, 2006
- NPI status
- Active
- Practice phone
- (818) 787-2020
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. James Christopher Stapakis practices at Mazzocco Ambulatory Surgical Center (Vanowen St) in Vannuys, California
Dr. Stapakis' primary practice is Mazzocco Ambulatory Surgical Center (Vanowen St), at 15243 Vanowen St, Vannuys, CA 91405. The practice phone is (818) 787-2020.
- Mazzocco Ambulatory Surgical Center (Vanowen St)15243 Vanowen St, Vannuys, CA 91405Phone(818) 787-2020
Source: Dmand AI Affiliation Data
Dr. James Christopher Stapakis is affiliated with 2 sites of care and 1 medical group
Dr. Stapakis' primary practice is Mazzocco Ambulatory Surgical Center (Vanowen St) in Vannuys, California. The medical group on file is Universal Radiology Partners. Dmand AI also links Dr. Stapakis to 1 more group practice or clinic, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. James Christopher Stapakis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Stapakis practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mazzocco Ambulatory Surgical Center (Vanowen St) | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James Christopher Stapakis is one of 4,096 diagnostic radiologists in California
Diagnostic radiology is Dr. Stapakis' primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dr. Stapakis is licensed in California.
Specialties and state licenses
- Diagnostic radiology, CaliforniaPrimary
Diagnostic radiologists near Dr. Stapakis
Counts of diagnostic radiologists 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. James Christopher Stapakis billed Medicare for 1,501 services in 2024
CMS data shows 1,501 Medicare services from Dr. Stapakis across 31 procedure codes in 2024, for 1,080 Medicare patients. Medicare paid $35,374 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Stapakis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 2,1422024: 1,42833%
- Tests and treatments
- 2023: 1692024: 7357%
Dr. Stapakis compared with the California median for diagnostic radiologists, 2024
- Dr. Stapakis
- California median
- Medicare services
- 1,501vs 2,28134% below
- Medicare patients
- 1,080vs 1,34620% below
Medians across 3,734 diagnostic radiologists in California with Dmand AI profiles that report each measure.
Dr. Stapakis' 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. Stapakis and other diagnostic radiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James Christopher Stapakis treated 1,080 Medicare patients in 2024, average age 77
CMS counts 1,080 Medicare patients who saw Dr. Stapakis in 2024. The largest group is 75 to 84, with 381 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 31% are also on Medicaid. Their average risk score is 2.09, 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. Stapakis' median patient age at 82, with 64% women.
Dr. Stapakis' Medicare patients by age, 2024
Dr. Stapakis' Medicare patients by sex, 2024
- Women61957%
- Men46143%
Chronic conditions among Dr. Stapakis' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Ischemic heart disease47%
- Diabetes44%
- Chronic kidney disease39%
- Heart failure39%
- Anxiety36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Stapakis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 82
Patient panel by sex, all payers
- Women64%
- Men36%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
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Dr. James Christopher Stapakis received $161 in industry payments from 2016 to 2019
CMS Open Payments shows 9 general payments to Dr. Stapakis from 2 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 100% of the total. Cook Medical LLC paid the most, $139.
General payments to Dr. Stapakis by program year, 2016 to 2019
Companies that paid Dr. Stapakis the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James Christopher Stapakis graduated from University of California, San Francisco School of Medicine
Dr. Stapakis graduated from University of California, San Francisco School of Medicine in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. James Christopher Stapakis'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 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) |
| 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. James Christopher Stapakis
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What is Dr. James Christopher Stapakis' NPI number?
Dr. James Christopher Stapakis' NPI number is 1376519462. It was assigned on February 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. James Christopher Stapakis?
Dr. James Christopher Stapakis is a diagnostic radiologist in Vannuys, California. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. James Christopher Stapakis practice?
Dr. Stapakis practices at 15243 Vanowen St, Vannuys, CA 91405. Dr. Stapakis' primary practice is Mazzocco Ambulatory Surgical Center (Vanowen St) in Vannuys, California. Dmand AI also links Dr. Stapakis to 1 group practice or clinic.
What is Dr. James Christopher Stapakis' office phone number?
The practice phone on file for Dr. Stapakis is (818) 787-2020.
What is Dr. James Christopher Stapakis' medical license number?
Dr. Stapakis holds California license G78426.
What medical group is Dr. James Christopher Stapakis part of?
Dr. Stapakis is linked to Universal Radiology Partners.
Does Dr. James Christopher Stapakis accept Medicare?
Yes. CMS data shows Dr. Stapakis billed Medicare for 1,501 services in 2024.
How many Medicare patients does Dr. James Christopher Stapakis see?
CMS counts 1,080 Medicare patients who saw Dr. Stapakis in 2024, with an average age of 77.
What services does Dr. James Christopher Stapakis bill to Medicare?
In 2024, Dr. Stapakis' most billed Medicare services were diagnostic imaging (71045), diagnostic imaging (70450) and diagnostic imaging (74177).
Where did Dr. James Christopher Stapakis go to medical school?
Dr. Stapakis graduated from University of California, San Francisco School of Medicine in 1989.
Has Dr. James Christopher Stapakis received payments from drug or device companies?
CMS Open Payments shows $161 in general payments to Dr. Stapakis from 2 companies from 2016 to 2019. The largest total came from Cook Medical LLC.
How long has Dr. James Christopher Stapakis been practicing?
Dr. Stapakis graduated from medical school in 1989, 37 years ago.
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