Dr. Jason J. Jun, MD
- Part D claims, 2024
- 287
- Publications
- 2
- Hospital affiliations
- 1
- Industry payments
- $299
- 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
Find Dr. Jun'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. Jason J. Jun is an ophthalmologist in Martinez, California
Dr. Jun practices at Contra Costa Regional Medical Center in Martinez, California, part of State of California.
Dr. Jun's NPI, 1952565525, was assigned on July 14, 2008. Dr. Jun holds California license A120840.
- NPI
- 1952565525NPI Registry (opens in a new tab)
- NPI enumeration date
- July 14, 2008
- NPI status
- Active
- Practice phone
- (925) 370-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Jason J. Jun practices at Contra Costa Regional Medical Center in Martinez, California
Dr. Jun'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. Jason J. Jun is affiliated with 1 site of care and 1 medical group
Dr. Jun'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. Jun'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. Jason J. Jun's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Jun 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
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across State of California and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jason J. Jun is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Jun's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Jun is licensed in California.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
Ophthalmologists near Dr. Jun
Counts of ophthalmologists 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. Jason J. Jun's patients have a median age of 72
Across all payers, Dmand AI patient panel data puts Dr. Jun's median patient age at 72, with 62% women.
Dr. Jun's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women62%
- Men38%
Source: Dmand AI Patient Panel Data
Dr. Jason J. Jun wrote 287 Medicare Part D claims in 2024
In 2024, Dr. Jun wrote 287 Medicare Part D claims for 89 patients. 46% of them were for generic drugs. CMS names the drug for 251 of them, across 9 drugs with 11 or more claims each, at $26,441 in total drug cost. In 2023, CMS named 197 claims across 5 drugs.
Dr. Jun's Part D claims by kind of drug, 2024
- Generic132 claims46%
- Brand-name155 claims54%
Dr. Jun'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: 1972024: 25127%
Drugs named by CMS: 9 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
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Jason J. Jun has 2 publications on record
Dmand AI links 2 papers to Dr. Jun in 2018. Dr. Jun's most frequent co-authors are Anthony J. Aldave, MD, Florence Cabot, MD and David Y. Huang, MD.
Dr. Jun's most frequent co-authors
Recent publications by Dr. Jun
See who Dr. Jun researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Jun works with, so you can find a warm path to the right ophthalmologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Jason J. Jun received $299 in industry payments from 2018 to 2024
CMS Open Payments shows 8 general payments to Dr. Jun from 4 drug and device companies from 2018 to 2024. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $150.
General payments to Dr. Jun by program year, 2018 to 2024
Companies that paid Dr. Jun the most, 2018 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Jason J. Jun'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) |
| 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. Jason J. Jun
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. Jason J. Jun's NPI number?
Dr. Jason J. Jun's NPI number is 1952565525. It was assigned on July 14, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Jason J. Jun?
Dr. Jason J. Jun is an ophthalmologist in Martinez, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Jason J. Jun practice?
Dr. Jun practices at 2500 Alhambra Avenue, Martinez, CA 94553. Dr. Jun's primary practice is Contra Costa Regional Medical Center in Martinez, California, part of State of California.
What is Dr. Jason J. Jun's office phone number?
The practice phone on file for Dr. Jun is (925) 370-5000.
What is Dr. Jason J. Jun's medical license number?
Dr. Jun holds California license A120840.
Which hospitals is Dr. Jason J. Jun affiliated with?
Dr. Jun practices at Contra Costa Regional Medical Center in Martinez, California.
What medical group is Dr. Jason J. Jun part of?
Dr. Jun is linked to West County Adult Mental Health Services.
What drugs does Dr. Jason J. Jun prescribe most?
In 2024 Medicare Part D data, Dr. Jun's most prescribed drugs by claims were Prednisolone Acetate, Latanoprost and Ofloxacin.
Has Dr. Jason J. Jun received payments from drug or device companies?
CMS Open Payments shows $299 in general payments to Dr. Jun from 4 companies from 2018 to 2024. The largest total came from Alcon Laboratories Inc.
How long has Dr. Jason J. Jun been practicing?
Dr. Jun's NPI was assigned in 2008.
Does Dr. Jason J. Jun do research?
Dmand AI links 2 publications to Dr. Jun.
Who does Dr. Jason J. Jun publish with?
Dr. Jun's most frequent co-authors are Anthony J. Aldave, MD (1 shared paper), Florence Cabot, MD (1 shared paper) and David Y. Huang, MD (1 shared paper).
Selling to ophthalmology practices?
See ophthalmologists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card