Education, Medical, GraduateFamily PracticeFinancing, Government
Dr. Rossan M. Chen, MD
NPI1619263415PAC ID4880825454
- Medicare patients, 2024
- 15
- Part D claims, 2024
- 3,314
- Publications
- 2
- Hospital affiliations
- 1
- Medical group
- 1
- 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. Chen'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. Rossan M. Chen is a family medicine physician in Vallejo, California
Dr. Chen practices at Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente.
Dr. Chen's NPI, 1619263415, was assigned on June 21, 2011. Dr. Chen graduated from UCSF School of Medicine in 2011. Dr. Chen holds California license A121965.
NPI and contact details
- NPI
- 1619263415NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4880825454
- NPI enumeration date
- June 21, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (707) 651-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Rossan M. Chen practices at Vallejo Medical Center in Vallejo, California
Dr. Chen'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. Rossan M. Chen is affiliated with 3 sites of care and 1 medical group
Dr. Chen'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. Chen to 1 more home health agency and 1 hospice, each named with a free account.
The Permanente Medical Group, Inc.1 home health agencyName with a free account1 hospiceName with a free account
See all 4 affiliations for Dr. ChenSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Rossan M. Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen 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. Rossan M. Chen is one of 15,680 family medicine physicians in California
Family medicine is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Chen is board certified in family medicine by the American Board of Family Medicine. Dr. Chen is licensed in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists epilepsy and irritable bowel syndrome (IBS) among the conditions Dr. Chen treats.
Family medicine physicians near Dr. Chen
Counts of family medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
15,680family medicine physicians in California164family medicine physicians in Vallejo138family medicine physicians at Vallejo Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Rossan M. Chen treated 15 Medicare patients in 2024, average age 64
CMS counts 15 Medicare patients who saw Dr. Chen in 2024. 73% of them have high blood pressure. Their average risk score is 1.17, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 47, with 61% women.
Medicare patients, 202415
Average age64
Average risk score1.17
Chronic conditions among Dr. Chen's Medicare patients, 2024
- High blood pressure73%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 47
Patient panel by sex, all payers
- Women61%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Rossan M. Chen wrote 3,314 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 3,314 Medicare Part D claims for 463 patients. 88% of them were for generic drugs. CMS names the drug for 2,760 of them, across 65 drugs with 11 or more claims each, at $125,714 in total drug cost. In 2023, CMS named 3,012 claims across 68 drugs.
Part D claims, 20243,314
Drugs named by CMS65
Total drug cost$125,714
Part D patients463
Dr. Chen's Part D claims by kind of drug, 2024
- Generic2,919 claims88%
- Brand-name360 claims11%
- Other35 claims1%
Dr. Chen'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. Chen's Part D claims, 2024
- Opioids2%74 of 3,314 claims
- Antibiotics2%64 of 3,314 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: 3,0122024: 2,7608%
Drugs named by CMS: 65 in 2024, 68 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. Rossan M. Chen offers telehealth to Medicare patients
Dr. Chen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chen as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Rossan M. Chen has 2 publications on record
Dmand AI links 2 papers to Dr. Chen. The most frequent topics are Education, Medical, Graduate, Family Practice and Financing, Government. Dr. Chen has published most often in Acad Med. Dr. Chen's most frequent co-author is Kevin Lawrence Grumbach, MD.
Papers2
Topics Dr. Chen writes about most
- Education, Medical, Graduate
- Family Practice
- Financing, Government
- Internal Medicine
- Internship and Residency
- Pediatrics
- Physicians, Primary Care
- Training Support
Dr. Chen's most frequent co-authors
Recent publications by Dr. Chen
Education, Medical, GraduateFamily PracticeFinancing, Government
See who Dr. Chen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chen works with, so you can find a warm path to the right family medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Rossan M. Chen graduated from UCSF School of Medicine
Dr. Chen graduated from UCSF School of Medicine in 2011.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Rossan M. Chen accepts plans from 2 insurance carriers
Dr. Chen 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. Chen accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Rossan M. Chen'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 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 |
| 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. Rossan M. Chen
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. Rossan M. Chen's NPI number?
Dr. Rossan M. Chen's NPI number is 1619263415. It was assigned on June 21, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Rossan M. Chen?
Dr. Rossan M. Chen is a family medicine physician in Vallejo, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Rossan M. Chen practice?
Dr. Chen practices at 975 Sereno Dr, Vallejo, CA 94589. Dr. Chen's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. Dmand AI also links Dr. Chen to 1 home health agency and 1 hospice.
What is Dr. Rossan M. Chen's office phone number?
The practice phone on file for Dr. Chen is (707) 651-1000.
What is Dr. Rossan M. Chen's medical license number?
Dr. Chen holds California license A121965.
Which hospitals is Dr. Rossan M. Chen affiliated with?
Dr. Chen practices at Vallejo Medical Center in Vallejo, California.
What medical group is Dr. Rossan M. Chen part of?
Dr. Chen is linked to The Permanente Medical Group, Inc.
Does Dr. Rossan M. Chen accept Medicare?
Yes. CMS lists Dr. Chen as accepting Medicare assignment.
Does Dr. Rossan M. Chen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chen as offering telehealth services.
How many Medicare patients does Dr. Rossan M. Chen see?
CMS counts 15 Medicare patients who saw Dr. Chen in 2024, with an average age of 64.
Show 7 more questionsShow fewer questions
Is Dr. Rossan M. Chen board certified?
Yes. Dr. Chen is board certified in family medicine by the American Board of Family Medicine.
Where did Dr. Rossan M. Chen go to medical school?
Dr. Chen graduated from UCSF School of Medicine in 2011.
What drugs does Dr. Rossan M. Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
How long has Dr. Rossan M. Chen been practicing?
Dr. Chen graduated from medical school in 2011, 15 years ago.
Does Dr. Rossan M. Chen do research?
Dmand AI links 2 publications to Dr. Chen.
Who does Dr. Rossan M. Chen publish with?
Dr. Chen's most frequent co-authors are Kevin Lawrence Grumbach, MD (2 shared papers).
What insurance does Dr. Rossan M. Chen accept?
Dr. Chen 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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