Rossan Chen, M.D.
NPI 1619263415 · Family Medicine Physician · Vallejo, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rossan Chen, M.D. is a Family Medicine Physician provider in Vallejo, CA (NPI 1619263415).
Provider details
- NPI number
- 1619263415
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A121965 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 65 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 286 | 108 |
| Amlodipine Besylate | 195 | 76 |
| Losartan Potassium | 135 | 53 |
| Lisinopril | 110 | 43 |
| Levothyroxine Sodium | 100 | 29 |
| Lisinopril/Hydrochlorothiazidebrand: Lisinopril-Hydrochlorothiazide | 88 | 30 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-06-21
- Last updated
- 2023-04-27
- Certified
- 2023-04-27
Frequently asked questions
- What is Rossan Chen's NPI number?
- Rossan Chen's National Provider Identifier (NPI) is 1619263415, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rossan Chen's specialty?
- Rossan Chen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Rossan Chen located?
- Rossan Chen's practice location on file with NPPES is 975 Sereno Dr, Vallejo, CA 94589-2441.
- What is Rossan Chen's phone number?
- The practice phone number listed in the NPPES registry for Rossan Chen is (707) 651-1025.
- Does Rossan Chen accept Medicare?
- Rossan Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rossan Chen's NPI active?
- Yes — Rossan Chen's NPI (1619263415) is active in the NPPES registry as of the last update on 2023-04-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.