Dr. Jian A. Chen, MD
- Medicare services, 2024
- 1,450
- Medicare patients, 2024
- 243
- Part D claims, 2024
- 7,541
- MIPS score, 2024
- 100
- Hospital affiliations
- 3
- Practice address
- 3901 Las Posas Rd, Camarillo, CA 93010
- Practice phone
- Call (805) 384-8071
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Dignity Health Medical Group - Ventura County, a Service of Dignity He
Camarillo, California
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. Jian A. Chen is an internist in Camarillo, California
Dr. Chen practices at Dignity Health Medical Group - Ventura County, a Service of Dignity He in Camarillo, California.
Dr. Chen's NPI, 1679568612, was assigned on September 15, 2005. Dr. Chen graduated from Keck School of Medicine of USC in 1992. Dr. Chen's California license number on file is G77775.
- NPI
- 1679568612NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3173666880
- NPI enumeration date
- September 15, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (805) 384-8071
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jian A. Chen practices at Dignity Health Medical Group - Ventura County, a Service of Dignity He in Camarillo, California
Dr. Chen's primary practice is Dignity Health Medical Group - Ventura County, a Service of Dignity He, at 3901 Las Posas Rd, Camarillo, CA 93010 in Ventura County. The practice phone is (805) 384-8071.
- Dignity Health Medical Group - Ventura County, a Service of Dignity He3901 Las Posas Rd, Camarillo, CA 93010 · Ventura CountyPhone(805) 384-8071
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Jian A. Chen is affiliated with 10 sites of care and 1 medical group
Dr. Chen's primary practice is Dignity Health Medical Group - Ventura County, a Service of Dignity He in Camarillo, California. Dr. Chen is also affiliated with Community Memorial Hospital - Ventura. The medical group on file is Mercy Medical Group. Dmand AI also links Dr. Chen to 2 more hospitals, 4 home health agencies, 1 group practice or clinic and 1 skilled nursing facility, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Jian A. Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health Medical Group - Ventura County, a Service of Dignity He | Available with a free account |
| +9 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jian A. Chen is one of 16,751 internists in California
Internal medicine is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chen is board certified in internal medicine by the American Board of Internal Medicine. Dr. Chen has a license on file in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute skin infection, alzheimer's disease, anxiety, arteritis, arthritis, asthma and atrial fibrillation and flutter among the conditions Dr. Chen treats.
Internists near Dr. Chen
Counts of internists 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. Jian A. Chen billed Medicare for 1,450 services in 2024
CMS data shows 1,450 Medicare services from Dr. Chen across 12 procedure codes in 2024, for 243 Medicare patients. Medicare paid $106,023 for them. Every service was in an office.
Dr. Chen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6842024: 6972%
- Other services
- 2023: 2902024: 624115%
- Tests and treatments
- 2023: 962024: 8017%
- Lab and pathology
- 2023: 312024: 4958%
- Surgery
- 2023: 142024: 0100%
Dr. Chen compared with the California median for internists, 2024
- Dr. Chen
- California median
- Medicare services
- 1,450vs 3614.0 times
- Medicare patients
- 243vs 15161% above
- Part D claims
- 6,863vs 42116.3 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Chen'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. Chen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chen and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jian A. Chen treated 243 Medicare patients in 2024, average age 76
CMS counts 243 Medicare patients who saw Dr. Chen in 2024. The largest group is 75 to 84, with 97 patients. 75% of them have high cholesterol, and 67% have high blood pressure. 18% are also on Medicaid. Their average risk score is 1.03, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 72, with 74% women.
Dr. Chen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chen's Medicare patients by sex, 2024
- Women18576%
- Men5824%
Chronic conditions among Dr. Chen's Medicare patients, 2024
- High cholesterol75%
- High blood pressure67%
- Arthritis36%
- Osteoporosis29%
- Diabetes28%
- Chronic kidney disease23%
- Mood disorders18%
- Depression17%
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 72
Patient panel by sex, all payers
- Women74%
- Men26%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jian A. Chen wrote 7,541 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 7,541 Medicare Part D claims for 451 patients. 86% of them were for generic drugs. CMS names the drug for 6,863 of them, across 143 drugs with 11 or more claims each, at $647,638 in total drug cost. In 2023, CMS named 7,020 claims across 139 drugs.
Dr. Chen's Part D claims by kind of drug, 2024
- Generic6,470 claims86%
- Brand-name1,023 claims14%
- Other48 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
- Opioids3%240 of 7,541 claims
- Antibiotics2%141 of 7,541 claims
- Antipsychotics, patients 65 and over0%32 of 7,541 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: 7,0202024: 6,8632%
Drugs named by CMS: 143 in 2024, 139 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. Jian A. Chen scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Chen for performance year 2024, reported through an alternative payment model (APM). 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
Dr. Chen's MIPS scores, performance year 2024
- 100of 100Final score
- 86.3of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Jian A. Chen received $4,943 in industry payments from 2016 to 2025
CMS Open Payments shows 209 general payments to Dr. Chen from 35 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $710.
General payments to Dr. Chen by program year, 2016 to 2025
Companies that paid Dr. Chen the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jian A. Chen has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chen, most recently CMS Stage 1 EHR in 2012.
Awards and honors for Dr. Chen
- 2012
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Jian A. Chen graduated from Keck School of Medicine of USC
Dr. Chen graduated from Keck School of Medicine of USC in 1992. Dr. Chen is a member of ACP.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Jian A. Chen accepts plans from 14 insurance carriers
Dr. Chen is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. Chen accepts, by number of carriers
- PPO9
- HMO7
- Medicare7
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Jian A. 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| 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)Clinician Public Reporting: Overall MIPS Performance (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. Jian A. 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. Jian A. Chen's NPI number?
Dr. Jian A. Chen's NPI number is 1679568612. It was assigned on September 15, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Jian A. Chen?
Dr. Jian A. Chen is an internist in Camarillo, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Jian A. Chen practice?
Dr. Chen practices at 3901 Las Posas Rd, Camarillo, CA 93010. Dr. Chen's primary practice is Dignity Health Medical Group - Ventura County, a Service of Dignity He in Camarillo, California. Dmand AI also links Dr. Chen to 2 hospitals, 4 home health agencies, 1 group practice or clinic and 1 skilled nursing facility.
What is Dr. Jian A. Chen's office phone number?
The practice phone on file for Dr. Chen is (805) 384-8071.
What is Dr. Jian A. Chen's medical license number?
Dr. Chen's California license number on file is G77775.
Which hospitals is Dr. Jian A. Chen affiliated with?
Dr. Chen is affiliated with Community Memorial Hospital - Ventura. Dmand AI links Dr. Chen to 2 more hospitals.
What medical group is Dr. Jian A. Chen part of?
Dr. Chen is linked to Mercy Medical Group.
Does Dr. Jian A. Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 1,450 services in 2024, and Dr. Chen accepts Medicare assignment.
Does Dr. Jian A. Chen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chen as offering telehealth services.
What is Dr. Jian A. Chen's MIPS score?
Dr. Chen's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. Jian A. Chen see?
CMS counts 243 Medicare patients who saw Dr. Chen in 2024, with an average age of 76.
Is Dr. Jian A. Chen board certified?
Yes. Dr. Chen is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Jian A. Chen bill to Medicare?
In 2024, Dr. Chen's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and medicare service (G0439).
Where did Dr. Jian A. Chen go to medical school?
Dr. Chen graduated from Keck School of Medicine of USC in 1992.
What drugs does Dr. Jian A. Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Amlodipine Besylate.
Has Dr. Jian A. Chen received payments from drug or device companies?
CMS Open Payments shows $4,943 in general payments to Dr. Chen from 35 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Jian A. Chen been practicing?
Dr. Chen graduated from medical school in 1992, 34 years ago.
What insurance does Dr. Jian A. Chen accept?
Dr. Chen is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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