Dr. Iun-Iu A. Chen, DO
- Part D claims, 2024
- 1,561
- Hospital affiliations
- 2
- Medical group
- 1
- Insurance carriers
- 13
- State licenses
- 2
- Practice address
- 1179 N McDowell Blvd, Petaluma, CA 94954
- Practice phone
- Call (707) 559-7500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Rohnert Park Health Center
Petaluma, 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. Iun-Iu A. Chen is a family medicine physician in Petaluma, California
Dr. Chen practices at Rohnert Park Health Center in Petaluma, California.
Dr. Chen's NPI, 1114288412, was assigned on June 4, 2012. Dr. Chen graduated from Rowan-Virtua School of Osteopathic Medicine - Stratford in 2012. Dr. Chen's Massachusetts license number on file is 252070.
- NPI
- 1114288412NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6709018872
- NPI enumeration date
- June 4, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 559-7500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Iun-Iu A. Chen practices at Rohnert Park Health Center in Petaluma, California
Dr. Chen's primary practice is Rohnert Park Health Center, at 1179 N McDowell Blvd, Petaluma, CA 94954 in Sonoma County. The practice phone is (707) 559-7500.
- Rohnert Park Health Center1179 N McDowell Blvd, Petaluma, CA 94954 · Sonoma CountyPhone(707) 559-7500
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Iun-Iu A. Chen is affiliated with 4 sites of care and 1 medical group
Dr. Chen's primary practice is Rohnert Park Health Center in Petaluma, California. Dr. Chen is also affiliated with Petaluma Valley Hospital. The medical group on file is Petaluma Health Center. Dmand AI also links Dr. Chen to 1 more hospital and 1 community health center, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Iun-Iu A. 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 |
|---|---|
| Rohnert Park Health Center | Available with a free account |
| +3 more affiliated sites | 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 each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Iun-Iu A. 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. Dmand AI has Dr. Chen's licenses on file in 2 states: Massachusetts and California.
Specialties and state licenses
- Family medicine, MassachusettsPrimary
- California license
Clinical focus
Dmand AI lists adjustment disease, alcohol use disorders, anxiety, atrial fibrillation and flutter, chronic diabetes, chronic hypertension, chronic inflammatory bowel disease (IBD) and chronic obstructive pulmonary disease (COPD) 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.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Iun-Iu A. Chen's patients have a median age of 48
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 48, with 78% women.
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 48
Patient panel by sex, all payers
- Women78%
- Men22%
Source: Dmand AI Patient Panel Data
Dr. Iun-Iu A. Chen wrote 1,561 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 1,561 Medicare Part D claims for 177 patients. 88% of them were for generic drugs. CMS names the drug for 1,062 of them, across 40 drugs with 11 or more claims each, at $28,678 in total drug cost. In 2023, CMS named 1,054 claims across 41 drugs.
Dr. Chen's Part D claims by kind of drug, 2024
- Generic1,366 claims88%
- Brand-name178 claims11%
- Other17 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%41 of 1,561 claims
- Antibiotics1%15 of 1,561 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: 1,0542024: 1,0621%
Drugs named by CMS: 40 in 2024, 41 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
How Dr. Iun-Iu A. Chen takes part in Medicare
Dr. Chen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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. Iun-Iu A. Chen graduated from Rowan-Virtua School of Osteopathic Medicine - Stratford
Dr. Chen graduated from Rowan-Virtua School of Osteopathic Medicine - Stratford in 2012.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Iun-Iu A. Chen accepts plans from 13 insurance carriers
Dr. Chen is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Elevance
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +5 more carriersWith a free account
Plan types Dr. Chen accepts, by number of carriers
- PPO8
- Medicare7
- HMO6
- EPO4
- POS4
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Iun-Iu 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 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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. Iun-Iu 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. Iun-Iu A. Chen's NPI number?
Dr. Iun-Iu A. Chen's NPI number is 1114288412. It was assigned on June 4, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Iun-Iu A. Chen?
Dr. Iun-Iu A. Chen is a family medicine physician in Petaluma, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Iun-Iu A. Chen practice?
Dr. Chen practices at 1179 N McDowell Blvd, Petaluma, CA 94954. Dr. Chen's primary practice is Rohnert Park Health Center in Petaluma, California. Dmand AI also links Dr. Chen to 1 hospital and 1 community health center.
What is Dr. Iun-Iu A. Chen's office phone number?
The practice phone on file for Dr. Chen is (707) 559-7500.
What is Dr. Iun-Iu A. Chen's medical license number?
Dr. Chen's Massachusetts license number on file is 252070, one of the licenses on file in 2 states.
Which states has Dr. Iun-Iu A. Chen been licensed in?
Dmand AI has state licenses on file for Dr. Chen in Massachusetts (2012 to 2015) and California (2015 to 2025).
Which hospitals is Dr. Iun-Iu A. Chen affiliated with?
Dr. Chen is affiliated with Petaluma Valley Hospital. Dmand AI links Dr. Chen to 1 more hospital.
What medical group is Dr. Iun-Iu A. Chen part of?
Dr. Chen is linked to Petaluma Health Center.
Does Dr. Iun-Iu A. Chen accept Medicare?
Yes. CMS lists Dr. Chen as accepting Medicare assignment.
Is Dr. Iun-Iu A. Chen board certified?
Yes. Dr. Chen is board certified in family medicine by the American Board of Family Medicine.
Show 4 more questionsShow fewer questions
Where did Dr. Iun-Iu A. Chen go to medical school?
Dr. Chen graduated from Rowan-Virtua School of Osteopathic Medicine - Stratford in 2012.
What drugs does Dr. Iun-Iu A. Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Levothyroxine Sodium, Atorvastatin Calcium and Lisinopril.
How long has Dr. Iun-Iu A. Chen been practicing?
Dr. Chen graduated from medical school in 2012, 14 years ago.
What insurance does Dr. Iun-Iu A. Chen accept?
Dr. Chen is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
Selling to family medicine practices?
See family medicine physicians 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