Dr. Chongjia Claire Chen, MD
- Medicare services, 2021
- 84
- Part D claims, 2021
- 662
- Industry payments
- $999
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 26726 Crown Valley Pkwy, Mission Viejo, CA 92691
- Practice phone
- Call (949) 364-4361
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Head and Neck Associates of Orange County an Incorprate
Mission Viejo, 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. Chongjia Claire Chen is an internist in Mission Viejo, California
Dr. Chen practices at Head and Neck Associates of Orange County an Incorprate in Mission Viejo, California.
Dr. Chen's NPI, 1285021618, was assigned on April 23, 2015. Dr. Chen graduated from University of Alabama School of Medicine in 2015. Dr. Chen holds Massachusetts license 274855.
- NPI
- 1285021618NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3577870070
- NPI enumeration date
- April 23, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (949) 364-4361
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Chongjia Claire Chen practices at Head and Neck Associates of Orange County an Incorprate in Mission Viejo, California
Dr. Chen's primary practice is Head and Neck Associates of Orange County an Incorprate, at 26726 Crown Valley Pkwy, Mission Viejo, CA 92691 in Orange County. The practice phone is (949) 364-4361.
- Head and Neck Associates of Orange County an Incorprate26726 Crown Valley Pkwy, Mission Viejo, CA 92691 · Orange CountyPhone(949) 364-4361
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Chongjia Claire Chen is affiliated with 2 sites of care and 1 medical group
Dr. Chen's primary practice is Head and Neck Associates of Orange County an Incorprate in Mission Viejo, California. The medical group on file is Head & Neck Associates of Orange County. Dmand AI also links Dr. Chen to 1 more group practice or clinic, 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. Chongjia Claire Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Head and Neck Associates of Orange County an Incorprate | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Chongjia Claire 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 licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
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. Chongjia Claire Chen billed Medicare for 84 services in 2021
CMS data shows 84 Medicare services from Dr. Chen across 3 procedure codes in 2021. Medicare paid $5,687 for them.
Dr. Chen's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 1202021: 8430%
Where Dr. Chen's Medicare services took place, 2021
- In an office1417%
- In a facility7083%
Dr. Chen compared with the California median for internists, 2021
- Dr. Chen
- California median
- Medicare services
- 84vs 36177% below
- Part D claims
- 662vs 42157% above
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Chen's most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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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. Chongjia Claire Chen's patients have a median age of 40
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 40, with 47% 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 40
Patient panel by sex, all payers
- Women47%
- Men52%
Source: Dmand AI Patient Panel Data
Dr. Chongjia Claire Chen wrote 662 Medicare Part D claims in 2021
In 2021, Dr. Chen wrote 662 Medicare Part D claims. They cover 24 drugs, with $19,736 in total drug cost. In 2020, CMS named 1,016 claims across 33 drugs.
Dr. Chen's most prescribed drugs by claims, 2021
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, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 1,0162021: 66235%
Drugs named by CMS: 24 in 2021, 33 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Chongjia Claire 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)
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Dr. Chongjia Claire Chen received $999 in industry payments from 2023 to 2025
CMS Open Payments shows 24 general payments to Dr. Chen from 8 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Sanofi and Genzyme US Companies paid the most, $287.
General payments to Dr. Chen by program year, 2023 to 2025
Companies that paid Dr. Chen the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Chongjia Claire Chen graduated from University of Alabama School of Medicine
Dr. Chen graduated from University of Alabama School of Medicine in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Chongjia Claire 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Chongjia Claire 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. Chongjia Claire Chen's NPI number?
Dr. Chongjia Claire Chen's NPI number is 1285021618. It was assigned on April 23, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Chongjia Claire Chen?
Dr. Chongjia Claire Chen is an internist in Mission Viejo, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Chongjia Claire Chen practice?
Dr. Chen practices at 26726 Crown Valley Pkwy, Mission Viejo, CA 92691. Dr. Chen's primary practice is Head and Neck Associates of Orange County an Incorprate in Mission Viejo, California. Dmand AI also links Dr. Chen to 1 group practice or clinic.
What is Dr. Chongjia Claire Chen's office phone number?
The practice phone on file for Dr. Chen is (949) 364-4361.
What is Dr. Chongjia Claire Chen's medical license number?
Dr. Chen holds Massachusetts license 274855.
What medical group is Dr. Chongjia Claire Chen part of?
Dr. Chen is linked to Head & Neck Associates of Orange County.
Does Dr. Chongjia Claire Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 84 services in 2021, and Dr. Chen accepts Medicare assignment.
What services does Dr. Chongjia Claire Chen bill to Medicare?
In 2021, Dr. Chen's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and care management and other visits (99443).
Where did Dr. Chongjia Claire Chen go to medical school?
Dr. Chen graduated from University of Alabama School of Medicine in 2015.
What drugs does Dr. Chongjia Claire Chen prescribe most?
In 2021 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Lisinopril.
Has Dr. Chongjia Claire Chen received payments from drug or device companies?
CMS Open Payments shows $999 in general payments to Dr. Chen from 8 companies from 2023 to 2025. The largest total came from Sanofi and Genzyme US Companies.
How long has Dr. Chongjia Claire Chen been practicing?
Dr. Chen graduated from medical school in 2015, 11 years ago.
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