Dr. Chienwei Timothy Chen, MD
- Medicare services, 2024
- 1,168
- Medicare patients, 2024
- 209
- Part D claims, 2024
- 5,361
- Hospital affiliations
- 2
- Industry payments
- $3,570
- Practice address
- 4050 Barranca Pkwy, Irvine, CA 92604
- Practice phone
- Call (877) 696-3622
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Memorialcare Medical Foundation
Irvine, 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. Chienwei Timothy Chen is an internist in Irvine, California
Dr. Chen practices at Memorialcare Medical Foundation in Irvine, California.
Dr. Chen's NPI, 1992795256, was assigned on October 26, 2005. Dr. Chen graduated from Boston University School Of Medicine in 1998. Dr. Chen holds California license A79035.
- NPI
- 1992795256NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8527033307
- NPI enumeration date
- October 26, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (877) 696-3622
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Chienwei Timothy Chen practices at Memorialcare Medical Foundation in Irvine, California
Dr. Chen's primary practice is Memorialcare Medical Foundation, at 4050 Barranca Pkwy, Irvine, CA 92604 in Orange County. The practice phone is (877) 696-3622.
- Memorialcare Medical Foundation4050 Barranca Pkwy, Irvine, CA 92604 · Orange CountyPhone(877) 696-3622
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Chienwei Timothy Chen is affiliated with 5 sites of care and 1 medical group
Dr. Chen's primary practice is Memorialcare Medical Foundation in Irvine, California. Dr. Chen is also affiliated with Hoag Hospital Newport Beach. The medical group on file is MemorialCare Medical Group. Dmand AI also links Dr. Chen to 1 more hospital, 1 group practice or clinic and 1 home health agency, 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. Chienwei Timothy Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Memorialcare Medical Foundation | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Chienwei Timothy 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 is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute mini-stroke (TIA), acute sinusitis, acute skin infection, adjustment disease, aneurysm, anxiety 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. Chienwei Timothy Chen billed Medicare for 1,168 services in 2024
CMS data shows 1,168 Medicare services from Dr. Chen across 12 procedure codes in 2024, for 209 Medicare patients. Medicare paid $42,231 for them. Every service was in an office.
Dr. Chen's Medicare services by type, 2024
- Office and hospital visits538
- Other services323
- Surgery265
- Tests and treatments42
Dr. Chen compared with the California median for internists, 2024
- Dr. Chen
- California median
- Medicare services
- 1,168vs 3613.2 times
- Medicare patients
- 209vs 15138% above
- Part D claims
- 4,609vs 42110.9 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. Chienwei Timothy Chen treated 209 Medicare patients in 2024, average age 75
CMS counts 209 Medicare patients who saw Dr. Chen in 2024. The largest group is 65 to 74, with 97 patients. 75% of them have high cholesterol, and 59% have high blood pressure. 13% are also on Medicaid. Their average risk score is 0.96, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 64, with 44% 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
- Women9947%
- Men11053%
Chronic conditions among Dr. Chen's Medicare patients, 2024
- High cholesterol75%
- High blood pressure59%
- Arthritis39%
- Chronic kidney disease27%
- Diabetes23%
- Ischemic heart disease16%
- Anxiety15%
- Osteoporosis15%
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 64
Patient panel by sex, all payers
- Women44%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Chienwei Timothy Chen wrote 5,361 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 5,361 Medicare Part D claims for 514 patients. 86% of them were for generic drugs. CMS names the drug for 4,609 of them, across 94 drugs with 11 or more claims each, at $527,946 in total drug cost.
Dr. Chen's Part D claims by kind of drug, 2024
- Generic4,598 claims86%
- Brand-name721 claims13%
- Other42 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%90 of 5,361 claims
- Antibiotics2%108 of 5,361 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Chienwei Timothy 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
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Chienwei Timothy Chen received $3,570 in industry payments from 2024 to 2025
CMS Open Payments shows 131 general payments to Dr. Chen from 15 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $755.
General payments to Dr. Chen by program year, 2024 to 2025
Companies that paid Dr. Chen the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Chienwei Timothy 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. Chienwei Timothy Chen graduated from Boston University School Of Medicine
Dr. Chen graduated from Boston University School Of Medicine in 1998. Dr. Chen is a member of ACP.
- Medical school
- Board certified in internal medicine
- Board certified in obesity medicine
Source: Dmand AI Professional Profile Data
Dr. Chienwei Timothy 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, 10. 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
- Humana
- Regence Health Plans
- +6 more carriersWith a free account
Plan types Dr. Chen accepts, by number of carriers
- PPO10
- Medicare8
- HMO6
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Chienwei Timothy 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)Doctors and Clinicians Utilization Data (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. Chienwei Timothy 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. Chienwei Timothy Chen's NPI number?
Dr. Chienwei Timothy Chen's NPI number is 1992795256. It was assigned on October 26, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Chienwei Timothy Chen?
Dr. Chienwei Timothy Chen is an internist in Irvine, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Chienwei Timothy Chen practice?
Dr. Chen practices at 4050 Barranca Pkwy, Irvine, CA 92604. Dr. Chen's primary practice is Memorialcare Medical Foundation in Irvine, California. Dmand AI also links Dr. Chen to 1 hospital, 1 group practice or clinic and 1 home health agency.
What is Dr. Chienwei Timothy Chen's office phone number?
The practice phone on file for Dr. Chen is (877) 696-3622.
What is Dr. Chienwei Timothy Chen's medical license number?
Dr. Chen holds California license A79035.
Which hospitals is Dr. Chienwei Timothy Chen affiliated with?
Dr. Chen is affiliated with Hoag Hospital Newport Beach. Dmand AI links Dr. Chen to 1 more hospital.
What medical group is Dr. Chienwei Timothy Chen part of?
Dr. Chen is linked to MemorialCare Medical Group.
Does Dr. Chienwei Timothy Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 1,168 services in 2024, and Dr. Chen accepts Medicare assignment.
Does Dr. Chienwei Timothy Chen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chen as offering telehealth services.
How many Medicare patients does Dr. Chienwei Timothy Chen see?
CMS counts 209 Medicare patients who saw Dr. Chen in 2024, with an average age of 75.
Show 7 more questionsShow fewer questions
Is Dr. Chienwei Timothy Chen board certified?
Yes. Dr. Chen is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Chienwei Timothy Chen bill to Medicare?
In 2024, Dr. Chen's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and medicare service (G2211).
Where did Dr. Chienwei Timothy Chen go to medical school?
Dr. Chen graduated from Boston University School Of Medicine in 1998.
What drugs does Dr. Chienwei Timothy Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Losartan Potassium.
Has Dr. Chienwei Timothy Chen received payments from drug or device companies?
CMS Open Payments shows $3,570 in general payments to Dr. Chen from 15 companies from 2024 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Chienwei Timothy Chen been practicing?
Dr. Chen graduated from medical school in 1998, 28 years ago.
What insurance does Dr. Chienwei Timothy 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, 10. Check the plan with the practice before a visit.
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