Dr. Alexander Chen, DO
- Medicare services, 2020
- 195
- Part D claims, 2024
- 638
- Publications
- 2
- Hospital affiliations
- 2
- Industry payments
- $1,847
- Practice address
- 12401 Washington Blvd, Whittier, CA 90602
- Practice phone
- Call (562) 698-0811
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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. Alexander Chen is an internist in Whittier, California
Dr. Chen practices at PIH Health Whittier Hospital in Whittier, California, part of PIH Health.
Dr. Chen's NPI, 1114252608, was assigned on October 16, 2009. Dr. Chen graduated from Touro College of Osteopathic Medicine - New York in 2008. Dr. Chen holds California license 20A10965.
- NPI
- 1114252608NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941460679
- NPI enumeration date
- October 16, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (562) 698-0811
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alexander Chen practices at PIH Health Whittier Hospital in Whittier, California
Dr. Chen's primary practice is PIH Health Whittier Hospital, at 12401 Washington Blvd, Whittier, CA 90602 in Los Angeles County. The practice phone is (562) 698-0811.
- PIH Health Whittier Hospital12401 Washington Blvd, Whittier, CA 90602 · Los Angeles CountyPhone(562) 698-0811
Source: Dmand AI Affiliation Data
Dr. Alexander Chen is affiliated with 3 sites of care and 1 medical group
Dr. Chen's primary practice is PIH Health Whittier Hospital in Whittier, California, part of PIH Health. The medical group on file is CareMore Medical Group. Dmand AI also links Dr. Chen to 1 more hospital and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Alexander 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 |
|---|---|
| PIH Health Whittier Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alexander 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
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. Alexander Chen billed Medicare for 195 services in 2020
CMS data shows 195 Medicare services from Dr. Chen across 3 procedure codes in 2020, all of them office visits. Medicare paid $9,950 for them. Every service was in an office.
Dr. Chen's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 6492020: 19570%
- Imaging
- 2019: 192020: 0100%
- Tests and treatments
- 2019: 952020: 0100%
- Other services
- 2019: 1102020: 0100%
Dr. Chen compared with the California median for internists, 2020
- Dr. Chen
- California median
- Medicare services
- 195vs 36146% below
- Part D claims
- 250vs 42141% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Chen's most billed Medicare procedure codes, 2020
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. Alexander Chen's patients have a median age of 78
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 78, with 53% 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 78
Patient panel by sex, all payers
- Women53%
- Men46%
Source: Dmand AI Patient Panel Data
Dr. Alexander Chen wrote 638 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 638 Medicare Part D claims for 221 patients. 83% of them were for generic drugs. CMS names the drug for 250 of them, across 15 drugs with 11 or more claims each, at $14,403 in total drug cost. In 2023, CMS named 850 claims across 33 drugs.
Dr. Chen's Part D claims by kind of drug, 2024
- Generic529 claims83%
- Brand-name and other109 claims17%
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
- Opioids5%33 of 638 claims
- Antibiotics9%58 of 638 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: 8502024: 25071%
Drugs named by CMS: 15 in 2024, 33 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. Alexander 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. Alexander Chen has 2 publications on record
Dmand AI links 2 papers to Dr. Chen in 2024. 2024 was the busiest year, with 2. Dr. Chen's most frequent co-authors are Sally Liu Baxter, MD, Michael F. Chiang, MD and Justin F. Rousseau, MD.
Dr. Chen's most frequent co-authors
- Sally Liu Baxter, MD2 shared papers
- Michael F. Chiang, MD2 shared papers
- Justin F. Rousseau, MD2 shared papers
Recent publications by Dr. Chen
See who Dr. Chen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chen works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Alexander Chen received $1,847 in industry payments from 2017 to 2023
CMS Open Payments shows 94 general payments to Dr. Chen from 17 drug and device companies from 2017 to 2023. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $834.
General payments to Dr. Chen by program year, 2017 to 2023
Companies that paid Dr. Chen the most, 2017 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Alexander Chen graduated from Touro College of Osteopathic Medicine - New York
Dr. Chen graduated from Touro College of Osteopathic Medicine - New York in 2008.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Alexander Chen accepts plans from 5 insurance carriers
Dr. Chen is in network with 5 carriers, including Blue Cross Blue Shield of Massachusetts, HCSC and Regence Health Plans. PPO plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Blue Cross Blue Shield of Michigan
- Humana
Plan types Dr. Chen accepts, by number of carriers
- PPO4
- Medicare3
- HMO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Alexander 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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)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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (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. Alexander 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. Alexander Chen's NPI number?
Dr. Alexander Chen's NPI number is 1114252608. It was assigned on October 16, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Alexander Chen?
Dr. Alexander Chen is an internist in Whittier, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Alexander Chen practice?
Dr. Chen practices at 12401 Washington Blvd, Whittier, CA 90602. Dr. Chen's primary practice is PIH Health Whittier Hospital in Whittier, California, part of PIH Health. Dmand AI also links Dr. Chen to 1 hospital and 1 group practice or clinic.
What is Dr. Alexander Chen's office phone number?
The practice phone on file for Dr. Chen is (562) 698-0811.
What is Dr. Alexander Chen's medical license number?
Dr. Chen holds California license 20A10965.
Which hospitals is Dr. Alexander Chen affiliated with?
Dr. Chen practices at PIH Health Whittier Hospital in Whittier, California. Dmand AI links Dr. Chen to 1 more hospital.
What medical group is Dr. Alexander Chen part of?
Dr. Chen is linked to CareMore Medical Group.
Does Dr. Alexander Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 195 services in 2020, and Dr. Chen accepts Medicare assignment.
Is Dr. Alexander Chen board certified?
Yes. Dr. Chen is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Alexander Chen bill to Medicare?
In 2020, Dr. Chen's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and office visit, established patient (99215).
Show 7 more questionsShow fewer questions
Where did Dr. Alexander Chen go to medical school?
Dr. Chen graduated from Touro College of Osteopathic Medicine - New York in 2008.
What drugs does Dr. Alexander Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Amlodipine Besylate, Eliquis and Atorvastatin Calcium.
Has Dr. Alexander Chen received payments from drug or device companies?
CMS Open Payments shows $1,847 in general payments to Dr. Chen from 17 companies from 2017 to 2023. The largest total came from Amgen Inc.
How long has Dr. Alexander Chen been practicing?
Dr. Chen graduated from medical school in 2008, 18 years ago.
Does Dr. Alexander Chen do research?
Dmand AI links 2 publications to Dr. Chen.
Who does Dr. Alexander Chen publish with?
Dr. Chen's most frequent co-authors are Sally Liu Baxter, MD (2 shared papers), Michael F. Chiang, MD (2 shared papers) and Justin F. Rousseau, MD (2 shared papers).
What insurance does Dr. Alexander Chen accept?
Dr. Chen is in network with 5 carriers, including Blue Cross Blue Shield of Massachusetts, HCSC and Regence Health Plans. PPO plans come from the most carriers, 4. Check the plan with the practice before a visit.
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