Andrew Steven Chen
- Part D claims, 2024
- 517
- Hospital affiliations
- 1
- Industry payments
- $114
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 1880 N Orange Grove Ave, Pomona, CA 91767
- Practice phone
- Call (909) 823-5220
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Andrew S. Chen, M.D., Inc.
Pomona, California
Find Andrew 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.
Andrew Steven Chen is an internist in Pomona, California
Andrew Chen practices at Andrew S. Chen, M.D., Inc. in Pomona, California.
Andrew Chen's NPI, 1053873646, was assigned on April 2, 2019. Andrew Chen graduated from Ohio State College of Medicine in 2019. Andrew Chen holds California license A182957.
- NPI
- 1053873646NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3678800281
- NPI enumeration date
- April 2, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 823-5220
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Andrew Steven Chen practices at Andrew S. Chen, M.D., Inc. in Pomona, California
Andrew Chen's primary practice is Andrew S. Chen, M.D., Inc., at 1880 N Orange Grove Ave, Pomona, CA 91767 in Los Angeles County. The practice phone is (909) 823-5220.
- Andrew S. Chen, M.D., Inc.1880 N Orange Grove Ave, Pomona, CA 91767 · Los Angeles CountyPhone(909) 823-5220
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Andrew Steven Chen is affiliated with 3 sites of care and 1 medical group
Andrew Chen's primary practice is Andrew S. Chen, M.D., Inc. in Pomona, California. Andrew Chen is also affiliated with San Antonio Regional Hospital. The medical group on file is Southridge Medical Center. Dmand AI also links Andrew 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 Andrew Steven Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Andrew Chen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Andrew S. Chen, M.D., Inc. | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Andrew Steven Chen is one of 16,751 internists in California
Internal medicine is Andrew Chen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Andrew Chen is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Andrew Chen's licenses on file in 2 states: California and Nevada.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Nevada license
Internists near Andrew 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
Andrew Steven Chen's patients have a median age of 59
Across all payers, Dmand AI patient panel data puts Andrew Chen's median patient age at 59, with 42% women.
Andrew 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 59
Patient panel by sex, all payers
- Women42%
- Men57%
Source: Dmand AI Patient Panel Data
Andrew Steven Chen wrote 517 Medicare Part D claims in 2024
In 2024, Andrew Chen wrote 517 Medicare Part D claims for 99 patients. 91% of them were for generic drugs. CMS names the drug for 312 of them, across 17 drugs with 11 or more claims each, at $1,891 in total drug cost. In 2023, CMS named 40 claims across 3 drugs.
Andrew Chen's Part D claims by kind of drug, 2024
- Generic471 claims91%
- Brand-name and other46 claims9%
Andrew 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 Andrew Chen's Part D claims, 2024
- Antibiotics6%33 of 517 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: 402024: 312680%
Drugs named by CMS: 17 in 2024, 3 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 Andrew Steven Chen takes part in Medicare
Andrew 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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Andrew Steven Chen received $114 in industry payments from 2019 to 2024
CMS Open Payments shows 5 general payments to Andrew Chen from 4 drug and device companies from 2019 to 2024. Food and beverage make up the largest share, 100% of the total. Haemonetics Corporation paid the most, $45.
General payments to Andrew Chen by program year, 2019 to 2024
Companies that paid Andrew Chen the most, 2019 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Andrew Steven Chen graduated from Ohio State College of Medicine
Andrew Chen graduated from Ohio State College of Medicine in 2019.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Andrew Steven Chen accepts plans from 2 insurance carriers
Andrew Chen is in network with 2 carriers, including Aetna and United Healthcare. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
Plan types Andrew Chen accepts, by number of carriers
- Medicare2
- PPO2
- EPO1
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Andrew Steven 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 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) |
| 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 Andrew Steven 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 Andrew Steven Chen's NPI number?
Andrew Steven Chen's NPI number is 1053873646. It was assigned on April 2, 2019, and it is active in the NPI Registry.
What does Andrew Steven Chen specialize in?
Andrew Steven Chen is an internist in Pomona, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Andrew Steven Chen practice?
Andrew Chen practices at 1880 N Orange Grove Ave, Pomona, CA 91767. Andrew Chen's primary practice is Andrew S. Chen, M.D., Inc. in Pomona, California. Dmand AI also links Andrew Chen to 1 group practice or clinic.
What is Andrew Steven Chen's office phone number?
The practice phone on file for Andrew Chen is (909) 823-5220.
What is Andrew Steven Chen's medical license number?
Andrew Chen holds California license A182957, one of the licenses on file in 2 states.
Which states has Andrew Steven Chen been licensed in?
Dmand AI has state licenses on file for Andrew Chen in California (2022 to 2026) and Nevada (2019 to 2022).
Which hospitals is Andrew Steven Chen affiliated with?
Andrew Chen is affiliated with San Antonio Regional Hospital.
What medical group is Andrew Steven Chen part of?
Andrew Chen is linked to Southridge Medical Center.
Does Andrew Steven Chen accept Medicare?
Yes. CMS lists Andrew Chen as accepting Medicare assignment.
Is Andrew Steven Chen board certified?
Yes. Andrew Chen is board certified in internal medicine by the American Board of Internal Medicine.
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Where did Andrew Steven Chen go to medical school?
Andrew Chen graduated from Ohio State College of Medicine in 2019.
What drugs does Andrew Steven Chen prescribe most?
In 2024 Medicare Part D data, Andrew Chen's most prescribed drugs by claims were Atorvastatin Calcium, Diclofenac Sodium and Cyclobenzaprine HCl.
Has Andrew Steven Chen received payments from drug or device companies?
CMS Open Payments shows $114 in general payments to Andrew Chen from 4 companies from 2019 to 2024. The largest total came from Haemonetics Corporation.
How long has Andrew Steven Chen been practicing?
Andrew Chen graduated from medical school in 2019, 7 years ago.
What insurance does Andrew Steven Chen accept?
Andrew Chen is in network with 2 carriers, including Aetna and United Healthcare. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
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