Dr. Gilbert Chen, MD
- Medicare services, 2024
- 361
- Medicare patients, 2024
- 337
- Part D claims, 2024
- 17
- Hospital affiliations
- 5
- Medical groups
- 3
- Practice address
- 400 North Pepper Avenue, Colton, CA 92324
- Practice phone
- Call (909) 580-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Gilbert Chen is an internist in Colton, California
Dr. Chen practices at Arrowhead Regional Medical Center in Colton, California, part of San Bernardino County.
Dr. Chen's NPI, 1013479120, was assigned on April 5, 2019. Dr. Chen graduated from St. George's University School of Medicine in 2019. Dr. Chen holds California license PTL390.
- NPI
- 1013479120NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587049481
- NPI enumeration date
- April 5, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 580-1000
- 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 Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gilbert Chen practices at Arrowhead Regional Medical Center in Colton, California
Dr. Chen's primary practice is Arrowhead Regional Medical Center, at 400 North Pepper Avenue, Colton, CA 92324 in San Bernardino County. The practice phone is (909) 580-1000.
- Arrowhead Regional Medical Center400 North Pepper Avenue, Colton, CA 92324 · San Bernardino CountyPhone(909) 580-1000
Source: Dmand AI Affiliation Data
Dr. Gilbert Chen is affiliated with 6 sites of care and 3 medical groups
Dr. Chen's primary practice is Arrowhead Regional Medical Center in Colton, California, part of San Bernardino County. Dr. Chen is also affiliated with Redlands Community Hospital. The medical group on file is Inpatient Specialist of California PC. Dmand AI also links Dr. Chen to 3 more hospitals, 2 medical groups and 1 hospice, 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. Gilbert Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Arrowhead Regional Medical Center | Available with a free account |
| +5 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gilbert 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. Gilbert Chen billed Medicare for 361 services in 2024
CMS data shows 361 Medicare services from Dr. Chen across 3 procedure codes in 2024, for 337 Medicare patients. Medicare paid $48,012 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1562024: 361131%
Dr. Chen compared with the California median for internists, 2024
- Dr. Chen
- California median
- Medicare services
- 361vs 361Close to median
- Medicare patients
- 337vs 1512.2 times
- Part D claims
- 54vs 42187% below
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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gilbert Chen treated 337 Medicare patients in 2024, average age 70
CMS counts 337 Medicare patients who saw Dr. Chen in 2024. The largest group is 65 to 74, with 133 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 80% are also on Medicaid. Their average risk score is 3.33, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 59, with 46% women.
Dr. Chen's Medicare patients by age, 2024
Dr. Chen's Medicare patients by sex, 2024
- Women16449%
- Men17351%
Chronic conditions among Dr. Chen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol74%
- Diabetes65%
- Chronic kidney disease51%
- Arthritis50%
- Heart failure49%
- Mood disorders44%
- Anxiety36%
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 59
Patient panel by sex, all payers
- Women46%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gilbert Chen wrote 17 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 17 Medicare Part D claims for 13 patients. 82% of them were for generic drugs. They cover 3 drugs, with $11,345 in total drug cost.
Dr. Chen's Part D claims by kind of drug, 2024
- Generic14 claims82%
- Brand-name and other3 claims18%
Dr. Chen's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
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. Gilbert 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. Gilbert Chen graduated from St. George's University School of Medicine
Dr. Chen graduated from St. George's University School of Medicine in 2019.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Gilbert Chen accepts plans from 7 insurance carriers
Dr. Chen is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- Regence Health Plans
- CMS Medicare
Plan types Dr. Chen accepts, by number of carriers
- Medicare7
- PPO5
- HMO3
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Gilbert 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 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) |
| 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. Gilbert 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. Gilbert Chen's NPI number?
Dr. Gilbert Chen's NPI number is 1013479120. It was assigned on April 5, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Gilbert Chen?
Dr. Gilbert Chen is an internist in Colton, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gilbert Chen practice?
Dr. Chen practices at 400 North Pepper Avenue, Colton, CA 92324. Dr. Chen's primary practice is Arrowhead Regional Medical Center in Colton, California, part of San Bernardino County. Dmand AI also links Dr. Chen to 3 hospitals, 2 medical groups and 1 hospice.
What is Dr. Gilbert Chen's office phone number?
The practice phone on file for Dr. Chen is (909) 580-1000.
What is Dr. Gilbert Chen's medical license number?
Dr. Chen holds California license PTL390.
Which hospitals is Dr. Gilbert Chen affiliated with?
Dr. Chen practices at Arrowhead Regional Medical Center in Colton, California. Dr. Chen is also affiliated with Redlands Community Hospital. Dmand AI links Dr. Chen to 3 more hospitals.
What medical group is Dr. Gilbert Chen part of?
Dr. Chen is linked to Inpatient Specialist of California PC. Dmand AI links Dr. Chen to 2 more medical groups.
Does Dr. Gilbert Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 361 services in 2024, and Dr. Chen accepts Medicare assignment.
How many Medicare patients does Dr. Gilbert Chen see?
CMS counts 337 Medicare patients who saw Dr. Chen in 2024, with an average age of 70.
Is Dr. Gilbert Chen board certified?
Yes. Dr. Chen is board certified in internal medicine by the American Board of Internal Medicine.
Show 5 more questionsShow fewer questions
What services does Dr. Gilbert Chen bill to Medicare?
In 2024, Dr. Chen's most billed Medicare services were hospital inpatient care (99223), hospital inpatient care (99222) and critical care (99291).
Where did Dr. Gilbert Chen go to medical school?
Dr. Chen graduated from St. George's University School of Medicine in 2019.
What drugs does Dr. Gilbert Chen prescribe most?
In 2022 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Atorvastatin Calcium, Metformin HCl and Ozempic.
How long has Dr. Gilbert Chen been practicing?
Dr. Chen graduated from medical school in 2019, 7 years ago.
What insurance does Dr. Gilbert Chen accept?
Dr. Chen is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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