Dr. John L. Chen, DO
- Industry payments
- $1,760
- Medical group
- 1
- Insurance carriers
- 3
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 9965 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Permanente - Fontana Medical Center
Fontana, 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. John L. Chen is an anesthesiologist in Fontana, California
Dr. Chen practices at Kaiser Permanente - Fontana Medical Center in Fontana, California.
Dr. Chen's NPI, 1649356023, was assigned on October 28, 2006. Dr. Chen graduated from Touro University California - Vallejo in 2003. Dr. Chen holds California license 20A9401.
- NPI
- 1649356023NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4880751684
- NPI enumeration date
- October 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 427-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John L. Chen practices at Kaiser Permanente - Fontana Medical Center in Fontana, California
Dr. Chen's primary practice is Kaiser Permanente - Fontana Medical Center, at 9965 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-5000.
- Kaiser Permanente - Fontana Medical Center9965 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-5000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John L. Chen is affiliated with 1 site of care and 1 medical group
Dr. Chen's primary practice is Kaiser Permanente - Fontana Medical Center in Fontana, California. The medical group on file is Southern California Permanente Medical Group.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John L. 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 |
|---|---|
| Kaiser Permanente - Fontana Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John L. Chen is one of 6,593 anesthesiologists in California
Anesthesiology is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Chen is board certified in adult cardiac anesthesiology by the American Board of Anesthesiology. Dr. Chen is licensed in California.
Specialties and state licenses
- Anesthesiology, CaliforniaPrimary
Anesthesiologists near Dr. Chen
Counts of anesthesiologists 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. John L. Chen's patients have a median age of 65
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 65, with 51% 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 65
Patient panel by sex, all payers
- Women51%
- Men49%
Source: Dmand AI Patient Panel Data
How Dr. John L. 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)
Dr. John L. Chen received $1,760 in industry payments from 2018 to 2025
CMS Open Payments shows 14 general payments to Dr. Chen from 4 drug and device companies from 2018 to 2025. Travel and lodging make up the largest share, 63% of the total. Abbott Laboratories paid the most, $1,569.
General payments to Dr. Chen by program year, 2018 to 2025
General payments to Dr. Chen by kind, 2018 to 2025
- Travel and lodging$1,11263%
- Food and beverage$64837%
Companies that paid Dr. Chen the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John L. Chen graduated from Touro University California - Vallejo
Dr. Chen graduated from Touro University California - Vallejo in 2003. Dr. Chen is a member of AOA and ASA.
- Medical school
- Board certified in adult cardiac anesthesiology
- Board certified in anesthesiology
- Board certified in 2005 - 2026
Source: Dmand AI Professional Profile Data
Dr. John L. Chen accepts plans from 3 insurance carriers
Dr. Chen is in network with 3 carriers, including Kaiser Permanente, CMS Medicare and Molina. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
- Molina
Plan types Dr. Chen accepts, by number of carriers
- Medicare2
- EPO1
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. John L. 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 |
| 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 Dr. John L. 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. John L. Chen's NPI number?
Dr. John L. Chen's NPI number is 1649356023. It was assigned on October 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John L. Chen?
Dr. John L. Chen is an anesthesiologist in Fontana, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. John L. Chen practice?
Dr. Chen practices at 9965 Sierra Ave, Fontana, CA 92335. Dr. Chen's primary practice is Kaiser Permanente - Fontana Medical Center in Fontana, California.
What is Dr. John L. Chen's office phone number?
The practice phone on file for Dr. Chen is (909) 427-5000.
What is Dr. John L. Chen's medical license number?
Dr. Chen holds California license 20A9401.
What medical group is Dr. John L. Chen part of?
Dr. Chen is linked to Southern California Permanente Medical Group.
Does Dr. John L. Chen accept Medicare?
Yes. CMS lists Dr. Chen as accepting Medicare assignment.
Is Dr. John L. Chen board certified?
Yes. Dr. Chen is board certified in adult cardiac anesthesiology by the American Board of Anesthesiology.
Where did Dr. John L. Chen go to medical school?
Dr. Chen graduated from Touro University California - Vallejo in 2003.
Has Dr. John L. Chen received payments from drug or device companies?
CMS Open Payments shows $1,760 in general payments to Dr. Chen from 4 companies from 2018 to 2025. The largest total came from Abbott Laboratories.
How long has Dr. John L. Chen been practicing?
Dr. Chen graduated from medical school in 2003, 23 years ago.
What insurance does Dr. John L. Chen accept?
Dr. Chen is in network with 3 carriers, including Kaiser Permanente, CMS Medicare and Molina. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
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