Dr. Michael Y. Chan, MD
- Medicare patients, 2024
- 14
- Part D claims, 2024
- 943
- Publications
- 3
- Hospital affiliations
- 1
- Industry payments
- $16,062
- 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. Chan'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. Michael Y. Chan is an internist in Fontana, California
Dr. Chan practices at Kaiser Permanente - Fontana Medical Center in Fontana, California.
Dr. Chan's NPI, 1841442464, was assigned on October 14, 2008. Dr. Chan graduated from Keck School of Medicine of USC in 2006. Dr. Chan holds California license A102377.
- NPI
- 1841442464NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4082870027
- NPI enumeration date
- October 14, 2008
- 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
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Y. Chan practices at Kaiser Permanente - Fontana Medical Center in Fontana, California
Dr. Chan'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. Michael Y. Chan is affiliated with 3 sites of care and 1 medical group
Dr. Chan's primary practice is Kaiser Permanente - Fontana Medical Center in Fontana, California. Dr. Chan is also affiliated with Fontana Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Chan to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael Y. Chan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chan practices, 2 sites in all. 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 |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael Y. Chan is one of 16,751 internists in California
Internal medicine is Dr. Chan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chan is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Chan is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Chan
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. Michael Y. Chan treated 14 Medicare patients in 2024, average age 66
CMS counts 14 Medicare patients who saw Dr. Chan in 2024. Their average risk score is 1.63, 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. Chan's median patient age at 60, with 63% women.
Dr. Chan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women63%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael Y. Chan wrote 943 Medicare Part D claims in 2024
In 2024, Dr. Chan wrote 943 Medicare Part D claims for 369 patients. 81% of them were for generic drugs. CMS names the drug for 804 of them, across 21 drugs with 11 or more claims each, at $668,268 in total drug cost. In 2023, CMS named 705 claims across 21 drugs.
Dr. Chan's Part D claims by kind of drug, 2024
- Generic762 claims81%
- Brand-name and other181 claims19%
Dr. Chan'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. Chan's Part D claims, 2024
- Antibiotics9%82 of 943 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: 7052024: 80414%
Drugs named by CMS: 21 in 2024, 21 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
Dr. Michael Y. Chan ranks in the 54th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Chan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 27 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Chan, more than 54% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Chan ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 54th percentile27 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 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. Michael Y. Chan has 3 publications on record
Dmand AI links 3 papers to Dr. Chan in 2018. Dr. Chan's most frequent co-authors are Andrew John Boyle, MD, Jane Ellaine Tongson-Ignacio, MD and Charles Nathan Trujillo, MD.
Dr. Chan's most frequent co-authors
- Andrew John Boyle, MD1 shared paper
- Jane Ellaine Tongson-Ignacio, MD1 shared paper
- Charles Nathan Trujillo, MD1 shared paper
Recent publications by Dr. Chan
J Interv Cardiol
See who Dr. Chan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chan 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. Michael Y. Chan received $16,062 in industry payments from 2017 to 2024
CMS Open Payments shows 16 general payments to Dr. Chan from 4 drug and device companies from 2017 to 2024. Consulting fees make up the largest share, 51% of the total. Abbott Laboratories paid the most, $15,915.
General payments to Dr. Chan by program year, 2017 to 2024
General payments to Dr. Chan by kind, 2017 to 2024
- Consulting fees$8,25051%
- Compensation for serving as faculty or as a speaker for a medical education program$4,50028%
- Speaker and faculty fees$3,00019%
- Food and beverage$3122%
Companies that paid Dr. Chan the most, 2017 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael Y. Chan has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chan, most recently CMS Stage 1 EHR in 2012.
Awards and honors for Dr. Chan
- 2012
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Michael Y. Chan graduated from Keck School of Medicine of USC
Dr. Chan graduated from Keck School of Medicine of USC in 2006.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Michael Y. Chan accepts plans from 2 insurance carriers
Dr. Chan is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Chan accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael Y. Chan'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 DataDmand AI Org Hierarchy Data |
| 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) |
| 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) |
| 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. Michael Y. Chan
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. Michael Y. Chan's NPI number?
Dr. Michael Y. Chan's NPI number is 1841442464. It was assigned on October 14, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Y. Chan?
Dr. Michael Y. Chan is an internist in Fontana, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Michael Y. Chan practice?
Dr. Chan practices at 9965 Sierra Ave, Fontana, CA 92335. Dr. Chan's primary practice is Kaiser Permanente - Fontana Medical Center in Fontana, California. Dmand AI also links Dr. Chan to 1 group practice or clinic.
What is Dr. Michael Y. Chan's office phone number?
The practice phone on file for Dr. Chan is (909) 427-5000.
What is Dr. Michael Y. Chan's medical license number?
Dr. Chan holds California license A102377.
Which hospitals is Dr. Michael Y. Chan affiliated with?
Dr. Chan is affiliated with Fontana Medical Center.
What medical group is Dr. Michael Y. Chan part of?
Dr. Chan is linked to Southern California Permanente Medical Group.
Does Dr. Michael Y. Chan accept Medicare?
Yes. CMS lists Dr. Chan as accepting Medicare assignment.
How many Medicare patients does Dr. Michael Y. Chan see?
CMS counts 14 Medicare patients who saw Dr. Chan in 2024, with an average age of 66.
Is Dr. Michael Y. Chan board certified?
Yes. Dr. Chan is board certified in gastroenterology by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
Where did Dr. Michael Y. Chan go to medical school?
Dr. Chan graduated from Keck School of Medicine of USC in 2006.
What drugs does Dr. Michael Y. Chan prescribe most?
In 2024 Medicare Part D data, Dr. Chan's most prescribed drugs by claims were Gavilyte-C, Pantoprazole Sodium and Omeprazole.
Has Dr. Michael Y. Chan received payments from drug or device companies?
CMS Open Payments shows $16,062 in general payments to Dr. Chan from 4 companies from 2017 to 2024. The largest total came from Abbott Laboratories.
How long has Dr. Michael Y. Chan been practicing?
Dr. Chan graduated from medical school in 2006, 20 years ago.
Does Dr. Michael Y. Chan do research?
Dmand AI links 3 publications to Dr. Chan.
Who does Dr. Michael Y. Chan publish with?
Dr. Chan's most frequent co-authors are Andrew John Boyle, MD (1 shared paper), Jane Ellaine Tongson-Ignacio, MD (1 shared paper) and Charles Nathan Trujillo, MD (1 shared paper).
What insurance does Dr. Michael Y. Chan accept?
Dr. Chan is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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