Dr. James Francis Chan, MD
- Medicare services, 2024
- 36
- Medicare patients, 2024
- 28
- Part D claims, 2024
- 1,230
- Hospital affiliations
- 1
- Industry payments
- $144
- Practice address
- 4501 Sand Creek Road, Antioch, CA 94531
- Practice phone
- Call (925) 813-6500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. James Francis Chan is a hospitalist in Antioch, California
Dr. Chan practices at Antioch Medical Center in Antioch, California, part of Kaiser Permanente.
Dr. Chan's NPI, 1033437231, was assigned on May 12, 2010. Dr. Chan holds California license A126160.
- NPI
- 1033437231NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335389980
- NPI enumeration date
- May 12, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (925) 813-6500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- 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. James Francis Chan practices at Antioch Medical Center in Antioch, California
Dr. Chan's primary practice is Antioch Medical Center, at 4501 Sand Creek Road, Antioch, CA 94531 in Contra Costa County. The practice phone is (925) 813-6500.
- Antioch Medical Center4501 Sand Creek Road, Antioch, CA 94531 · Contra Costa CountyPhone(925) 813-6500
Source: Dmand AI Affiliation Data
Dr. James Francis Chan is affiliated with 1 site of care and 1 medical group
Dr. Chan's primary practice is Antioch Medical Center in Antioch, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James Francis Chan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Antioch Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James Francis Chan is one of 3,186 hospitalists in California
Hospitalist is Dr. Chan's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Chan is licensed in California.
Specialties and state licenses
- Hospitalist, CaliforniaPrimary
Hospitalists near Dr. Chan
Counts of hospitalists 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. James Francis Chan billed Medicare for 36 services in 2024
CMS data shows 36 Medicare services from Dr. Chan across 2 procedure codes in 2024, for 28 Medicare patients. Medicare paid $2,555 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 292024: 3624%
Dr. Chan compared with the California median for hospitalists, 2024
- Dr. Chan
- California median
- Medicare services
- 36vs 43092% below
- Medicare patients
- 28vs 20186% below
- Part D claims
- 765vs 6911.1 times
Medians across 2,991 hospitalists in California with Dmand AI profiles that report each measure.
Dr. Chan'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. James Francis Chan treated 28 Medicare patients in 2024, average age 71
CMS counts 28 Medicare patients who saw Dr. Chan in 2024. The largest group is 65 to 74, with 13 patients. 75% of them have high blood pressure, and 61% have high cholesterol. 57% are also on Medicaid. Their average risk score is 2.32, 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 71, with 54% women.
Dr. Chan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chan's Medicare patients by sex, 2024
- Women1554%
- Men1346%
Chronic conditions among Dr. Chan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol61%
- Chronic kidney disease54%
Share of Medicare patients with each condition. A patient can have several.
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 71
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James Francis Chan wrote 1,230 Medicare Part D claims in 2024
In 2024, Dr. Chan wrote 1,230 Medicare Part D claims for 237 patients. 84% of them were for generic drugs. CMS names the drug for 765 of them, across 32 drugs with 11 or more claims each, at $54,942 in total drug cost. In 2023, CMS named 804 claims across 34 drugs.
Dr. Chan's Part D claims by kind of drug, 2024
- Generic1,036 claims84%
- Brand-name166 claims13%
- Other28 claims2%
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
- Opioids3%31 of 1,230 claims
- Antibiotics6%70 of 1,230 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: 8042024: 7655%
Drugs named by CMS: 32 in 2024, 34 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. James Francis Chan takes part in Medicare
Dr. Chan 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. James Francis Chan received $144 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Chan from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. DePuy Synthes Sales Inc. paid the most, $144.
Companies that paid Dr. Chan the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. James Francis 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 | 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. James Francis 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. James Francis Chan's NPI number?
Dr. James Francis Chan's NPI number is 1033437231. It was assigned on May 12, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. James Francis Chan?
Dr. James Francis Chan is a hospitalist in Antioch, California. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. James Francis Chan practice?
Dr. Chan practices at 4501 Sand Creek Road, Antioch, CA 94531. Dr. Chan's primary practice is Antioch Medical Center in Antioch, California, part of Kaiser Permanente.
What is Dr. James Francis Chan's office phone number?
The practice phone on file for Dr. Chan is (925) 813-6500.
What is Dr. James Francis Chan's medical license number?
Dr. Chan holds California license A126160.
Which hospitals is Dr. James Francis Chan affiliated with?
Dr. Chan practices at Antioch Medical Center in Antioch, California.
What medical group is Dr. James Francis Chan part of?
Dr. Chan is linked to The Permanente Medical Group, Inc.
Does Dr. James Francis Chan accept Medicare?
Yes. CMS data shows Dr. Chan billed Medicare for 36 services in 2024, and Dr. Chan accepts Medicare assignment.
How many Medicare patients does Dr. James Francis Chan see?
CMS counts 28 Medicare patients who saw Dr. Chan in 2024, with an average age of 71.
What services does Dr. James Francis Chan bill to Medicare?
In 2024, Dr. Chan's most billed Medicare services were hospital inpatient care (99232) and hospital inpatient care (99238).
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What drugs does Dr. James Francis Chan prescribe most?
In 2024 Medicare Part D data, Dr. Chan's most prescribed drugs by claims were Pantoprazole Sodium, Atorvastatin Calcium and Amlodipine Besylate.
Has Dr. James Francis Chan received payments from drug or device companies?
CMS Open Payments shows $144 in general payments to Dr. Chan from 1 company from 2025 to 2025. The largest total came from DePuy Synthes Sales Inc.
How long has Dr. James Francis Chan been practicing?
Dr. Chan graduated from medical school in 2008, 18 years ago.
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