Absorptiometry, PhotonAnalysis of VarianceBody Composition
Dr. Gary Lee Chan, MD
NPI1699702324
- Medicare services, 2022
- 230
- Part D claims, 2023
- 661
- Publications
- 7
- Industry payments
- $6,871
- Affiliated sites
- 1
- Practice address
- 300 Pasteur Dr, Stanford, CA 94305
- Practice phone
- Call (650) 723-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Stanford Hospital
Stanford, 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. Gary Lee Chan is an internist in Stanford, California
Dr. Chan practices at Stanford Hospital in Stanford, California.
Dr. Chan's NPI, 1699702324, was assigned on June 27, 2006. Dr. Chan graduated from Tufts University School Of Medicine in 1976. Dr. Chan holds California license G34576.
NPI and contact details
- NPI
- 1699702324NPI Registry (opens in a new tab)
- NPI enumeration date
- June 27, 2006
- NPI status
- Active
- Practice phone
- (650) 723-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 76
- Medical school graduation
- 1976
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Gary Lee Chan practices at Stanford Hospital in Stanford, California
Dr. Chan's primary practice is Stanford Hospital, at 300 Pasteur Dr, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.
- Stanford Hospital300 Pasteur Dr, Stanford, CA 94305 · Santa Clara CountyPhone(650) 723-4000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gary Lee Chan is affiliated with 2 sites of care and 1 medical group
Dr. Chan's primary practice is Stanford Hospital in Stanford, California. Dmand AI also links Dr. Chan to 1 group practice or clinic and 1 medical group, each named with a free account.
Stanford HospitalPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gary Lee 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 |
|---|---|
| Stanford Hospital | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Chan practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Gary Lee 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 internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Chan's licenses on file in 2 states: California and Utah.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Utah license
Clinical focus
Dmand AI lists bronchitis, deep vein thrombosis (DVT), diabetic emergency and vision problems among the conditions Dr. Chan treats.
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. Gary Lee Chan billed Medicare for 230 services in 2022
CMS data shows 230 Medicare services from Dr. Chan across 5 procedure codes in 2022. Medicare paid $21,599 for them. Every service was in an office.
Medicare services, 2022230
Paid by Medicare$21,599
Procedure codes5
Dr. Chan's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 1682022: 1661%
- Other services
- 2021: 392022: 39No change
- Lab and pathology
- 2021: 122022: 25108%
Dr. Chan compared with the California median for internists, 2022
- Dr. Chan
- California median
- Medicare services
- 230vs 36136% below
- Part D claims
- 661vs 42157% above
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Chan's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Chan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chan and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gary Lee Chan's patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Dr. Chan's median patient age at 73, with 36% 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 73
Patient panel by sex, all payers
- Women36%
- Men54%
Source: Dmand AI Patient Panel Data
Dr. Gary Lee Chan wrote 661 Medicare Part D claims in 2023
In 2023, Dr. Chan wrote 661 Medicare Part D claims. They cover 27 drugs, with $119,526 in total drug cost. In 2022, CMS named 2,501 claims across 69 drugs.
Part D claims, 2023661
Drugs named by CMS27
Total drug cost$119,526
Dr. Chan's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 2,5012023: 66174%
Drugs named by CMS: 27 in 2023, 69 in 2022.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
For MedTech and pharma teams
Find internists like Dr. Chan by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Gary Lee Chan has 7 publications on record
Dmand AI links 7 papers to Dr. Chan, published from 2006 to 2009. The most frequent topics are Nutritional Requirements, Absorptiometry, Photon and Body Composition. Dr. Chan has published most often in Nutrition. Dr. Chan's most frequent co-authors are Gyula Acsadi, MD, Thomas Owen Crawford, MD and Charles Brewster Scott, MD.
Papers7
Years published2006 to 2009
Dr. Chan's papers by year, 2006 to 2009
Topics Dr. Chan writes about most
- Nutritional Requirements
- Absorptiometry, Photon
- Body Composition
- Bone Density
- Burns
- Calcium
- Calcium, Dietary
- Food, Fortified
Dr. Chan's most frequent co-authors
- Gyula Acsadi, MD1 shared paper
- Thomas Owen Crawford, MD1 shared paper
- Charles Brewster Scott, MD1 shared paper
Recent publications by Dr. Chan
BurnsDietary CarbohydratesDietary Fats
Biological AvailabilityCalcification, PhysiologicCalcitonin
J Pediatr Gastroenterol Nutr
Energy IntakeEnteral NutritionGlycine max
Obstet Gynecol
Adolescent Nutritional Physiological PhenomenaBeveragesBirth Weight
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. Gary Lee Chan received $6,871 in industry payments from 2016 to 2024
CMS Open Payments shows 361 general payments to Dr. Chan from 34 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $984.
General payments to Dr. Chan by program year, 2016 to 2024
General payments to Dr. Chan by kind, 2016 to 2024
$6.9Kin total
- Food and beverage$6,863100%
- Education$80%
Companies that paid Dr. Chan the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gary Lee Chan has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Chan, most recently Super Doc in 2012.
Awards and honors for Dr. Chan
- 2012
- Super Doc
- Undated
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Gary Lee Chan graduated from Tufts University School Of Medicine
Dr. Chan graduated from Tufts University School Of Medicine in 1976.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Gary Lee Chan accepts plans from 5 insurance carriers
Dr. Chan is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, Elevance and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Elevance
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
Plan types Dr. Chan accepts, by number of carriers
- Medicare5
- PPO5
- HMO2
- EPO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Gary Lee 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 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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. Gary Lee 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. Gary Lee Chan's NPI number?
Dr. Gary Lee Chan's NPI number is 1699702324. It was assigned on June 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary Lee Chan?
Dr. Gary Lee Chan is an internist in Stanford, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gary Lee Chan practice?
Dr. Chan practices at 300 Pasteur Dr, Stanford, CA 94305. Dr. Chan's primary practice is Stanford Hospital in Stanford, California. Dmand AI also links Dr. Chan to 1 group practice or clinic and 1 medical group.
What is Dr. Gary Lee Chan's office phone number?
The practice phone on file for Dr. Chan is (650) 723-4000.
What is Dr. Gary Lee Chan's medical license number?
Dr. Chan holds California license G34576, one of the licenses on file in 2 states.
Which states has Dr. Gary Lee Chan been licensed in?
Dmand AI has state licenses on file for Dr. Chan in California (1977 to 2026) and Utah (1977 to 2016).
Does Dr. Gary Lee Chan accept Medicare?
Yes. CMS data shows Dr. Chan billed Medicare for 230 services in 2022.
Is Dr. Gary Lee Chan board certified?
Yes. Dr. Chan is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Gary Lee Chan bill to Medicare?
In 2022, Dr. Chan's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G0439).
Where did Dr. Gary Lee Chan go to medical school?
Dr. Chan graduated from Tufts University School Of Medicine in 1976.
Show 6 more questionsShow fewer questions
What drugs does Dr. Gary Lee Chan prescribe most?
In 2023 Medicare Part D data, Dr. Chan's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
Has Dr. Gary Lee Chan received payments from drug or device companies?
CMS Open Payments shows $6,871 in general payments to Dr. Chan from 34 companies from 2016 to 2024. The largest total came from Amgen Inc.
How long has Dr. Gary Lee Chan been practicing?
Dr. Chan graduated from medical school in 1976, 50 years ago.
Does Dr. Gary Lee Chan do research?
Dmand AI links 7 publications to Dr. Chan, published from 2006 to 2009.
Who does Dr. Gary Lee Chan publish with?
Dr. Chan's most frequent co-authors are Gyula Acsadi, MD (1 shared paper), Thomas Owen Crawford, MD (1 shared paper) and Charles Brewster Scott, MD (1 shared paper).
What insurance does Dr. Gary Lee Chan accept?
Dr. Chan is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, Elevance and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
Selling to internal medicine practices?
See internists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card