Dr. Andrew T. Chan, MD
- Medicare services, 2024
- 160
- Medicare patients, 2024
- 131
- Part D claims, 2024
- 96
- Hospital affiliations
- 4
- Industry payments
- $9,537
- Practice address
- 55 Fruit Street, Boston, MA 02114
- Practice phone
- Call (617) 726-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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. Andrew T. Chan is a gastroenterologist in Boston, Massachusetts
Dr. Chan practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Chan's NPI, 1982600144, was assigned on June 22, 2005. Dr. Chan graduated from Harvard Medical School in 1997. Dr. Chan holds Massachusetts license 210410.
- NPI
- 1982600144NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4688643547
- NPI enumeration date
- June 22, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (617) 726-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Andrew T. Chan practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Chan's primary practice is Massachusetts General Hospital, at 55 Fruit Street, Boston, MA 02114 in Suffolk County. The practice phone is (617) 726-2000.
- Massachusetts General Hospital55 Fruit Street, Boston, MA 02114 · Suffolk CountyPhone(617) 726-2000
Source: Dmand AI Affiliation Data
Dr. Andrew T. Chan is affiliated with 5 sites of care and 4 medical groups
Dr. Chan's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Chan is also affiliated with Salem Hospital. The medical group on file is Massachusetts General Hospital. Dmand AI also links Dr. Chan to 2 more hospitals, 3 medical groups and 1 community health center, each named with a free account. Dr. Chan's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Andrew T. Chan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chan practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Massachusetts General Hospital | Available with a free account |
| +4 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Mass General Brigham and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Andrew T. Chan is one of 597 gastroenterologists in Massachusetts
Gastroenterology is Dr. Chan's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Chan is licensed in Massachusetts.
Specialties and state licenses
- Gastroenterology, MassachusettsPrimary
Gastroenterologists near Dr. Chan
Counts of gastroenterologists 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. Andrew T. Chan billed Medicare for 160 services in 2024
CMS data shows 160 Medicare services from Dr. Chan across 5 procedure codes in 2024, for 131 Medicare patients. Medicare paid $15,363 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chan's Medicare services by type, 2024
- Other services90
- Surgery55
- Office and hospital visits15
Dr. Chan compared with the Massachusetts median for gastroenterologists, 2024
- Dr. Chan
- Massachusetts median
- Medicare services
- 160vs 51969% below
- Medicare patients
- 131vs 34362% below
- Part D claims
- 71vs 30076% below
Medians across 583 gastroenterologists in Massachusetts 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. Andrew T. Chan treated 131 Medicare patients in 2024, average age 73
CMS counts 131 Medicare patients who saw Dr. Chan in 2024. The largest group is 65 to 74, with 60 patients. 66% of them have high blood pressure, and 66% have high cholesterol. 8% are also on Medicaid. Their average risk score is 1.43, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chan's median patient age at 69, 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
- Women5441%
- Men7759%
Chronic conditions among Dr. Chan's Medicare patients, 2024
- High blood pressure66%
- High cholesterol66%
- Arthritis39%
- Ischemic heart disease34%
- Anxiety31%
- Cancer29%
- Atrial fibrillation28%
- Chronic kidney disease27%
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 69
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Andrew T. Chan wrote 96 Medicare Part D claims in 2024
In 2024, Dr. Chan wrote 96 Medicare Part D claims for 85 patients. 90% of them were for generic drugs. CMS names the drug for 71 of them, across 1 drug with 11 or more claims each, at $1,012 in total drug cost.
Dr. Chan's Part D claims by kind of drug, 2024
- Generic86 claims90%
- Brand-name and other10 claims10%
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.
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. Andrew T. Chan ranks in the 50th percentile for colonoscopy in Medicare
Dr. Chan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chan as offering telehealth. CMS counts 24 procedures of colonoscopy by Dr. Chan, more than 50% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Chan ranks in Medicare procedure volume
- Colonoscopy
- 50th percentile24 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 48th percentile17 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Andrew T. Chan received $9,537 in industry payments in 2025
CMS Open Payments shows 5 general payments to Dr. Chan from 2 drug and device companies in 2025. Consulting fees make up the largest share, 100% of the total. Pfizer Inc. paid the most, $8,800.
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
Dr. Andrew T. Chan graduated from Harvard Medical School
Dr. Chan graduated from Harvard Medical School in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Andrew T. 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)Doctors and Clinicians Utilization Data (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 |
| 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. Andrew T. 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. Andrew T. Chan's NPI number?
Dr. Andrew T. Chan's NPI number is 1982600144. It was assigned on June 22, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Andrew T. Chan?
Dr. Andrew T. Chan is a gastroenterologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Andrew T. Chan practice?
Dr. Chan practices at 55 Fruit Street, Boston, MA 02114. Dr. Chan's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Chan to 2 hospitals, 3 medical groups and 1 community health center.
What is Dr. Andrew T. Chan's office phone number?
The practice phone on file for Dr. Chan is (617) 726-2000.
What is Dr. Andrew T. Chan's medical license number?
Dr. Chan holds Massachusetts license 210410.
Which hospitals is Dr. Andrew T. Chan affiliated with?
Dr. Chan practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Chan is also affiliated with Salem Hospital. Dmand AI links Dr. Chan to 2 more hospitals.
What medical group is Dr. Andrew T. Chan part of?
Dr. Chan is linked to Massachusetts General Hospital. Dmand AI links Dr. Chan to 3 more medical groups.
Does Dr. Andrew T. Chan accept Medicare?
Yes. CMS data shows Dr. Chan billed Medicare for 160 services in 2024, and Dr. Chan accepts Medicare assignment.
Does Dr. Andrew T. Chan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chan as offering telehealth services.
How many Medicare patients does Dr. Andrew T. Chan see?
CMS counts 131 Medicare patients who saw Dr. Chan in 2024, with an average age of 73.
Show 5 more questionsShow fewer questions
What services does Dr. Andrew T. Chan bill to Medicare?
In 2024, Dr. Chan's most billed Medicare services were medicare service (G0500), surgery: digestive system (45385) and medicare service (G0105).
Where did Dr. Andrew T. Chan go to medical school?
Dr. Chan graduated from Harvard Medical School in 1997.
What drugs does Dr. Andrew T. Chan prescribe most?
In 2024 Medicare Part D data, Dr. Chan's most prescribed drugs by claims were Gavilyte-G.
Has Dr. Andrew T. Chan received payments from drug or device companies?
CMS Open Payments shows $9,537 in general payments to Dr. Chan from 2 companies from 2025 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Andrew T. Chan been practicing?
Dr. Chan graduated from medical school in 1997, 29 years ago.
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