Dr. Gary Chun-I An, MD
- Medicare services, 2024
- 240
- Medicare patients, 2024
- 179
- Hospital affiliations
- 1
- Industry payments
- $67
- Medical group
- 1
- Practice address
- 111 Colchester Ave, Burlington, VT 05401
- Practice phone
- Call (802) 847-0000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. An'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 Chun-I An is a surgical critical care physician in Burlington, Vermont
Dr. An practices at University of Vermont Medical Center in Burlington, Vermont, part of University of Vermont Health Network.
Dr. An's NPI, 1093829830, was assigned on August 18, 2006. Dr. An graduated from University of Miami Leonard M. Miller School of Medicine in 1988. Dr. An holds Vermont license 042.0014189.
- NPI
- 1093829830NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7810994142
- NPI enumeration date
- August 18, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (802) 847-0000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gary Chun-I An practices at University of Vermont Medical Center in Burlington, Vermont
Dr. An's primary practice is University of Vermont Medical Center, at 111 Colchester Ave, Burlington, VT 05401 in Chittenden County. The practice phone is (802) 847-0000.
- University of Vermont Medical Center111 Colchester Ave, Burlington, VT 05401 · Chittenden CountyPhone(802) 847-0000
Source: Dmand AI Affiliation Data
Dr. Gary Chun-I An is affiliated with 2 sites of care and 1 medical group
Dr. An's primary practice is University of Vermont Medical Center in Burlington, Vermont, part of University of Vermont Health Network. The medical group on file is University of Vermont Medical Center. Dmand AI also links Dr. An to 1 more dialysis center, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gary Chun-I An's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. An practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University of Vermont Medical Center | Available with a free account |
| +1 more affiliated site | 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 University of Vermont Health Network and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Gary Chun-I An is one of 2 surgical critical care physicians in Vermont
Surgical critical care is Dr. An's primary specialty in the NPI Registry, under taxonomy code 2086S0102X. Dmand AI has Dr. An's licenses on file in 2 states: Vermont and Illinois.
Specialties and state licenses
- Surgical critical care, VermontPrimary
- Trauma surgery, Illinois
Surgical critical care physicians near Dr. An
Counts of surgical critical care physicians 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 Chun-I An billed Medicare for 240 services in 2024
CMS data shows 240 Medicare services from Dr. An across 4 procedure codes in 2024, for 179 Medicare patients. Medicare paid $13,404 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. An's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2662024: 24010%
Dr. An'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. An and other surgical critical care physicians in Vermont.
Source: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data
Dr. Gary Chun-I An treated 179 Medicare patients in 2024, average age 73
CMS counts 179 Medicare patients who saw Dr. An in 2024. The largest group is 65 to 74, with 74 patients. 75% of them have high blood pressure, and 69% have high cholesterol. 30% are also on Medicaid. Their average risk score is 1.68, 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. An's median patient age at 66, with 43% women.
Dr. An's Medicare patients by age, 2024
Dr. An's Medicare patients by sex, 2024
- Women8648%
- Men9352%
Chronic conditions among Dr. An's Medicare patients, 2024
- High blood pressure75%
- High cholesterol69%
- Arthritis54%
- Mood disorders49%
- Anxiety45%
- Depression43%
- Ischemic heart disease36%
- Diabetes34%
Share of Medicare patients with each condition. A patient can have several.
Dr. An's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women43%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Gary Chun-I An takes part in Medicare
Dr. An 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. Gary Chun-I An received $67 in industry payments from 2022 to 2024
CMS Open Payments shows 2 general payments to Dr. An from 2 drug and device companies from 2022 to 2024. Food and beverage make up the largest share, 70% of the total. La Jolla Pharmaceutical Company paid the most, $47.
General payments to Dr. An by program year, 2022 to 2024
General payments to Dr. An by kind, 2022 to 2024
- Food and beverage$4770%
- Education$2030%
Companies that paid Dr. An the most, 2022 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gary Chun-I An graduated from University of Miami Leonard M. Miller School of Medicine
Dr. An graduated from University of Miami Leonard M. Miller School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gary Chun-I An'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) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - 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) |
| 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. Gary Chun-I An
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 Chun-I An's NPI number?
Dr. Gary Chun-I An's NPI number is 1093829830. It was assigned on August 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary Chun-I An?
Dr. Gary Chun-I An is a surgical critical care physician in Burlington, Vermont. The primary specialty in the NPI Registry is Surgical Critical Care Physician (taxonomy code 2086S0102X).
Where does Dr. Gary Chun-I An practice?
Dr. An practices at 111 Colchester Ave, Burlington, VT 05401. Dr. An's primary practice is University of Vermont Medical Center in Burlington, Vermont, part of University of Vermont Health Network. Dmand AI also links Dr. An to 1 dialysis center.
What is Dr. Gary Chun-I An's office phone number?
The practice phone on file for Dr. An is (802) 847-0000.
What is Dr. Gary Chun-I An's medical license number?
Dr. An holds Vermont license 042.0014189, one of the licenses on file in 2 states.
Which states has Dr. Gary Chun-I An been licensed in?
Dmand AI has state licenses on file for Dr. An in Vermont and Illinois.
Which hospitals is Dr. Gary Chun-I An affiliated with?
Dr. An practices at University of Vermont Medical Center in Burlington, Vermont.
What medical group is Dr. Gary Chun-I An part of?
Dr. An is linked to University of Vermont Medical Center.
Does Dr. Gary Chun-I An accept Medicare?
Yes. CMS data shows Dr. An billed Medicare for 240 services in 2024, and Dr. An accepts Medicare assignment.
How many Medicare patients does Dr. Gary Chun-I An see?
CMS counts 179 Medicare patients who saw Dr. An in 2024, with an average age of 73.
Show 4 more questionsShow fewer questions
What services does Dr. Gary Chun-I An bill to Medicare?
In 2024, Dr. An's most billed Medicare services were hospital inpatient care (99231), hospital inpatient care (99222) and emergency department visit (99284).
Where did Dr. Gary Chun-I An go to medical school?
Dr. An graduated from University of Miami Leonard M. Miller School of Medicine in 1988.
Has Dr. Gary Chun-I An received payments from drug or device companies?
CMS Open Payments shows $67 in general payments to Dr. An from 2 companies from 2022 to 2024. The largest total came from La Jolla Pharmaceutical Company.
How long has Dr. Gary Chun-I An been practicing?
Dr. An graduated from medical school in 1988, 38 years ago.
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