Ampulla of VaterCholecystitis, AcuteCholestasis, Extrahepatic
Dr. Seng-Ian Gan, MD
NPI1700833498
- Medicare services, 2017
- 478
- Part D claims, 2017
- 113
- Publications
- 6
- Industry payments
- $9,584
- Affiliated sites
- 1
- Practice address
- 1100 9th Ave, Seattle, WA 98101-2756
- Practice phone
- Call (206) 223-6600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Seattle Extracorporeal
Multi-specialty group site · Seattle, Washington
Find Dr. Gan'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. Seng-Ian Gan is a gastroenterologist in Seattle, Washington
Dr. Gan practices at Seattle Extracorporeal in Seattle, Washington.
Dr. Gan's NPI, 1700833498, was assigned on May 28, 2006. Dr. Gan holds Washington license MD60027255.
NPI and contact details
- NPI
- 1700833498NPI Registry (opens in a new tab)
- NPI enumeration date
- May 28, 2006
- NPI status
- Active
- Practice phone
- (206) 223-6600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Seng-Ian Gan practices at Seattle Extracorporeal in Seattle, Washington
Dr. Gan's primary practice is Seattle Extracorporeal, at 1100 9th Ave, Seattle, WA 98101-2756. The practice phone is (206) 223-6600.
- Seattle Extracorporeal1100 9th Ave, Seattle, WA 98101-2756Phone(206) 223-6600
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Seng-Ian Gan is affiliated with 1 site of care and 1 medical group
Dr. Gan's primary practice is Seattle Extracorporeal in Seattle, Washington. Dmand AI also links Dr. Gan to 1 medical group, named with a free account.
Seattle ExtracorporealPrimary
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Seng-Ian Gan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Seattle Extracorporeal | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Seng-Ian Gan is one of 434 gastroenterologists in Washington
Gastroenterology is Dr. Gan's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Gan's licenses on file in 2 states: Washington and Massachusetts.
Specialties and state licenses
- Gastroenterology, WashingtonPrimary
- Massachusetts license
Gastroenterologists near Dr. Gan
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. Seng-Ian Gan billed Medicare for 478 services in 2017
CMS data shows 478 Medicare services from Dr. Gan across 19 procedure codes in 2017. Medicare paid $58,513 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2017478
Paid by Medicare$58,513
Procedure codes19
Dr. Gan's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Surgery
- 2016: 4782017: 29339%
- Office and hospital visits
- 2016: 2342017: 10854%
- Imaging
- 2016: 1242017: 7738%
- Other services
- 2016: 302017: 0100%
Dr. Gan compared with the Washington median for gastroenterologists, 2017
- Dr. Gan
- Washington median
- Medicare services
- 478vs 35634% above
- Part D claims
- 113vs 27258% below
Medians across 433 gastroenterologists in Washington with Dmand AI profiles that report each measure.
Dr. Gan's most billed Medicare procedure codes, 2017
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. Gan and other gastroenterologists in Washington.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Seng-Ian Gan's patients have a median age of 62
Across all payers, Dmand AI patient panel data puts Dr. Gan's median patient age at 62, with 50% women.
Dr. Gan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Seng-Ian Gan wrote 113 Medicare Part D claims in 2017
In 2017, Dr. Gan wrote 113 Medicare Part D claims. They cover 4 drugs, with $11,662 in total drug cost. In 2016, CMS named 211 claims across 6 drugs.
Part D claims, 2017113
Drugs named by CMS4
Total drug cost$11,662
Dr. Gan's most prescribed drugs by claims, 2017
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, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 2112017: 11346%
Drugs named by CMS: 4 in 2017, 6 in 2016.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Seng-Ian Gan has 6 publications on record
Dmand AI links 6 papers to Dr. Gan, published from 2010 to 2019. 2015 was the busiest year, with 2. The most frequent topics are Ampulla of Vater, Endoscopy, Digestive System and Endosonography. Dr. Gan has published most often in Gastrointest Endosc. Dr. Gan's most frequent co-authors are Shayan Irani, MD, Richard A. Kozarek, MD and Michael Gluck, MD.
Papers6
Years published2010 to 2019
Dr. Gan's papers by year, 2010 to 2019
Topics Dr. Gan writes about most
- Ampulla of Vater
- Endoscopy, Digestive System
- Endosonography
- Stents
Dr. Gan's most frequent co-authors
- Shayan Irani, MD4 shared papers
- Richard A. Kozarek, MD3 shared papers
- Michael Gluck, MD2 shared papers
Recent publications by Dr. Gan
Cholangiopancreatography, Endoscopic RetrogradeClinical CompetenceEndosonography
AdenocarcinomaAmpulla of VaterAntineoplastic Agents
See who Dr. Gan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gan works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Seng-Ian Gan received $9,584 in industry payments from 2016 to 2017
CMS Open Payments shows 13 general payments to Dr. Gan from 4 drug and device companies from 2016 to 2017. Consulting fees make up the largest share, 52% of the total. Pinnacle Biologics, Inc paid the most, $3,789.
General payments to Dr. Gan by program year, 2016 to 2017
General payments to Dr. Gan by kind, 2016 to 2017
$9.6Kin total
- Consulting fees$5,00052%
- Speaker and faculty fees$3,00031%
- Travel and lodging$1,43815%
- Food and beverage$1462%
Companies that paid Dr. Gan the most, 2016 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Seng-Ian Gan'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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) |
| 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. Seng-Ian Gan
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. Seng-Ian Gan's NPI number?
Dr. Seng-Ian Gan's NPI number is 1700833498. It was assigned on May 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Seng-Ian Gan?
Dr. Seng-Ian Gan is a gastroenterologist in Seattle, Washington. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Seng-Ian Gan practice?
Dr. Gan practices at 1100 9th Ave, Seattle, WA 98101-2756. Dr. Gan's primary practice is Seattle Extracorporeal in Seattle, Washington. Dmand AI also links Dr. Gan to 1 medical group.
What is Dr. Seng-Ian Gan's office phone number?
The practice phone on file for Dr. Gan is (206) 223-6600.
What is Dr. Seng-Ian Gan's medical license number?
Dr. Gan holds Washington license MD60027255, one of the licenses on file in 2 states.
Which states has Dr. Seng-Ian Gan been licensed in?
Dmand AI has state licenses on file for Dr. Gan in Washington and Massachusetts.
Does Dr. Seng-Ian Gan accept Medicare?
Yes. CMS data shows Dr. Gan billed Medicare for 478 services in 2017.
What services does Dr. Seng-Ian Gan bill to Medicare?
In 2017, Dr. Gan's most billed Medicare services were diagnostic imaging (74328), surgery: digestive system (43264) and surgery: digestive system (43274).
What drugs does Dr. Seng-Ian Gan prescribe most?
In 2017 Medicare Part D data, Dr. Gan's most prescribed drugs by claims were Gavilyte-G, Ondansetron HCl and Omeprazole.
Has Dr. Seng-Ian Gan received payments from drug or device companies?
CMS Open Payments shows $9,584 in general payments to Dr. Gan from 4 companies from 2016 to 2017. The largest total came from Pinnacle Biologics, Inc.
Show 3 more questionsShow fewer questions
How long has Dr. Seng-Ian Gan been practicing?
Dr. Gan's NPI was assigned in 2006.
Does Dr. Seng-Ian Gan do research?
Dmand AI links 6 publications to Dr. Gan, published from 2010 to 2019.
Who does Dr. Seng-Ian Gan publish with?
Dr. Gan's most frequent co-authors are Shayan Irani, MD (4 shared papers), Richard A. Kozarek, MD (3 shared papers) and Michael Gluck, MD (2 shared papers).
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