Diagnostic ImagingEsophageal Sphincter, LowerEsophagogastric Junction
Dr. Alexander Kyungjin Han, MD
NPI1790967743PAC ID8325219371
- Medicare patients, 2024
- 17
- Part D claims, 2024
- 759
- Publications
- 2
- Hospital affiliations
- 1
- Industry payments
- $601
- Practice address
- 9965 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Permanente - Fontana Medical Center
Fontana, California
Find Dr. Han's professional email, personal email and mobile number
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Dr. Alexander Kyungjin Han is a gastroenterologist in Fontana, California
Dr. Han practices at Kaiser Permanente - Fontana Medical Center in Fontana, California.
Dr. Han's NPI, 1790967743, was assigned on December 1, 2007. Dr. Han graduated from Feinberg School of Medicine in 2005. Dr. Han holds California license A102857.
NPI and contact details
- NPI
- 1790967743NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8325219371
- NPI enumeration date
- December 1, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 427-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alexander Kyungjin Han practices at Kaiser Permanente - Fontana Medical Center in Fontana, California
Dr. Han's primary practice is Kaiser Permanente - Fontana Medical Center, at 9965 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-5000.
- Kaiser Permanente - Fontana Medical Center9965 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-5000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Alexander Kyungjin Han is affiliated with 2 sites of care and 1 medical group
Dr. Han's primary practice is Kaiser Permanente - Fontana Medical Center in Fontana, California. Dr. Han is also affiliated with Fontana Medical Center. The medical group on file is Southern California Permanente Medical Group.
Kaiser Permanente - Fontana Medical CenterPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Alexander Kyungjin Han's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Han practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente - Fontana Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alexander Kyungjin Han is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Han's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Han is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Han is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Han
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. Alexander Kyungjin Han treated 17 Medicare patients in 2024, average age 67
CMS counts 17 Medicare patients who saw Dr. Han in 2024. Their average risk score is 2.01, 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. Han's median patient age at 56, with 57% women.
Medicare patients, 202417
Average age67
Average risk score2.01
Dr. Han's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Alexander Kyungjin Han wrote 759 Medicare Part D claims in 2024
In 2024, Dr. Han wrote 759 Medicare Part D claims for 357 patients. 80% of them were for generic drugs. CMS names the drug for 663 of them, across 23 drugs with 11 or more claims each, at $734,455 in total drug cost. In 2023, CMS named 652 claims across 22 drugs.
Part D claims, 2024759
Drugs named by CMS23
Total drug cost$734,455
Part D patients357
Dr. Han's Part D claims by kind of drug, 2024
- Generic604 claims80%
- Brand-name155 claims20%
Dr. Han'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. Han's Part D claims, 2024
- Antibiotics8%57 of 759 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: 6522024: 6632%
Drugs named by CMS: 23 in 2024, 22 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. Alexander Kyungjin Han takes part in Medicare
Dr. Han accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Alexander Kyungjin Han has 2 publications on record
Dmand AI links 2 papers to Dr. Han in 2006. The most frequent topics are Esophageal Sphincter, Lower, Gastroesophageal Reflux and Manometry.
Papers2
Topics Dr. Han writes about most
- Esophageal Sphincter, Lower
- Gastroesophageal Reflux
- Manometry
- Muscle Relaxation
Recent publications by Dr. Han
Neurogastroenterol Motil
EructationEsophageal Sphincter, LowerEsophageal Sphincter, Upper
See who Dr. Han researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Han 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. Alexander Kyungjin Han received $601 in industry payments from 2016 to 2024
CMS Open Payments shows 10 general payments to Dr. Han from 3 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 58% of the total. Boston Scientific Corporation paid the most, $339.
General payments to Dr. Han by program year, 2016 to 2024
General payments to Dr. Han by kind, 2016 to 2024
$601in total
- Food and beverage$35158%
- Travel and lodging$25042%
Companies that paid Dr. Han 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. Alexander Kyungjin Han graduated from Feinberg School of Medicine
Dr. Han graduated from Feinberg School of Medicine in 2005.
- Medical school
- Board certified in gastroenterology
Source: Dmand AI Professional Profile Data
Dr. Alexander Kyungjin Han accepts plans from 2 insurance carriers
Dr. Han is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Han accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Alexander Kyungjin Han'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 DataDmand AI Org Hierarchy Data |
| 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) |
| 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) |
| 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. Alexander Kyungjin Han
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. Alexander Kyungjin Han's NPI number?
Dr. Alexander Kyungjin Han's NPI number is 1790967743. It was assigned on December 1, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Alexander Kyungjin Han?
Dr. Alexander Kyungjin Han is a gastroenterologist in Fontana, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Alexander Kyungjin Han practice?
Dr. Han practices at 9965 Sierra Ave, Fontana, CA 92335. Dr. Han's primary practice is Kaiser Permanente - Fontana Medical Center in Fontana, California.
What is Dr. Alexander Kyungjin Han's office phone number?
The practice phone on file for Dr. Han is (909) 427-5000.
What is Dr. Alexander Kyungjin Han's medical license number?
Dr. Han holds California license A102857.
Which hospitals is Dr. Alexander Kyungjin Han affiliated with?
Dr. Han is affiliated with Fontana Medical Center.
What medical group is Dr. Alexander Kyungjin Han part of?
Dr. Han is linked to Southern California Permanente Medical Group.
Does Dr. Alexander Kyungjin Han accept Medicare?
Yes. CMS lists Dr. Han as accepting Medicare assignment.
How many Medicare patients does Dr. Alexander Kyungjin Han see?
CMS counts 17 Medicare patients who saw Dr. Han in 2024, with an average age of 67.
Is Dr. Alexander Kyungjin Han board certified?
Yes. Dr. Han is board certified in gastroenterology by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
Where did Dr. Alexander Kyungjin Han go to medical school?
Dr. Han graduated from Feinberg School of Medicine in 2005.
What drugs does Dr. Alexander Kyungjin Han prescribe most?
In 2024 Medicare Part D data, Dr. Han's most prescribed drugs by claims were Gavilyte-C, Omeprazole and Mesalamine.
Has Dr. Alexander Kyungjin Han received payments from drug or device companies?
CMS Open Payments shows $601 in general payments to Dr. Han from 3 companies from 2016 to 2024. The largest total came from Boston Scientific Corporation.
How long has Dr. Alexander Kyungjin Han been practicing?
Dr. Han graduated from medical school in 2005, 21 years ago.
Does Dr. Alexander Kyungjin Han do research?
Dmand AI links 2 publications to Dr. Han.
What insurance does Dr. Alexander Kyungjin Han accept?
Dr. Han is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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