Physician Profile
Unclaimed ProfileAbout HAN
Based in Fountain Valley, CA, Nancy Jeong-Sun Han, M.D. is listed in the NPI registry under gastroenterology. Nancy graduated from Ohio Medical University in 2005.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What kind of doctor is Dr. Han?
Dr. Han is a gastroenterology in Fountain Valley, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
What is Dr. Han's address?
Dr. Han is listed at 18035 BROOKHURST ST STE 2100, Fountain Valley, CA 92708. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Han?
The number on file is (657) 241-9090. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Han's NPI number?
Dr. Han's National Provider Identifier is 1609055300. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Han train?
Dr. Han attended Ohio Medical University, graduating in 2005. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Han been practising?
Dr. Han has 21 years experience. Calculated from a graduation year of 2005, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Han perform?
According to Medicare billing data, Dr. Han performs procedures including biopsy of large bowel using a flexible endoscope, removal of polyps or growths of large bowel using an endoscope with mechanical snare and biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Han confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Han. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (657) 241-9090
- Email not available
Practice Locations
18035 BROOKHURST ST STE 2100
Fountain Valley, CA 92708
Procedures Most Often Billed to Medicare
256 services · 234 patients · 7 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
64 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
42 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
31 |
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
14 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
53 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
28 |
| Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monit | Billing code | G0500 |
24 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterology specialists at this location 3
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 17 related providers in 4 groups
Other gastroenterology specialists in Fountain Valley 5
Same specialty, same city.
Trained at Ohio Medical University 1
Other providers in the same specialty who trained at the same institution.
Class of 2005 at Ohio Medical University 3
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of large bowel using a flexible endoscope 8
Providers in CA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.