Joo Ha Hwang, MD
NPI 1194815043ActiveIndividual· Internal Medicine, Gastroenterology· Stanford, CA
Internal Medicine, Gastroenterology (MD) in Stanford, California, trained at University of Chicago, Pritzker School of Medicine (class of 1997). In 2024 Medicare paid $74,362 for 182 patients, and Part D covered 53 of their prescriptions, 68% of them generic. Olympus Corporation of the Americas was the largest of 13 companies reporting payments in 2025, $213,271 in all, mostly consulting fees.
Overview
| NPI | 1194815043 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 13, 2006 |
| Last updated in NPPES | Apr 26, 2024 |
| Certified by provider | Apr 26, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | C152676 | CA |
| Internal Medicine, Gastroenterology | 207RG0100X | MD00037747 | WA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 182 |
|---|---|
| Services billed | 420 across 55 procedure codes |
| Paid by Medicare | $74,362 |
Part D prescriptions in 2024
| Prescriptions (claims) | 53 · 65 30-day fills |
|---|---|
| Patients | 44 |
| Total drug cost | $1,531 |
| Generic share | 68% of claims |
Education and affiliations
| Medical school | University of Chicago, Pritzker School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliation
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
- 2025$213,271 · 202 payments from 13 companies
- 2024$196,550 · 190 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Olympus Corporation of the Americas | $67,588 | 89 |
| Boston Scientific Corporation | $56,383 | 58 |
| Capsovision, Inc. | $39,798 | 5 |
| Olympus Corporation | $25,922 | 21 |
| Olympus America Inc. | $9,530 | 2 |
What the 2025 payments were for
- Consulting Fee$91,551 · 22 payments
- Education$59,630 · 22 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$36,300 · 15 payments
- Travel and Lodging$21,864 · 74 payments
- Food and Beverage$3,927 · 69 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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