Irene Seungwan Sonu, MD
NPI 1801100300ActiveIndividual· Internal Medicine, Gastroenterology· Palo Alto, CA
Internal Medicine, Gastroenterology (MD) with Stanford Health Care, practicing in Palo Alto, California. Their prescriptions cost Medicare Part D more than their services did: $508,396 for 1,560 claims, against $95,752 paid for services in 2024. Anx Robotica Corp was the largest of 4 companies reporting payments in 2025, $5,157 in all, mostly travel and lodging. Lists Stanford Health Care and 1 other hospital as hospital affiliations.
Overview
| NPI | 1801100300 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 27, 2010 |
| Last updated in NPPES | Apr 16, 2024 |
| Certified by provider | Apr 16, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A117977 | CA |
| Internal Medicine | 207R00000X | A117977 | CA |
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 | 579 |
|---|---|
| Services billed | 1,114 across 50 procedure codes |
| Paid by Medicare | $95,752 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,560 · 2,097 30-day fills |
|---|---|
| Patients | 336 |
| Total drug cost | $508,396 |
| Generic share | 62% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliations
- Stanford Health CareStanford, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
Industry payments (Open Payments)
- 2025$5,157 · 6 payments from 4 companies
- 2024$338.16 · 5 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Anx Robotica Corp | $4,825 | 2 |
| Celltrion, Inc. | $150.00 | 1 |
| Aimmune Therapeutics, Inc. | $114.82 | 2 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $67.88 | 1 |
What the 2025 payments were for
- Travel and Lodging$4,825 · 2 payments
- Food and Beverage$332.70 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Palo Alto
- 1154548998
- 1457420861
- 1891896320
- 1497817746
- 1598949521
- 1750394532
- 1467539643
- 1689052235
- 1346267093
- 1972678639
- 1790947331
- 1689731200
All Internal Medicine, Gastroenterology providers in California →