John Y.M. Koo, MD
NPI 1245289594ActiveIndividual· Psychiatry & Neurology, Psychiatry· San Francisco, CA
Psychiatry & Neurology, Psychiatry (MD) in San Francisco, California, trained at Harvard Medical School (class of 1981). Their prescriptions cost Medicare Part D more than their services did: $216,949 for 108 claims, against $9,881 paid for services in 2024. Sun Pharmaceutical Industries Inc. was the largest of 19 companies reporting payments in 2025, $420,914 in all, mostly speaking and faculty fees.
Overview
| NPI | 1245289594 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 6, 2006 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | G48584 | CA |
| Dermatology | 207N00000X | G48584 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Dermatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 35 |
|---|---|
| Services billed | 144 across 10 procedure codes |
| Paid by Medicare | $9,881 |
Part D prescriptions in 2024
| Prescriptions (claims) | 108 · 127 30-day fills |
|---|---|
| Patients | 19 |
| Total drug cost | $216,949 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Dermatology |
| Secondary specialties | Psychiatry |
| Telehealth | Offers telehealth |
Medical group
- University of California San FranciscoSan Francisco, CA · 1,839 clinicians
Hospital affiliation
- UCSF Medical CenterSan Francisco, CA
Industry payments (Open Payments)
- 2025$420,914 · 323 payments from 19 companies
- 2024$420,869 · 410 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Sun Pharmaceutical Industries Inc. | $117,976 | 59 |
| Lilly USA, LLC | $88,263 | 72 |
| Pfizer Inc. | $55,585 | 19 |
| Regeneron Healthcare Solutions, Inc. | $43,085 | 43 |
| Galderma Laboratories, L.P. | $31,379 | 34 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$243,329 · 73 payments
- Compensation for serving as faculty or as a speaker for a medical education program$92,240 · 9 payments
- Travel and Lodging$40,778 · 107 payments
- Consulting Fee$36,835 · 12 payments
- Food and Beverage$7,732 · 122 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Psychiatry & Neurology, Psychiatry providers in San Francisco
- 1336648690
- 1447946769
- 1386578938
- 1235368234
- 1184519241
- 1003747759
- 1184876690
- 1326393711
- 1134584097
- 1073072658
- 1144800350
- 1811524754
All Psychiatry & Neurology, Psychiatry providers in California →