Karen Mai Horton, MD, MSC, FRCSC
NPI 1164463881ActiveIndividual· Plastic Surgery· San Francisco, CA
Opted out of Medicare from January 2018 to January 2028. Plastic Surgery (MD, MSC, FRCSC) in San Francisco, California, licensed in CA, with an NPI issued in June 2006. Part D covered 28 prescriptions written in 2024, 100% of them generic. Abbvie Inc. was the largest of 6 companies reporting payments in 2025, $937.80 in all, mostly food and beverage.
Overview
| NPI | 1164463881 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, MSC, FRCSC |
| Sole proprietor | Yes |
| NPI issued | Jun 10, 2006 |
| Last updated in NPPES | Jul 3, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Plastic Surgery Primary | 208200000X | A87734 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Jan 1, 2018 – Jan 1, 2028 |
| Can order and refer | Yes |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Part D prescriptions in 2024
| Prescriptions (claims) | 28 · 28 30-day fills |
|---|---|
| Patients | 13 |
| Total drug cost | $140.79 |
| Generic share | 100% of claims |
Industry payments (Open Payments)
- 2025$937.80 · 23 payments from 6 companies
- 2024$1,982 · 31 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $544.25 | 16 |
| Becton, Dickinson and Company | $213.96 | 2 |
| Revance Therapeutics, Inc. | $74.51 | 1 |
| Galderma Laboratories, L.P. | $46.62 | 2 |
| Vertex Pharmaceuticals Incorporated | $36.02 | 1 |
What the 2025 payments were for
- Food and Beverage$781.57 · 21 payments
- Travel and Lodging$156.23 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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