Rosa Young Ahn-Horst, MD MPH
Psychiatry · Palo Alto
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- Not verified
- Not the same as out of network.
- Office
- 1
Offices
1 location
Plan participation
Not verified
We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Dr. Ahn-Horst’s office at (650) 723-5511 to ask if they take your plan before you enroll.
Drugs they prescribed that Part D paid
$3,676
Pharmacies billed $3,676 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 0% of their Part D prescriptions (0 of 122) in 2024. At or below the middle of the specialty; the typical psychiatry & neurology clinician is at 0%.
122 generic and 0 brand-name prescriptions · $3,676 in drug cost.
Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.
| Bupropion Xl | 13 | $918 | $71 |
| Lurasidone | 15 | $194 | $13 |
| Lithium Carbonate Er | 13 | $159 | $12 |
| Clonazepam | 11 | $134 | $12 |
Year by year
| 2024 | 122 | None | 0% (0) | 0% | $3,676 |
| 2023 | 78 | 13 | None | None | $2,568 |
| 2022 | 45 | 19 | 0% (0) | None | $2,911 |
| 2021 | 17 | None | 0% (0) | None | $628 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
Professional record
- NPI
- 1649822420
More record details
- Sole proprietor
- No
- Taxonomy
- Psychiatry (2084P0800X); Student in a training program (390200000X)
- Mailing address
- 401 Quarry Rd, Palo Alto, CA, 94304
- NPI first listed
- 2019-07-12
- NPI last updated
- 2026-07-27
- NPI record certified
- 2026-07-27
This is when the NPI record was last certified, not a medical board exam.