KATHLEEN CLAIRE HORST (M.D.) – Radiation Oncology Physician, NPI 1144385386
Radiation Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
679 RADIATION ONCOLOGY in CA
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Provider Addresses for KATHLEEN CLAIRE HORST (M.D.)
Cafe Salute, 875, Blake Wilbur Drive, Stanford, Palo Alto, Santa Clara County, California, 94305-6015, United States
CC-G221A
PALO ALTO, CA 943042205
Phone: (650) 736-7715
Fax: (650) 725-8231
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2004-08-31
PECOS data refreshed: 2026-06-15
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20040831001431 | I | Radiation Oncology | CA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 77334 | Design and construction of complex radiation treatment device | 250 | 54 | $0 |
| 77300 | Calculation of radiation therapy dose | 212 | 51 | $0 |
| 77427 | Radiation treatment management, 5 treatment sessions | 122 | 57 | $0 |
| G6002 | Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy | 95 | 31 | $0 |
| 99212 | Established patient office or other outpatient visit, 10-19 minutes | 59 | 52 | $0 |
Insurance plans in this area (ZIP 94304)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| O B S T E T R I C S/ G Y N E C O L O G Y | TX | |
| - | CA | |
| - | CA | |
| - | CA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | CA | |
| Plastic And Reconstructive Surgery | CA | |
| Pain Management, Anesthesiology | CA | |
| A N E S T H E S I O L O G Y | CA | |
| Sleep Medicine | FL | |
| A N E S T H E S I O L O G Y | MA |
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