GREGORY R TROST (MD) – Neurological Surgery Physician, NPI 1922074947
Neurological Surgery Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
155 NEUROSURGERY in WI
Provider Addresses for GREGORY R TROST (MD)
9701 TRAPPERS TRL
MIDDLETON, WI 535625061
Phone: (608) 203-6321
Type: Mailing
7974, UW Health Court, Discovery Springs, City of Middleton, Dane County, Wisconsin, 53562, United States
MIDDLETON, WI 535625531
Phone:
Type: Mailing
University Hospital Outpatient Pharmacy, 600, Highland Avenue, Madison, Dane County, Wisconsin, 53705-2221, United States
MADISON, WI 53792
Phone: (608) 263-7502
Fax: (608) 263-4995
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $5,250.
Total Amount is formed as General ($5,250) + Research ($0) + Ownership ($0) = $5,250.
Last reported payment date: 2023-05-08 • Largest payer in this snapshot: Bioventus LLC ($5,250).
Total Amount
$5,250
General + Research + Ownership
Payments
2
Total payment records
General Amount
$5,250
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-05-08
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Bioventus LLC | $5,250 |
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: 2008-05-15
PECOS data refreshed: 2026-05-27
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 |
|---|---|---|---|---|
| I20080515000042 | I | Neurosurgery | WI | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 52 | 32 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 36 | 36 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 23 | 23 | $0 |
| 63047 | Partial removal of spine bone with release of lower spinal cord and/or nerves, 1 segment | 15 | 15 | $0 |
| 99212 | Established patient office or other outpatient visit, 10-19 minutes | 12 | 11 | $0 |
Insurance plans in this area (ZIP 53562)
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