GILLIAN HARRISON (MD) – Neurological Surgery Physician, NPI 1528405180
Neurological Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
529 NEUROLOGY in IN
Provider Addresses for GILLIAN HARRISON (MD)
13345 ILLINOIS ST
CARMEL, IN 460323318
Phone: (317) 396-1300
Type: Mailing
9200 W WISCONSIN AVE
MILWAUKEE, WI 532263522
Phone: (414) 805-8710
Fax: (414) 955-0115
Type: Mailing
4320 SEMINARY RD
ALEXANDRIA, VA 223041535
Phone: (703) 504-3000
Fax: (703) 504-3388
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 9 Open Payments records for all available years, with a total value of $1,076.
Total Amount is formed as General ($1,076) + Research ($0) + Ownership ($0) = $1,076.
Last reported payment date: 2024-05-30 • Largest payer in this snapshot: Spineology Inc. ($534).
Total Amount
$1,076
General + Research + Ownership
Payments
9
Total payment records
General Amount
$1,076
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-05-30
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Spineology Inc. | $534 |
| Stryker Corporation | $211 |
| DePuy Synthes Sales Inc. | $116 |
| Kuros Biosciences USA, Inc | $91 |
| GT Medical Technologies, Inc | $89 |
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: 2023-02-17
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20230217000358 | I | Neurology | DC | TBD |
| I20230217000411 | I | Neurology | VA | 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 |
|---|---|---|---|---|
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 110 | 108 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 93 | 63 | $0 |
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 80 | 48 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 46 | 39 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 40 | 40 | $0 |
Insurance plans in this area (ZIP 46032)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| N E U R O L O G Y | HI | |
| H E M A T O L O G Y | WA | |
| - | VIR | |
| - | IL | |
| Orthopedic Surgery | VA | |
| - | VA | |
| Diagnostic Radiology | VA | |
| General Surgery | CT | |
| - | VA | |
| N E U R O S U R G E R Y | VA |
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