JOHN B WILLIAMSON (PHD) – Clinical Neuropsychologist, NPI 1215224977
Clinical Neuropsychologist
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,602 CLINICAL PSYCHOLOGIST in FL
Provider Addresses for JOHN B WILLIAMSON (PHD)
PO BOX 918025
ORLANDO, FL 328910001
Phone:
Type: Mailing
1600 SW ARCHER RD
GAINESVILLE, FL 326104004
Phone: (352) 265-0301
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
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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: 2012-01-13
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 |
|---|---|---|---|---|
| I20120113000753 | I | Clinical Psychologist | FL | 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 |
|---|---|---|---|---|
| 96139 | Administration of psychological or neuropsychological test by technician, each additional 30 minutes | 151 | 29 | $0 |
| 96133 | Evaluation of neuropsychological test, each additional hour | 30 | 29 | $0 |
| 96132 | Evaluation of neuropsychological test, first hour | 29 | 29 | $0 |
| 96138 | Administration of psychological or neuropsychological test by technician, first 30 minutes | 29 | 29 | $0 |
| 90791 | Psychiatric diagnostic evaluation | 26 | 26 | $0 |
Insurance plans in this area (ZIP 32891)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| PSYCHOLOGIST, CLINICAL | FL | 96118 | Neuropsychological testing, interpretation, and report by psychologist or physician per hour | 32 | 16 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | FL | |
| Clinical Psychologist | FL | |
| - | FL | |
| Mental Health Counselor | FL | |
| Clinical Psychologist | FL | |
| - | FL | |
| Clinical Psychologist | MA | |
| Clinical Psychologist | FL | |
| Clinical Psychologist | FL | |
| Clinical Psychologist | FL |
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