JOHN D WILLIAMSON (M.D.) – Anatomic Pathology & Clinical Pathology Physician, NPI 1154324598
Anatomic Pathology & Clinical Pathology Physician
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Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
228 PATHOLOGY in KY
Provider Addresses for JOHN D WILLIAMSON (M.D.)
Box Car Way, Louisville, Jefferson County, Kentucky, 40272, United States
LOUISVILLE, KY 402950251
Phone: (502) 897-9594
Fax: (502) 896-1808
Type: Mailing
2307 GREENE WAY
LOUISVILLE, KY 402204009
Phone: (502) 897-9594
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $136.
Total Amount is formed as General ($136) + Research ($0) + Ownership ($0) = $136.
Last reported payment date: 2024-03-28 • Largest payer in this snapshot: Hologic Sales and Service, LLC ($136).
Total Amount
$136
General + Research + Ownership
Payments
1
Total payment records
General Amount
$136
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-03-28
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Hologic Sales and Service, LLC | $136 |
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: 2010-11-24
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 |
|---|---|---|---|---|
| I20101124000251 | I | Pathology | KY | 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 |
|---|---|---|---|---|
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | 517 | 316 | $0 |
| 88341 | Special stained specimen slides to examine tissue, each additional procedure | 381 | 49 | $0 |
| 88342 | Special stained specimen slides to examine tissue, initial procedure | 101 | 85 | $0 |
| 88304 | Pathology examination of tissue using a microscope, moderately low complexity | 73 | 63 | $0 |
| 88307 | Pathology examination of tissue using a microscope, moderately high complexity | 56 | 43 | $0 |
Insurance plans in this area (ZIP 40295)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| P A T H O L O G Y | KY | |
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| P A T H O L O G Y | KY | |
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| P A T H O L O G Y | MI | |
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| P A T H O L O G Y | NC | |
| P A T H O L O G Y | NE |
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