JOHN M O'BRIEN (MD) – Maternal & Fetal Medicine Physician, NPI 1528078748
Maternal & Fetal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
631 OBSTETRICS/GYNECOLOGY in KY
Provider Addresses for JOHN M O'BRIEN (MD)
800 ROSE STREET
ROOM C-368
LEXINGTON, KY 405360293
Phone: (859) 218-0765
Fax: (859) 218-7436
Type: Mailing
800, Rose Street, Academic Core, Lexington, Fayette County, Kentucky, 40506, United States
UNIVERSITY OF KENTUCKY
LEXINGTON, KY 405360294
Phone: (859) 257-2321
Type: Mailing
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: 2009-08-20
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 |
|---|---|---|---|---|
| I20090820000381 | I | Obstetrics/Gynecology | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 40536)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Diagnostic Radiology | KY | |
| A N E S T H E S I O L O G Y | FL | |
| Pediatric Medicine | KY | |
| Internal Medicine | KY | |
| H O S P I T A L I S T | OH | |
| Critical Care (Intensivists), Pulmonary Disease | KY | |
| Interventional Radiology, Diagnostic Radiology | KY | |
| Internal Medicine | KY | |
| Thoracic Surgery, Cardiac Surgery | KY | |
| Pediatric Medicine, Internal Medicine | KY |
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