DR. MARK W DAY (D.O) – Obstetrics & Gynecology Physician, NPI 1225050560
Obstetrics & Gynecology Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
1,818 OBSTETRICS/GYNECOLOGY in OH
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Provider Addresses for DR. MARK W DAY (D.O)
SR 122, Middletown, Warren County, Ohio, United States
MIDDLETOWN, OH 450055201
Phone: (513) 261-3500
Fax: (513) 261-3509
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 5 Open Payments records for all available years, with a total value of $119.
Total Amount is formed as General ($119) + Research ($0) + Ownership ($0) = $119.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: Medical Device Business Services, Inc. ($34).
Total Amount
$119
General + Research + Ownership
Payments
5
Total payment records
General Amount
$119
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2005-01-25
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 |
|---|---|---|---|---|
| I20050125000636 | I | Obstetrics/Gynecology | OH | 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 45005)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Geriatric Medicine, Hematology/Oncology | IL | |
| Nurse Practitioner | OH | |
| Hematology/Oncology, Internal Medicine | OH | |
| Radiation Oncology | OH | |
| Nurse Practitioner | OH | |
| O B S T E T R I C S/ G Y N E C O L O G Y | OH | |
| Orthopedic Surgery | OH | |
| Pulmonary Disease, Critical Care (Intensivists), Sleep Medicine | OH | |
| Physician Assistant | OH | |
| Hospitalist, Emergency Medicine | OH |
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