WILLIAM ZATO (DO) – Family Medicine Physician, NPI 1497796809
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,861 FAMILY PRACTICE in IN
Provider Addresses for WILLIAM ZATO (DO)
7805 TAFT ST STE E
MERRILLVILLE, IN 464105237
Phone: (219) 230-4667
Fax: (219) 756-3793
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 9 Open Payments records for all available years, with a total value of $344.
Total Amount is formed as General ($344) + Research ($0) + Ownership ($0) = $344.
Last reported payment date: 2024-10-03 • Largest payer in this snapshot: ABBVIE INC. ($131).
Total Amount
$344
General + Research + Ownership
Payments
9
Total payment records
General Amount
$344
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-03
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $131 |
| Tris Pharma Inc | $115 |
| Orexo US, Inc. | $80 |
| Corium, LLC | $17 |
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: 2010-01-21
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 |
|---|---|---|---|---|
| I20100121000422 | I | Family Practice | IN | 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 |
|---|---|---|---|---|
| 99310 | Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 87 | 84 | $0 |
| 99309 | Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 58 | 57 | $0 |
Insurance plans in this area (ZIP 46410)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | IN | |
| Nurse Practitioner | IN | |
| Nurse Practitioner | IN | |
| Nurse Practitioner | IN | |
| Internal Medicine | IN | |
| Infectious Disease, Internal Medicine | IN | |
| Nurse Practitioner | IN |
Reviews
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