MERRILL ZAHTZ (M.D.) – Internal Medicine Physician, NPI 1225097819
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
8,828 INTERNAL MEDICINE in IL
Provider Addresses for MERRILL ZAHTZ (M.D.)
6374 N LINCOLN AVE
CHICAGO, IL 606591275
Phone: (872) 270-5999
Type: Location
3525, West Granville Avenue, North Park, Chicago, Jefferson Township, Cook County, Illinois, 60646, United States
CHICAGO, IL 606592221
Phone:
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 3 Open Payments records for all available years, with a total value of $78.
Total Amount is formed as General ($78) + Research ($0) + Ownership ($0) = $78.
Last reported payment date: 2024-09-19 • Largest payer in this snapshot: PFIZER INC. ($33).
Total Amount
$78
General + Research + Ownership
Payments
3
Total payment records
General Amount
$78
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-09-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| PFIZER INC. | $33 |
| Amgen Inc. | $23 |
| Novo Nordisk Inc | $22 |
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: 2005-09-28
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 |
|---|---|---|---|---|
| I20050928000454 | I | Internal Medicine | IL | 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 60659)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Mental Health Counselor | IL | |
| Nurse Practitioner | IL | |
| Clinical Social Worker | NJ | |
| Clinical Social Worker | IL | |
| Mental Health Counselor | IL | |
| Marriage And Family Therapist | IL | |
| Mental Health Counselor | IL | |
| Nurse Practitioner | IL | |
| Clinical Psychologist | IL | |
| Mental Health Counselor | IL |
Reviews
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