ANDREJ ZAJAC (M.D.) – Radiation Oncology Physician, NPI 1316929623
Radiation Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
159 RADIATION ONCOLOGY in IN
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Provider Addresses for ANDREJ ZAJAC (M.D.)
9201, Calumet Avenue, Munster, Lake County, Indiana, 46321, United States
MUNSTER, IN 463212807
Phone: (219) 836-9024
Fax: (219) 836-0034
Type: Mailing
Community Hospital, 901, MacArthur Boulevard, Munster, Lake County, Indiana, 46321, United States
RADIATION ONCOLOGY DEPARTMENT
MUNSTER, IN 463212901
Phone: (219) 836-6390
Type: Location
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 $105.
Total Amount is formed as General ($105) + Research ($0) + Ownership ($0) = $105.
Last reported payment date: 2024-10-30 • Largest payer in this snapshot: Tactile Systems Technology Inc ($42).
Total Amount
$105
General + Research + Ownership
Payments
5
Total payment records
General Amount
$105
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-30
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: 2008-08-08
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 |
|---|---|---|---|---|
| I20080808000696 | I | Radiation Oncology | 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 |
|---|---|---|---|---|
| 77300 | Calculation of radiation therapy dose | 484 | 100 | $0 |
| G6002 | Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy | 372 | 40 | $0 |
| 77427 | Radiation treatment management, 5 treatment sessions | 352 | 98 | $0 |
| 77334 | Design and construction of complex radiation treatment device | 287 | 108 | $0 |
| 77014 | Ct guidance for insertion of radiation therapy fields | 185 | 41 | $0 |
Insurance plans in this area (ZIP 46321)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Critical Care (Intensivists) | IL | |
| - | IN | |
| Nurse Practitioner | IN | |
| - | IN | |
| Cardiovascular Disease (Cardiology), Cardiac Electrophysiology | IL | |
| Nurse Practitioner | IN | |
| - | IN | |
| Gynecological Oncology, Obstetrics/Gynecology | IN | |
| - | IN | |
| Nurse Practitioner | IN |
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