DR. RAMJI RAMASWAMY RAJENDRAN (MD) – Radiation Oncology Physician, NPI 1982760773
Radiation Oncology Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
313 RADIATION ONCOLOGY in IL
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Provider Addresses for DR. RAMJI RAMASWAMY RAJENDRAN (MD)
700, Commerce Drive, Oak Brook, DuPage County, Illinois, 60523, United States
SUITE 500
OAK BROOK, IL 605231546
Phone: (847) 698-0600
Fax: (847) 698-0601
Type: Mailing
Alexian Brothers Medical Center, 800, Biesterfield Road, Elk Grove Village, Elk Grove Township, Cook County, Illinois, 60007, United States
SUITE 110
ELK GROVE VILLAGE, IL 600073361
Phone: (847) 981-5760
Fax: (847) 956-5138
Type: Location
1700 Luther Ln
Park Ridge, IL 600681270
Phone: (847) 723-8030
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 121 Open Payments records for all available years, with a total value of $122,217.
Total Amount is formed as General ($122,217) + Research ($0) + Ownership ($0) = $122,217.
Last reported payment date: 2024-12-18 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($41,618).
Total Amount
$122,217
General + Research + Ownership
Payments
121
Total payment records
General Amount
$122,217
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-18
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $41,618 |
| Novocure Inc. | $41,446 |
| Davol Inc. | $33,000 |
| Novartis Pharmaceuticals Corporation | $2,962 |
| Bayer Healthcare Pharmaceuticals Inc. | $2,024 |
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: 2010-08-18
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20100818000121 | I | Radiation Oncology | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 77014 | Ct guidance for insertion of radiation therapy fields | 638 | 85 | $0 |
| 77427 | Radiation treatment management, 5 treatment sessions | 206 | 68 | $0 |
| 77334 | Design and construction of complex radiation treatment device | 177 | 74 | $0 |
| 77300 | Calculation of radiation therapy dose | 159 | 50 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 117 | 83 | $0 |
Insurance plans in this area (ZIP 60523)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Radiation Oncology | IL | |
| Radiation Oncology | NY | |
| Radiation Oncology | IL | |
| - | IL | |
| Radiation Oncology | IL | |
| Radiation Oncology | IL | |
| Radiation Oncology | IL | |
| Radiation Oncology | IL | |
| Radiation Oncology | IL | |
| Radiation Oncology | IL |
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