Active NPI
Ramji Ramaswamy Rajendran, MD
- Radiation Oncology Physician
- Elk Grove Village, IL
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Radiation Oncology Physician
- License
- 036-124964
- Practice address
- 800 Biesterfield Rd
Suite 110
Elk Grove Village, IL 60007-3361 - Phone
- (847) 981-5760
- Fax
- (847) 956-5138
- NPI assigned
- Dec 28, 2006
- Last updated
- May 18, 2026
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Radiation Oncology Physician | 2085R0001X | 036-124964 | IL | Primary |
Addresses
Primary practice location
800 Biesterfield Rd
Suite 110
Elk Grove Village, IL 60007-3361
Mailing address
700 Commerce Dr
Suite 500
Oak Brook, IL 60523-1546
Phone (847) 698-0600
Other practice location 1
1700 Luther Ln
Park Ridge, IL 60068-1270
Phone (847) 723-8030
Other practice location 2
2600 Patriot Blvd Ste J
Glenview, IL 60026-8024
Phone (224) 260-3100
Other identifiers 3
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 778401002 | Other | IL | MEDICARE PTAN |
| 036124964 | Medicaid | IL | |
| 558620004 | Other | IL | MEDICARE PTAN |
Electronic endpoints 2
| Type | Endpoint | Use | Affiliation |
|---|---|---|---|
| Direct Messaging Address | rrajendran236415@direct.myadvocateaurora.org | Direct | |
| FHIR URL | https://epicfhir.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/ |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in IL
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Radiation Oncology
- Education
- University of Illinois College of Med (CHI/Peor/Rock/CHM-Urb), 2005
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
2225 Enterprise Dr
Suite 2511
Westchester, IL 60154-5805
Phone (708) 486-0076
2600 Patriot Blvd
J
Glenview, IL 60026-8024
Phone (224) 260-3100
800 Biesterfield Rd
Suite 110
Elk Grove Village, IL 60007-3363
Phone (847) 981-5760
Hospital & facility affiliations
Merit-based Incentive Payment System (MIPS)
- Final score
- 71.69 of 100
- Quality
- 64.46
- Improvement activities
- 40
Merit-based Incentive Payment System (MIPS)
- Final score
- 95.19 of 100
- Quality
- 83.05
- Promoting interoperability
- 100
- Improvement activities
- 40
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 036-124964 | IL | MD | Radiation Oncology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Uropartners LLC | Radiation Oncology | Current | Accepting new patients |
| Radiation Oncology Consultants, LTD | Radiation Oncology | Current | Accepting new patients |
| Uropartners, LLC | Current | Accepting new patients | |
| Precision Radiation Medicine LLC | Radiation Oncology | Current | Accepting new patients |
| Uropartners, LLC | Current | Accepting new patients | |
| Bonaventure Medical Foundation, LLC | Past | Accepting new patients |
Locations
27750 W State Route 22
Ste G50
Barrington, IL 60010
Phone (847) 842-0300
900 W Nelson St
Chicago, IL 60657
Phone (773) 296-7089
3815 Highland Ave
Downers Grove, IL 60515
Phone (630) 275-5900
800 Biesterfield Rd
Ste 110
Elk Grove Vlg, IL 60007
Phone (847) 981-3576
2600 Patriot Blvd
Ste J
Glenview, IL 60026
Phone (224) 260-3100
1555 N Barrington Rd
Ste 1400
Hoffman Estates, IL 60169
Phone (847) 755-3273
660 N Westmoreland Rd
#302
Lake Forest, IL 60045
801 S Milwaukee Ave
Libertyville, IL 60048
Phone (847) 362-2900
801 S Milwaukee Ave
#880
Libertyville, IL 60048
Phone (847) 990-5910
700 Commerce Dr
Ste 500
Oak Brook, IL 60523
Phone (847) 698-0600
1700 Luther Ln
Park Ridge, IL 60068
Phone (847) 268-8200
1700 Luther Ln
Ste 1110
Park Ridge, IL 60068
Phone (630) 402-1463
2225 Enterprise Dr
Ste 2511
Westchester, IL 60154
Phone (708) 486-0076
2245 Enterprise Dr
Ste 4506
Westchester, IL 60154
Organizations & group practices 6
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.
-
- Radiation Oncology Physician
- Oak Brook, IL
- NPI 1164412417
-
dba Precision Radiation Medicine
- Radiation Oncology Physician
- Niles, IL
- NPI 1578440996
-
- Urology Physician
- Wheaton, IL
- NPI 1396790168
-
- Durable Medical Equipment & Medical Supplies
- Geneva, IL
- NPI 1659124683
-
dba Alexian Brothers Medical Foundation
- Family Medicine Physician
- Elk Grove Village, IL
- NPI 1588775647
Hospital & facility affiliations 2
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Elk Grove Village, IL
- NPI 1265577191
-
- General Acute Care Hospital
- Hoffman Estates, IL
- NPI 1376644385
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1167264000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1779062400000",
"number": "1982760773",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "700 COMMERCE DR",
"address_2": "SUITE 500",
"city": "OAK BROOK",
"state": "IL",
"postal_code": "605231546",
"telephone_number": "847-698-0600",
"fax_number": "847-698-0601"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "800 BIESTERFIELD RD",
"address_2": "SUITE 110",
"city": "ELK GROVE VILLAGE",
"state": "IL",
"postal_code": "600073361",
"telephone_number": "847-981-5760",
"fax_number": "847-956-5138"
}
],
"practiceLocations": [
{
"address_1": "1700 Luther Ln",
"address_purpose": "LOCATION",
"city": "Park Ridge",
"state": "IL",
"postal_code": "600681270",
"country_code": "US",
"telephone_number": "847-723-8030",
"country_name": "United States",
"address_type": "DOM"
},
{
"address_1": "2600 Patriot Blvd Ste J",
"address_purpose": "LOCATION",
"city": "Glenview",
"state": "IL",
"postal_code": "600268024",
"country_code": "US",
"telephone_number": "224-260-3100",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "RAJENDRAN",
"first_name": "RAMJI",
"middle_name": "RAMASWAMY",
"name_prefix": "Dr.",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-12-28",
"last_updated": "2026-05-18",
"certification_date": "2026-05-18",
"status": "A"
},
"taxonomies": [
{
"code": "2085R0001X",
"taxonomy_group": "",
"desc": "Radiology, Radiation Oncology",
"state": "IL",
"license": "036-124964",
"primary": true
}
],
"identifiers": [
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "MEDICARE PTAN",
"identifier": "778401002",
"state": "IL"
},
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "036124964",
"state": "IL"
},
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "MEDICARE PTAN",
"identifier": "558620004",
"state": "IL"
}
],
"endpoints": [
{
"endpointType": "DIRECT",
"endpointTypeDescription": "Direct Messaging Address",
"endpoint": "rrajendran236415@direct.myadvocateaurora.org",
"affiliation": "N",
"use": "DIRECT",
"useDescription": "Direct",
"address_1": "1700 Luther Ln",
"city": "Park Ridge",
"state": "IL",
"country_code": "US",
"postal_code": "600681270",
"country_name": "United States",
"address_type": "DOM"
},
{
"endpointType": "FHIR",
"endpointTypeDescription": "FHIR URL",
"endpoint": "https://epicfhir.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/",
"affiliation": "N",
"address_1": "1700 Luther Ln",
"city": "Park Ridge",
"state": "IL",
"country_code": "US",
"postal_code": "600681270",
"country_name": "United States",
"address_type": "DOM"
}
],
"other_names": []
}
Other providers in Elk Grove Village, IL
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 18, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.