Active NPI
Muhammad Muslim, MD
- Hematology & Oncology Physician
- Riverside, CA
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Hematology & Oncology Physician
- License
- C192251
- Practice address
- 4646 Brockton Ave Ste 203
Riverside, CA 92506-0104 - Phone
- (951) 394-7028
- Fax
- (951) 224-9899
- NPI assigned
- Nov 6, 2006
- 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 3
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Hematology & Oncology Physician | 207RH0003X | 44404 | WI | |
| Hematology & Oncology Physician | 207RH0003X | C192251 | CA | Primary |
| Hematology & Oncology Physician | 207RH0003X | 0452015 | KS |
Addresses
Primary practice location
4646 Brockton Ave Ste 203
Riverside, CA 92506-0104
Mailing address
18000 Studebaker Rd Ste 800
Cerritos, CA 90703-2671
Phone (562) 735-3226
Other practice location 1
2220 Canterbury Dr Ste 150
Hays, KS 67601-2370
Phone (785) 623-5774
Other identifiers 2
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1861571218 | Medicaid | CA | |
| 34202900 | Medicaid | WI |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in WI, CA, KS
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 3
Care Compare profile
Medicare Care Compare- Specialty
- Hematology/Oncology
- Education
- Other, 1988
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
2220 Canterbury Dr
Suite 150
Hays, KS 67601-2370
Phone (785) 623-5774
4646 Brockton Ave
Suite 203
Riverside, CA 92506-0104
Phone (951) 394-7028
Hospital & facility affiliations
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| C192251 | CA | MD | Hematology & Oncology Physician |
| 0452015 | KS | MD | Hematology & Oncology Physician |
| 44404 | WI | MD | Hematology & Oncology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| MCHS Hospitals Inc | Current | Accepting new patients | |
| Hays Medical Center, Inc | Current | Accepting new patients | |
| Marshfield Clinic Inc | Current | Accepting new patients | |
| MCHS Hospitals Inc | Current | Accepting new patients | |
| The Oncology Institute Ca, a Professional Corporation | Hematology & Oncology | Current | Accepting new patients |
| Lakeview Medical Center Inc of Rice Lake | Current | Accepting new patients | |
| Hays Medical Center, Inc. | Hematology & Oncology | Current | Accepting new patients |
| Starling Oncology Ca, a Professional Corporation | Hematology & Oncology | Current | Accepting new patients |
| MCHS Hospitals Inc | Current | Accepting new patients | |
| Pawnee Valley Community Hospital Inc | Past | Accepting new patients |
Locations
18000 Studebaker Rd
Ste 800
Cerritos, CA 90703
900 S Main St
Ste 204
Corona, CA 92882
Phone (951) 372-2400
11100 Warner Ave
Ste 214
Fountain Vly, CA 92708
Phone (714) 594-7820
6121 N Thesta St
Ste 204
Fresno, CA 93710
Phone (559) 435-2425
3300 E South St
Ste 304
Lakewood, CA 90805
Phone (562) 232-0550
4646 Brockton Ave
Ste 203
Riverside, CA 92506
Phone (951) 394-7028
399 E Highland Ave
Ste 501
Sn Bernrdno, CA 92404
Phone (909) 982-4252
425 Haaland Dr
Ste 103
Thousand Oaks, CA 91361
Phone (805) 345-2020
2067 W Vista Way
Ste 295
Vista, CA 92083
Phone (526) 735-3226
2220 Canterbury Dr
Ste 150
Hays, KS 67601
Phone (785) 623-5774
2220 Canterbury Dr
Hays, KS 67601
Phone (785) 623-5000
2655 County Highway I
Chippewa Fls, WI 54729
Phone (715) 723-8827
900 W Clairemont Ave
Eau Claire, WI 54701
Phone (715) 717-4121
1000 Starr Ave
Eau Claire, WI 54703
Phone (715) 858-4850
3501 Golf Rd
Eau Claire, WI 54701
Phone (715) 858-4200
1000 N Oak Ave
Marshfield, WI 54449
Phone (715) 387-5111
1700 W Stout St
Rice Lake, WI 54868
Phone (715) 236-6133
1020 Lakeshore Dr
Rice Lake, WI 54868
Phone (715) 236-8100
Interoperability endpoints
- muhammad.muslim@theoncologyinstitute.ikm.direct-ci.com
- muhammad.muslim@marshfieldclinichealthsystem.cernerdirect.com
Organizations & group practices 11
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.
-
dba The Oncology Institute of Hope and Innovation
- Hematology & Oncology Physician
- Downey, CA
- NPI 1275651515
-
dba Hays Medical Group - DeBakey Heart Institute
- Interventional Cardiology Physician
- Hays, KS
- NPI 1770618258
-
dba Marshfield Medical Center - Rice Lake Professional Services
- Clinic/Center
- Rice Lake, WI
- NPI 1093201832
-
dba Marshfield Clinic Florida Teleradiology/Telehealth
- Clinic/Center
- Marshfield, WI
- NPI 1952347981
-
dba HaysMed Pathology
- Anatomic Pathology & Clinical Pathology Physician
- Hays, KS
- NPI 1073306221
-
dba Hays Medical Group
- Internal Medicine Physician
- Hays, KS
- NPI 1871567479
Hematology & Oncology
-
dba Marshfield Medical Center Eau Claire Professional Services
- Clinic/Center
- Eau Claire, WI
- NPI 1316416035
-
dba Marshfield Medical Center - Eau Claire Cancer Center
- Durable Medical Equipment & Medical Supplies
- Eau Claire, WI
- NPI 1558230847
-
dba Starling Oncology
- Hematology & Oncology Physician
- Las Vegas, NV
- NPI 1225514508
-
dba Pawnee Valley Community Hospital Family Medicine
- General Practice Physician
- Larned, KS
- NPI 1912310822
Hospital & facility affiliations 4
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
dba St. Catherine Hospital - Dodge City
- General Acute Care Hospital
- Dodge City, KS
- NPI 1689317190
-
- Critical Access Hospital
- Hill City, KS
- NPI 1588673297
-
- General Acute Care Hospital
- Hays, KS
- NPI 1881697043
-
dba Russell Regional Hospital
- General Acute Care Hospital
- Russell, KS
- NPI 1417939729
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1162771200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1763596800000",
"number": "1861571218",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "18000 STUDEBAKER RD STE 800",
"city": "CERRITOS",
"state": "CA",
"postal_code": "907032671",
"telephone_number": "562-735-3226",
"fax_number": "562-381-9685"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "4646 BROCKTON AVE STE 203",
"city": "RIVERSIDE",
"state": "CA",
"postal_code": "925060104",
"telephone_number": "951-394-7028",
"fax_number": "951-224-9899"
}
],
"practiceLocations": [
{
"address_1": "2220 Canterbury Dr Ste 150",
"address_purpose": "LOCATION",
"city": "Hays",
"state": "KS",
"postal_code": "676012370",
"country_code": "US",
"telephone_number": "785-623-5774",
"fax_number": "785-623-5775",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "MUSLIM",
"first_name": "MUHAMMAD",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-11-06",
"last_updated": "2025-11-20",
"certification_date": "2025-11-20",
"status": "A"
},
"taxonomies": [
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "WI",
"license": "44404",
"primary": false
},
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "CA",
"license": "C192251",
"primary": true
},
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "KS",
"license": "0452015",
"primary": false
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "1861571218",
"state": "CA"
},
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "34202900",
"state": "WI"
}
],
"endpoints": [],
"other_names": []
}
Other providers in Riverside, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 20, 2025; 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.