MUHAMMAD MUSLIM MD
NPI 1861571218
Internal Medicine - Hematology & Oncology in Riverside, CA
About Muhammad Muslim Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MUHAMMAD MUSLIM MD (NPI 1861571218) is an individual hematology & oncology provider in Riverside, California, licensed in California (C192251) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, is affiliated with Hays Medical Center, and maintains a secondary practice location in Hays.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Muhammad Muslim Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Muhammad Muslim reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Downey, CA 90241
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: The Oncology Institute Ca, A Professional Corporation
- 110 clinicians in this Medicare group
Dodge City, KS 67801
- Reassigned Medicare billing, Kansas enrollment
- 218 clinicians in this Medicare group
Eau Claire, WI 54701
- Reassigned Medicare billing, Wisconsin enrollment
- 2,476 clinicians in this Medicare group
Rice Lake, WI 54868
- Reassigned Medicare billing, Wisconsin enrollment
- 1,616 clinicians in this Medicare group
Marshfield, WI 54449
- Reassigned Medicare billing, Wisconsin enrollment
- 2,540 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Hays Medical Center
Acute Care Hospitals · Hays, KSCentura St. Catherine-Dodge City
Acute Care Hospitals · Dodge City, KSGraham County Hospital
Critical Access Hospitals · Hill City, KSRussell Regional Hospital
Critical Access Hospitals · Russell, KSPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92506 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
RIVERSIDE, CA 92506
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Muhammad Muslim's NPI number?
The NPI number for Muhammad Muslim is 1861571218. It was assigned to this individual provider in the NPPES registry on November 6, 2006.
Where is Muhammad Muslim located?
Muhammad Muslim practices at 4646 Brockton Ave Ste 203, Riverside, CA 92506. The listed phone number is (951) 394-7028.
What is Muhammad Muslim's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Muhammad Muslim enrolled in Medicare?
Yes. Muhammad Muslim is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Muhammad Muslim's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Muhammad Muslim reassigns Medicare benefits to 5 organizations: Starling Oncology Ca, A Professional Corporation (Downey, CA), Hays Medical Center, Inc (Dodge City, KS), Mchs Hospitals Inc (Eau Claire, WI), Lakeview Medical Center Inc Of Rice Lake (Rice Lake, WI) and Marshfield Clinic Inc (Marshfield, WI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Muhammad Muslim's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Muhammad Muslim accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Sunflower Health Plan, Ambetter of Oklahoma and Blue Cross and Blue Shield of Kansas, Inc. and 1 other insurer list Muhammad Muslim as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Muhammad Muslim affiliated with any hospitals?
According to CMS data, Muhammad Muslim is affiliated with Hays Medical Center, Centura St. Catherine-Dodge City, Graham County Hospital and Russell Regional Hospital.
When was this NPI record last updated?
The NPPES record for Muhammad Muslim was last updated on November 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Muhammad Muslim, MD · NPI 1861571218
Hematology & Oncology physician in Riverside, California. Individual provider, active in the CMS NPPES registry since November 6, 2006.
## Identity
- **NPI:** 1861571218 (Entity type: Individual)
- **Enumerated:** November 6, 2006
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** C192251 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4646 BROCKTON AVE STE 203, Riverside, CA 92506-0104
- **Phone:** (951) 394-7028 · **Fax:** (951) 224-9899
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Starling Oncology Ca, A Professional Corporation (NPI 1275651515, Downey, CA); Hays Medical Center, Inc (NPI 1902590508, Dodge City, KS); Mchs Hospitals Inc (NPI 1316416035, Eau Claire, WI); Lakeview Medical Center Inc Of Rice Lake (NPI 1093201832, Rice Lake, WI); Marshfield Clinic Inc (NPI 1952347981, Marshfield, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1988
## Record status
- **NPPES last updated:** November 20, 2025
- **Other identifiers:** Medicaid 1861571218 (CA); Medicaid 34202900 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1861571218) · Data from the CMS NPPES public registry.