Mosen Istwani, MD - Medicare Internal Medicine in Riverside, CA

Mosen Istwani, MD is a medicare enrolled "Internal Medicine - Nephrology" physician in Riverside, California. He graduated from medical school in 1990 and has 34 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Riverside Nephrology Physicians Inc and his current practice location is 3595 Van Buren Blvd, Suite 203, Riverside, California. You can reach out to his office (for appointments etc.) via phone at (951) 343-1978.

Mosen Istwani is licensed to practice in California (license number A64871) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1043229453.

Contact Information

Mosen Istwani, MD
3595 Van Buren Blvd, Suite 203,
Riverside, CA 92503-0311
(951) 343-1978
(951) 343-1922

Map and Direction




Physician's Profile

Full NameMosen Istwani
GenderMale
SpecialityInternal Medicine
Experience34 Years
Location3595 Van Buren Blvd, Riverside, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Mosen Istwani graduated from medical school in 1990
  NPI Data:
  • NPI Number: 1043229453
  • Provider Enumeration Date: 08/05/2006
  • Last Update Date: 03/21/2013
  Medicare PECOS Information:
  • PECOS PAC ID: 8527119163
  • Enrollment ID: I20090622000653

Medical Identifiers

Medical identifiers for Mosen Istwani such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1043229453NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RN0300XInternal Medicine - Nephrology A64871 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Riverside Community HospitalRiverside, CAHospital
Parkview Community Hospital Medical CenterRiverside, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Riverside Nephrology Physicians Inc93352711473

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Mosen Istwani allows following entities to bill medicare on his behalf.
Entity NameMohammed Khan Md Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1467643544
PECOS PAC ID: 5698865095
Enrollment ID: O20071222000048
Entity NameRiverside Nephrology Physicians Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1144546326
PECOS PAC ID: 9335271147
Enrollment ID: O20100714000591
Entity NameRegents Of The University Of California
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1811255060
PECOS PAC ID: 8527223304
Enrollment ID: O20120628000360

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Mosen Istwani is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Mosen Istwani, MD
3595 Van Buren Blvd, Suite 203,
Riverside, CA 92503-0311

Ph: (951) 343-1978
Mosen Istwani, MD
3595 Van Buren Blvd, Suite 203,
Riverside, CA 92503-0311

Ph: (951) 343-1978

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.