CHARLES ABREU MD
NPI 1942837323
Hospitalist in Riverside, CA
About Charles Abreu Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CHARLES ABREU MD (NPI 1942837323) is an individual hospitalist provider in Riverside, California, licensed in Ohio (35.147514) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS, is affiliated with Grant Medical Center, and maintains a secondary practice location in Columbus.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
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
Charles Abreu 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
2Medicare enrollment records show Charles Abreu reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Riverside, CA 92505
- Reassigned Medicare billing, California enrollment
- 114 clinicians in this Medicare group
Columbus, OH 43214
- Reassigned Medicare billing, Ohio enrollment
- 3,314 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.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Grant Medical Center
Acute Care Hospitals · Columbus, OHDoctors Hospital
Acute Care Hospitals · Columbus, OHDublin Methodist Hospital
Acute Care Hospitals · Dublin, OHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92505 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
RIVERSIDE, CA 92505
RIVERSIDE, CA 92505
RIVERSIDE, CA 92505
RIVERSIDE, CA 92505
RIVERSIDE, CA 92505
RIVERSIDE, CA 92505
RIVERSIDE, CA 92505
RIVERSIDE, CA 92505
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 Charles Abreu's NPI number?
The NPI number for Charles Abreu is 1942837323. It was assigned to this individual provider in the NPPES registry on March 25, 2020.
Where is Charles Abreu located?
Charles Abreu practices at 4234 Riverwalk Pkwy Ste 230, Riverside, CA 92505. The listed phone number is (951) 781-3672.
What is Charles Abreu's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Charles Abreu enrolled in Medicare?
Yes. Charles Abreu 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 Charles Abreu's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Charles Abreu reassigns Medicare benefits to 2 organizations: El-Bershawi Medical Corp (Riverside, CA) and Ohiohealth Corporation (Columbus, OH). 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 Charles Abreu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Charles Abreu affiliated with any hospitals?
According to CMS data, Charles Abreu is affiliated with Grant Medical Center, Doctors Hospital and Dublin Methodist Hospital.
When was this NPI record last updated?
The NPPES record for Charles Abreu was last updated on September 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 60 days 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.
# Charles Abreu, MD · NPI 1942837323
Hospitalist physician in Riverside, California. Individual provider, active in the CMS NPPES registry since March 25, 2020.
## Identity
- **NPI:** 1942837323 (Entity type: Individual)
- **Enumerated:** March 25, 2020
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 35.147514 (Ohio)
- **Sole proprietor:** No
## Practice location
- **Address:** 4234 RIVERWALK PKWY STE 230, Riverside, CA 92505-3312
- **Phone:** (951) 781-3672 · **Fax:** (951) 781-0365
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): El-Bershawi Medical Corp (NPI 1386813103, Riverside, CA); Ohiohealth Corporation (NPI 1578545273, Columbus, OH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loma Linda University School Of Medicine, class of 2020
## Record status
- **NPPES last updated:** September 3, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1942837323) · Data from the CMS NPPES public registry.