Charles Abreu, MD
NPI 1942837323 · Hospitalist Physician · Riverside, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Abreu, MD is a Hospitalist Physician provider in Riverside, CA (NPI 1942837323).
Provider details
- NPI number
- 1942837323
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 30 | 14 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 26 | — |
| Budesonide/Glycopyr/Formoterolbrand: Breztri Aerosphere | 19 | — |
| Roflumilast | 13 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 5100 W Broad StColumbus, OH 43228-1607Phone: (614) 544-4691Fax: (614) 544-0052
Registry dates
- Enumerated
- 2020-03-25
- Last updated
- 2026-05-16
- Certified
- 2026-05-16
Frequently asked questions
- What is Charles Abreu's NPI number?
- Charles Abreu's National Provider Identifier (NPI) is 1942837323, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Abreu's specialty?
- Charles Abreu is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Abreu located?
- Charles Abreu's practice location on file with NPPES is 4234 Riverwalk Pkwy Ste 230, Riverside, CA 92505-3312.
- What is Charles Abreu's phone number?
- The practice phone number listed in the NPPES registry for Charles Abreu is (951) 781-3672.
- Does Charles Abreu accept Medicare?
- Charles Abreu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Abreu's NPI active?
- Yes — Charles Abreu's NPI (1942837323) is active in the NPPES registry as of the last update on 2026-05-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.