Hayssam Hajar, MD
NPI 1043398761 · Hospitalist Physician · Roseville, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hayssam Hajar, MD is a Hospitalist Physician provider in Roseville, CA (NPI 1043398761).
Provider details
- NPI number
- 1043398761
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A72586 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 40 | 40 |
| Prednisone | 37 | 36 |
| Torsemide | 25 | 24 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 20 | 19 |
| Oxycodone Hcl | 19 | 19 |
| Doxycycline Hyclate | 17 | 17 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2021-12-22
Frequently asked questions
- What is Hayssam Hajar's NPI number?
- Hayssam Hajar's National Provider Identifier (NPI) is 1043398761, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hayssam Hajar's specialty?
- Hayssam Hajar is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Hayssam Hajar located?
- Hayssam Hajar's practice location on file with NPPES is 1600 Eureka Rd, Roseville, CA 95661-3027.
- What is Hayssam Hajar's phone number?
- The practice phone number listed in the NPPES registry for Hayssam Hajar is (916) 784-4000.
- Does Hayssam Hajar accept Medicare?
- Hayssam Hajar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hayssam Hajar's NPI active?
- Yes — Hayssam Hajar's NPI (1043398761) is active in the NPPES registry as of the last update on 2021-12-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.