George Hajjar, MD
NPI 1619978715 · Hematology & Oncology Physician · Santa Clarita, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
George Hajjar, MD is a Hematology & Oncology Physician provider in Santa Clarita, CA (NPI 1619978715).
Provider details
- NPI number
- 1619978715
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- C52459 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,733 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 407 | $139 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 218 | $18 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 207 | $153 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 120 | $18 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 112 | $126 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetron Hcl | 79 | 29 |
| Anastrozole | 54 | 22 |
| Apixabanbrand: Eliquis | 44 | 20 |
| Dexamethasone | 37 | 18 |
| Famotidine | 37 | 14 |
| Hydroxyurea | 30 | — |
| Zanubrutinibbrand: Brukinsa | 29 | — |
| Apalutamidebrand: Erleada |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,287 across 10 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 15031 Rinaldi St Ste 150Mission Hills, CA 91345-1207Phone: (818) 660-4700
- 465 W Putnam AvePorterville, CA 93257-3320Phone: (559) 784-1110
Registry dates
- Enumerated
- 2005-08-10
- Last updated
- 2023-11-27
- Certified
- 2020-10-29
Frequently asked questions
- What is George Hajjar's NPI number?
- George Hajjar's National Provider Identifier (NPI) is 1619978715, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is George Hajjar's specialty?
- George Hajjar is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is George Hajjar located?
- George Hajjar's practice location on file with NPPES is 23823 Valencia Blvd Ste 250, Santa Clarita, CA 91355-9512.
- What is George Hajjar's phone number?
- The practice phone number listed in the NPPES registry for George Hajjar is (661) 799-1999.
- Does George Hajjar accept Medicare?
- George Hajjar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is George Hajjar's NPI active?
- Yes — George Hajjar's NPI (1619978715) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.