Alexander Black, MD
NPI 1104851500 · Hematology & Oncology Physician · Santa Clarita, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Black, MD is a Hematology & Oncology Physician provider in Santa Clarita, CA (NPI 1104851500).
Provider details
- NPI number
- 1104851500
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G58928 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
6,149 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 | 1,388 | $138 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 757 | $8 |
| 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 | 754 | $17 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 567 | $9 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 490 | $17 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 79 | 30 |
| Anastrozole | 72 | 30 |
| Tamoxifen Citrate | 62 | 20 |
| Gabapentin | 53 | 22 |
| Dexamethasone | 46 | 18 |
| Prednisone | 45 | 20 |
| Megestrol Acetate | 44 | 25 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$132 across 3 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 (1)
- 625 S Fair Oaks Ave Ste 320Pasadena, CA 91105-2674Phone: (626) 396-2999Fax: (626) 396-2991
Registry dates
- Enumerated
- 2006-07-12
- Last updated
- 2020-01-07
- Certified
- 2020-01-07
Frequently asked questions
- What is Alexander Black's NPI number?
- Alexander Black's National Provider Identifier (NPI) is 1104851500, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Black's specialty?
- Alexander Black is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Black located?
- Alexander Black's practice location on file with NPPES is 27235 Tourney Rd Ste 2400, Santa Clarita, CA 91355-5905.
- What is Alexander Black's phone number?
- The practice phone number listed in the NPPES registry for Alexander Black is (661) 255-5350.
- Does Alexander Black accept Medicare?
- Alexander Black is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Black's NPI active?
- Yes — Alexander Black's NPI (1104851500) is active in the NPPES registry as of the last update on 2020-01-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.