Sarah Hassan, M.D
NPI 1689935066 · Hematology & Oncology Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sarah Hassan, M.D is a Hematology & Oncology Physician provider in Fountain Valley, CA (NPI 1689935066).
Provider details
- NPI number
- 1689935066
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Female
- Sole proprietor
- No
- License
- A156103 (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
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
668 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) |
|---|---|---|
| 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 | 201 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 195 | $139 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 99 | $16 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 58 | $6 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 35 | $17 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 222 | 86 |
| Folic Acid | 69 | 27 |
| Exemestane | 53 | 19 |
| Letrozole | 43 | 19 |
| Hydroxyurea | 30 | — |
| Apixabanbrand: Eliquis | 29 | — |
| Epoetin Alfabrand: Procrit | 18 | — |
| Rivaroxaban |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$268 across 4 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
Registry dates
- Enumerated
- 2012-06-02
- Last updated
- 2021-05-27
- Certified
- 2021-05-27
Frequently asked questions
- What is Sarah Hassan's NPI number?
- Sarah Hassan's National Provider Identifier (NPI) is 1689935066, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sarah Hassan's specialty?
- Sarah Hassan is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Sarah Hassan located?
- Sarah Hassan's practice location on file with NPPES is 18111 Brookhurst St Ste 6100, Fountain Valley, CA 92708-6728.
- What is Sarah Hassan's phone number?
- The practice phone number listed in the NPPES registry for Sarah Hassan is (714) 378-7330.
- Does Sarah Hassan accept Medicare?
- Sarah Hassan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sarah Hassan's NPI active?
- Yes — Sarah Hassan's NPI (1689935066) is active in the NPPES registry as of the last update on 2021-05-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.