Elizabeth Brem, MD
NPI 1578883781 · Hematology & Oncology Physician · Orange, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elizabeth Brem, MD is a Hematology & Oncology Physician provider in Orange, CA (NPI 1578883781).
Provider details
- NPI number
- 1578883781
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 244302 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
16 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
842 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 193 | $130 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 163 | $159 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 156 | $107 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 116 | $87 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 49 | $73 |
| Telephone Medical Discussion With Physician, 11-20 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lenalidomide | 31 | — |
| Prednisone | 30 | 17 |
| Tramadol Hcl | 28 | — |
| Entecavir | 27 | — |
| Ondansetronbrand: Ondansetron Odt | 27 | 16 |
| Pantoprazole Sodium | 25 | — |
| Venetoclaxbrand: Venclexta | 23 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$46,190 across 51 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
- 2010-06-10
- Last updated
- 2023-04-19
- Certified
- 2023-04-19
Frequently asked questions
- What is Elizabeth Brem's NPI number?
- Elizabeth Brem's National Provider Identifier (NPI) is 1578883781, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elizabeth Brem's specialty?
- Elizabeth Brem is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Elizabeth Brem located?
- Elizabeth Brem's practice location on file with NPPES is 101 the City Dr S Bldg 23, Orange, CA 92868-3201.
- What is Elizabeth Brem's phone number?
- The practice phone number listed in the NPPES registry for Elizabeth Brem is (714) 456-8000.
- Does Elizabeth Brem accept Medicare?
- Elizabeth Brem is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elizabeth Brem's NPI active?
- Yes — Elizabeth Brem's NPI (1578883781) is active in the NPPES registry as of the last update on 2023-04-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.