Erwin Grussie
NPI 1679917561 · Hematology (Internal Medicine) Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erwin Grussie is a Hematology (Internal Medicine) Physician provider in Los Angeles, CA (NPI 1679917561).
Provider details
- NPI number
- 1679917561
- Entity type
- Individual
- Primary specialty
- Hematology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- A138355 (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
13 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
8,298 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 | 1,680 | $139 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 1,578 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 1,557 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 1,515 | $8 |
| Lactate Dehydrogenase (enzyme) Level83615 | 462 | $6 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 428 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 39 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 99 | 22 |
| Anastrozole | 96 | 30 |
| Abiraterone Acetate | 87 | — |
| Prednisone | 83 | 25 |
| Prochlorperazine Maleate | 54 | 31 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 51 | 23 |
| Alendronate Sodium | 49 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$435 across 14 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)
- 181 S Buena Vista StBurbank, CA 91505-4504Phone: (818) 748-4900
Registry dates
- Enumerated
- 2013-04-22
- Last updated
- 2025-10-13
- Certified
- 2025-10-13
Frequently asked questions
- What is Erwin Grussie's NPI number?
- Erwin Grussie's National Provider Identifier (NPI) is 1679917561, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erwin Grussie's specialty?
- Erwin Grussie is listed in the NPPES registry with a primary specialty of Hematology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Erwin Grussie located?
- Erwin Grussie's practice location on file with NPPES is 11800 Wilshire Blvd # 2f, Los Angeles, CA 90025-6602.
- What is Erwin Grussie's phone number?
- The practice phone number listed in the NPPES registry for Erwin Grussie is (310) 231-2121.
- Does Erwin Grussie accept Medicare?
- Erwin Grussie is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erwin Grussie's NPI active?
- Yes — Erwin Grussie's NPI (1679917561) is active in the NPPES registry as of the last update on 2025-10-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.