Marissa Zobrist, M.D.
NPI 1033407382 · Emergency Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Zobrist, M.D. is a Emergency Medicine Physician provider in Los Angeles, CA (NPI 1033407382).
Provider details
- NPI number
- 1033407382
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,099 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 559 | $8 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 315 | $176 |
| Critical Care, First 30-74 Minutes99291 | 108 | $217 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 50 | $122 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 22 | $96 |
| Amplifed Dna Or Rna Probe Detection of Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19) Antigen87635 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 37 | 37 |
| Prednisone | 18 | 18 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 14 | 14 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 11 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-07-20
- Last updated
- 2016-05-26
Frequently asked questions
- What is Marissa Zobrist's NPI number?
- Marissa Zobrist's National Provider Identifier (NPI) is 1033407382, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Zobrist's specialty?
- Marissa Zobrist is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marissa Zobrist located?
- Marissa Zobrist's practice location on file with NPPES is 1200 N State St Rm 1060h, Los Angeles, CA 90033-1029.
- What is Marissa Zobrist's phone number?
- The practice phone number listed in the NPPES registry for Marissa Zobrist is (323) 226-2622.
- Does Marissa Zobrist accept Medicare?
- Marissa Zobrist is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Zobrist's NPI active?
- Yes — Marissa Zobrist's NPI (1033407382) is active in the NPPES registry as of the last update on 2016-05-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.