Mark Haas, M.D.
NPI 1750330478 · Anatomic Pathology & Clinical Pathology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Haas, M.D. is a Anatomic Pathology & Clinical Pathology Physician provider in Los Angeles, CA (NPI 1750330478).
Provider details
- NPI number
- 1750330478
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D55055 (MD)
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
20 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
1,992 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) |
|---|---|---|
| Antibody Evaluation, Each Additional Single Antibody Stain Procedure88350 | 1,115 | $30 |
| Special Stained Specimen Slides to Examine Tissue Including Interpretation and Report88313 | 420 | $12 |
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 154 | $39 |
| Antibody Evaluation, Initial Single Antibody Stain Procedure88346 | 132 | $37 |
| Electron Microscopy for Diagnosis88348 | 113 | $80 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 39 | $36 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$49,521 across 24 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
- 2006-05-09
- Last updated
- 2009-09-24
Frequently asked questions
- What is Mark Haas's NPI number?
- Mark Haas's National Provider Identifier (NPI) is 1750330478, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Haas's specialty?
- Mark Haas is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Haas located?
- Mark Haas's practice location on file with NPPES is 8700 Beverly Blvd, Los Angeles, CA 90048-1804.
- What is Mark Haas's phone number?
- The practice phone number listed in the NPPES registry for Mark Haas is (818) 338-8103.
- Does Mark Haas accept Medicare?
- Mark Haas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Haas's NPI active?
- Yes — Mark Haas's NPI (1750330478) is active in the NPPES registry as of the last update on 2009-09-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.