Medicare Enrolled

Dr. Mark Haas, M.D.

Pathology - Anatomic · Los Angeles, CA
Practice pattern: Mixed Practice — Diverse clinical practice across multiple procedure types
Consulting-driven
8700 BEVERLY BLVD, Los Angeles, CA 90048
8183388103
In practice since 2006 (19 years)
NPI: 1750330478 verify on NPPES ↗
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating. This page presents federal public records about Dr. Haas from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Haas

Dr. Mark Haas is a pathology - anatomic specialist in Los Angeles, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Haas performed 1,481 Medicare services across 490 unique beneficiaries.

Between the years covered by Open Payments, Dr. Haas received a total of $105,260 from 8 pharmaceutical and/or device companies across 58 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in pathology - anatomic. The majority of payments are for consulting, which typically reflects recognized clinical expertise sought by manufacturers. Patients may wish to discuss these relationships with their provider.

The Data Coverage level for Dr. Haas is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.

✓ 19 years in practice ▲ Top 45% volume in CA $105,260 industry payments

Medicare Practice Summary

Medicare Utilization ↗
1,481
Medicare services
Top 45% in CA for pathology - anatomic
490
Unique beneficiaries
$25
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~78 Medicare services per year of practice

Top procedures by volume

Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.

Procedure Volume Avg. paid Avg. submitted
Additional antibody stain test
An additional laboratory test using a single antibody stain to evaluate specific markers.
 837 $25 $117
Special tissue stain and interpretation
A laboratory test using special stains to examine tissue samples, including the pathologist's review and written report of the findings.
 318 $10 $80
Tissue pathology examination, moderate complexity
A laboratory test where a pathologist examines tissue samples under a microscope to analyze cellular details. This intermediate complexity procedure involves specialized techniques to identify abnormalities in the tissue.
 111 $31 $129
Initial single antibody stain evaluation
A laboratory test that uses a single antibody stain to evaluate specific proteins or markers in a sample.
 98 $30 $126
Electron microscopy for diagnosis
A laboratory test that uses an electron microscope to examine tissue or cell samples at a very high magnification for diagnostic purposes.
 88 $66 $259
Tissue staining for diagnosis, initial
A laboratory test where special stains are applied to tissue slides to help examine the cells and identify specific characteristics.
 29 $30 $125
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.

Industry Payment Transparency

Open Payments through 2024 ↗
$105,260
Total received (2018-2024)
Avg $15,037/year across 7 years
Top 3% in CA for pathology - anatomic
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
8
Companies
58
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →

Payment profile

Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.

Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$103,581 (98.4%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$1,679 (1.6%)

Payment trend by year

Annual totals from pharmaceutical and medical device companies.

2024
$49,521
2023
$11,816
2022
$6,000
2021
$116
2020
$9,437
2019
$17,761
2018
$10,610

Payments by company (2024)

Consulting
Speaking
Meals & Travel
Research
AstraZeneca UK Limited
$27,675
Novartis Pharmaceuticals Corporation
$9,274
Otsuka Pharmaceutical Development & Commercialization, Inc.
$8,415
ARGENX US, INC.
$2,612
Travere Therapeutics, Inc.
$1,544
Top 3 companies account for 91.6% of 2024 payments
All-time payments by company (2018-2024) ›
AstraZeneca UK Limited
$38,757
Shire North American Group Inc
$23,033
Novartis Pharmaceuticals Corporation
$12,469
ARGENX US, INC.
$11,875
Otsuka Pharmaceutical Development & Commercialization, Inc.
$8,415
Travere Therapeutics, Inc.
$6,959
NOVARTIS PHARMACEUTICALS CORPORATION
$3,725
180 Medical, Inc.
$26
Top 3 companies account for 70.5% of all-time payments
Associated products mentioned in payments ›
CINRYZE · GENTLECATH · SAPHNELO · VYVGART · VYVGART HYTRULO
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →

The majority of payments (98%) are consulting fees, which typically reflect recognized clinical expertise sought by manufacturers. Total industry engagement is in the top 3% for pathology - anatomic in CA.

Looking for a pathology - anatomic specialist in Los Angeles?
Compare pathology - anatomics in the Los Angeles area by procedure volume, costs, and industry payment transparency.
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Geographic Context

Pathology - anatomics within 10 mi
356
Per 100K population
3.6
County median income
$87,760
Nearest hospital
CEDARS-SINAI MEDICAL CENTER
0.0 mi

Data Sources

Provider Registry ✓ NPPES Weekly updates
Medicare Enrollment ✓ PECOS Monthly updates
Practice Data ✓ Medicare Util. Annual (CY lag)
Industry Payments ✓ Open Payments CY 2024
Disciplinary History — Not public N/A

This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →

Summary

Dr. Haas is a mixed practice specialist, with moderate Medicare volume, with consulting-driven industry engagement in the top 3% of CA peers, with 19 years of NPI registration.

This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →

Frequently Asked Questions

Is Dr. Haas experienced with additional antibody stain test?
Based on Medicare claims data, Dr. Haas performed 837 additional antibody stain test services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Haas receive payments from pharmaceutical companies?
Yes. Dr. Haas received a total of $105,260 from 8 companies across 58 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Haas's costs compare to other pathology - anatomics in Los Angeles?
Dr. Haas's average Medicare payment per service is $25. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Haas) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →

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About this page

All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.

This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.

Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology

Data Disclaimer — Data sourced from the Centers for Medicare & Medicaid Services (CMS): National Plan and Provider Enumeration System (NPPES), Open Payments program, Medicare Provider Utilization and Payment Data, and Provider Enrollment & Certification data (PECOS). Published under the Freedom of Information Act (FOIA). This website is not affiliated with, endorsed by, or authorized by CMS, HHS, or the U.S. Government. Data may contain errors as reported to CMS by providers and reporting entities. Payments from industry are legal and do not indicate wrongdoing. Medicare data reflects only patients aged 65+ or those with qualifying disabilities. For corrections, contact CMS directly. This information does not constitute medical advice and should not be used as the sole basis for choosing a healthcare provider. Procedure descriptions use plain language and do not reference CPT® codes, which are copyrighted by the American Medical Association. Full methodology → · Report a data error → · Privacy policy →