Medicare Enrolled

Dr. Marwan Nasir, M.D.

Pathology - Anatomic · Houston, TX
Practice pattern: Mixed Practice — Diverse clinical practice across multiple procedure types
921 GESSNER RD, Houston, TX 77024
8324128670
In practice since 2006 (19 years)
NPI: 1962590562 verify on NPPES ↗
High
DATA COVERAGE
Data in 3 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. Nasir 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 →
Are you Dr. Nasir? Request a correction or review of any data shown here. Provider portal →

What this data tells you about Dr. Nasir

Dr. Marwan Nasir is a pathology - anatomic specialist in Houston, TX, with 19 years of NPI registration. Based on federal Medicare data, Dr. Nasir performed 1,689 Medicare services across 867 unique beneficiaries.

The Data Coverage level for Dr. Nasir is High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.

✓ 19 years in practice ▲ Top 28% volume in TX

Medicare Practice Summary

Medicare Utilization ↗
1,689
Medicare services
Top 28% in TX for pathology - anatomic
867
Unique beneficiaries
$28
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~89 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
Tissue pathology examination, moderate complexity 893 $29 $273
Tissue staining for diagnosis, additional 270 $22 $197
Tissue staining for diagnosis, initial 105 $27 $213
Pathology examination of tissue using a microscope, moderately high complexity 73 $65 $505
Cell examination of specimen, concentration technique 54 $18 $142
Pathology examination of tissue using a microscope, moderately low complexity 54 $9 $201
Special stained specimen slides to identify organisms including interpretation and report 46 $21 $132
Pathology examination of specimen during surgery, first tissue block 43 $49 $323
Special stained specimen slides to examine tissue including interpretation and report 29 $10 $89
Preparation of tissue for examination by removing any calcium present 26 $10 $76
Blood smear interpretation by physician with written report 23 $19 $125
Evaluation of fine needle aspirate with interpretation and report 22 $55 $343
Pathology examination of specimen during surgery, each additional tissue block 20 $24 $260
Microscopic genetic analysis of tumor, manual 19 $33 $251
Pathology examination of tissue using a microscope, limited examination 12 $4 $94
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.
3.7% high complexity
0.0% medium
96.3% routine
Looking for a pathology - anatomic specialist in Houston?
Compare pathology - anatomics in the Houston area by procedure volume, costs, and industry payment transparency.
Browse pathology - anatomics nearby

Geographic Context

Pathology - anatomics within 10 mi
326
Per 100K population
6.9
County median income
$73,104
Nearest hospital
MEMORIAL HERMANN MEMORIAL CITY HOSPITAL
0.0 mi

Data Sources

Provider Registry ✓ NPPES Weekly updates
Medicare Enrollment ✓ PECOS Monthly updates
Practice Data ✓ Medicare Util. Annual (CY lag)
Industry Payments — No payments N/A
Disciplinary History — Not public N/A

This provider has data in 3 of 4 available federal datasets, with a Data Coverage level of High. This measures how much public data is available about a provider — not how good they are. How we calculate this →

Summary

Dr. Nasir is a mixed practice specialist, with above-average Medicare volume (top 28% in TX), with 19 years of NPI registration.

This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →

Frequently Asked Questions

Is Dr. Nasir experienced with tissue pathology examination, moderate complexity?
Based on Medicare claims data, Dr. Nasir performed 893 tissue pathology examination, moderate complexity 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.
How do Dr. Nasir's costs compare to other pathology - anatomics in Houston?
Dr. Nasir's average Medicare payment per service is $28. 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 High for Dr. Nasir) 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 →

Explore related providers

Same specialty & city
Pathology - Anatomics in Houston
Browse pathology - anatomics in Houston ranked by procedure volume and transparency data.
Highest volume
Top Pathology - Anatomics in TX
Pathology - anatomics ranked by total Medicare services performed statewide.
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 ↗, 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. The Transparency Score measures 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 →