Dr. Marian Hendricks, D.O.
What this data tells you about Dr. Hendricks
Dr. Marian Hendricks is an emergency medicine specialist in Corpus Christi, TX, with 20 years of NPI registration. Based on federal Medicare data, Dr. Hendricks performed 2,073 Medicare services across 1,470 unique beneficiaries.
Between the years covered by Open Payments, Dr. Hendricks received a total of $1,038 from 21 pharmaceutical and/or device companies across 85 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in emergency medicine. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Hendricks is Very 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.
Medicare Practice Summary
Medicare Utilization ↗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 |
|---|---|---|---|
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
347 | $77 | $289 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
242 | $8 | $21 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
192 | $10 | $37 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
191 | $8 | $27 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
177 | $16 | $59 |
| Urinalysis with microscopic exam A urine test performed manually that includes examining the sample under a microscope to check for abnormalities. |
131 | $3 | $12 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
131 | $10 | $34 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
119 | $126 | $295 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
113 | $13 | $46 |
| Urine microalbumin test (kidney screening) A laboratory test that measures the amount of microalbumin, a small protein, in a urine sample. This test is used to detect early signs of kidney damage. |
100 | $6 | $20 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
78 | $51 | $204 |
| Urine culture, bacterial colony count A laboratory test that measures the number of bacteria growing in a urine sample to help identify infections. |
56 | $8 | $28 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
38 | $9 | $32 |
| Bacterial culture, aerobic A laboratory test that grows and identifies bacteria capable of surviving in oxygen. The results help determine the presence of specific aerobic microorganisms. |
29 | $8 | $28 |
| Antibiotic sensitivity test A laboratory test that determines which antibiotics, antifungals, or antivirals are effective against a specific microorganism using microdilution or agar dilution methods. |
29 | $8 | $30 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
22 | $15 | $53 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
19 | $29 | $103 |
| Free T3 thyroid hormone test A blood test that measures the level of free triiodothyronine (T3) hormone in your body. This helps assess how well your thyroid gland is functioning. |
19 | $17 | $59 |
| Basic metabolic blood panel A blood test that measures a group of basic chemicals, including total calcium levels. |
16 | $8 | $29 |
| Stool test for hidden blood (FIT) A laboratory test that analyzes a stool sample to detect hidden blood using an immunoassay method. |
12 | $16 | $56 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
12 | $14 | $51 |
Industry Payment Transparency
Open Payments through 2019 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2019)
Associated products mentioned in payments ›
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
4.9 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 2019 |
| 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 measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Hendricks is a clinical cardiology specialist, with above-average Medicare volume (top 1% in TX), with low-engagement industry engagement in the top 11% of TX peers, with 20 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
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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. 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.
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