Dr. Mark Jennings, MD
What this data tells you about Dr. Jennings
Dr. Mark Jennings is a student in an organized health care education/training program specialist in Allen, TX, with 17 years of NPI registration. Based on federal Medicare data, Dr. Jennings performed 138,192 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Jennings received a total of $3,539 from 46 pharmaceutical and/or device companies across 190 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Jennings 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.
Medicare Practice Summary — 2023
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 |
|---|---|---|---|
| Nivolumab injection (Opdivo) | 15,820 | $24 | $64 |
| Contrast dye for imaging (iodine-based) A contrast agent containing 300-399 mg/ml of iodine used to enhance imaging studies. It is administered per milliliter to improve the visibility of internal structures. |
15,025 | $0 | $1 |
| Iron infusion (Injectafer) An intravenous injection of ferric carboxymaltose, an iron replacement medication. |
15,000 | $1 | $3 |
| Paclitaxel chemotherapy injection | 12,963 | $0 | $2 |
| Pembrolizumab injection (Keytruda) | 11,800 | $43 | $114 |
| Injection, granisetron, extended-release, 0.1 mg | 9,600 | $5 | $12 |
| Anti-nausea injection (aprepitant) | 8,060 | $1 | $5 |
| Daratumumab injection (Darzalex) An injection containing daratumumab and hyaluronidase-fihj administered under the skin. |
7,380 | $38 | $110 |
| Oxaliplatin chemotherapy injection This procedure involves the administration of oxaliplatin, a chemotherapy medication, via injection. The dosage specified is 0.5 mg. |
6,400 | $0 | $4 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
3,932 | $0 | $1 |
| Eflapegrastim injection, 0.1 mg An injection of eflapegrastim-xnst administered at a dose of 0.1 mg. |
3,168 | $26 | $88 |
| Injection, docetaxel, 1 mg | 2,200 | $1 | $9 |
| Epoetin alfa injection (Retacrit) for anemia An injection of a biosimilar form of epoetin alfa used for non-end-stage renal disease purposes. The dose administered is 1000 units. |
1,760 | $6 | $28 |
| Bevacizumab-bvzr biosimilar injection, 10 mg An injection of bevacizumab-bvzr, a biosimilar medication, administered in a 10 mg dose. |
1,670 | $26 | $158 |
| Bortezomib injection, 0.1 mg Administration of a 0.1 mg dose of bortezomib medication via injection. |
1,540 | $4 | $116 |
| Bevacizumab-maly biosimilar injection, 10 mg An injection of bevacizumab-maly, a biosimilar medication, with a dosage of 10 mg. |
1,390 | $53 | $181 |
| 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. |
1,268 | $8 | $26 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
1,207 | $10 | $36 |
| Immune globulin infusion (Gammagard) An injection of immune globulin (Gammagard Liquid) to provide antibodies. The dose specified is 500 mg. |
1,090 | $35 | $100 |
| 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. |
978 | $80 | $232 |
| Trastuzumab biosimilar injection, 10 mg An injection of trastuzumab-qyyp, a biosimilar medication, administered in a 10 mg dose. |
960 | $23 | $205 |
| Rituximab-pvvr biosimilar injection, 10 mg An injection of rituximab-pvvr, a biosimilar medication, administered in a 10 mg dose. |
950 | $24 | $185 |
| Lactate dehydrogenase (LDH) level test A blood test that measures the amount of lactate dehydrogenase, an enzyme found in many body tissues. It helps assess tissue damage or disease. |
929 | $6 | $21 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
866 | $7 | $23 |
| Phosphate level test A blood test that measures the amount of phosphate in your body. Phosphate is a mineral that helps keep bones and teeth strong. |
866 | $5 | $16 |
| Uric acid level test A blood test that measures the level of uric acid in your body. Uric acid is a waste product formed when the body breaks down purines. |
864 | $4 | $15 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
804 | $8 | $13 |
| Gadolinium MRI contrast injection Administration of a gadolinium-based contrast agent to enhance magnetic resonance imaging. The dose is measured per milliliter of the agent injected. |
731 | $1 | $6 |
| Additional sequential IV infusion, 1 hour or less This code represents an additional intravenous infusion administered sequentially to a primary infusion. It covers the administration time of one hour or less. |
650 | $20 | $69 |
| Anti-nausea injection (Aloxi/palonosetron) | 620 | $1 | $56 |
| Injection, leucovorin calcium, per 50 mg | 537 | $3 | $15 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
485 | $90 | $300 |
| Injection, fulvestrant, 25 mg | 410 | $9 | $235 |
| Carboplatin chemotherapy injection, 50 mg Administration of a 50 mg dose of carboplatin, a chemotherapy medication, via injection. |
401 | $2 | $43 |
| Fluorouracil injection, 500 mg Administration of a 500 mg dose of fluorouracil medication via injection. |
374 | $2 | $6 |
| Flow cytometry, additional marker An additional marker is tested during a flow cytometry procedure to analyze DNA or cells. This step adds specific data points to the initial analysis. |
361 | $17 | $101 |
| Anti-nausea injection (ondansetron/Zofran) | 304 | $0 | $2 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
280 | $10 | $57 |
| Injection, gemcitabine hydrochloride, not otherwise specified, 200 mg | 224 | $3 | $48 |
| Pegfilgrastim-apgf injection An injection of pegfilgrastim-apgf, a biosimilar medication. The dose specified is 0.5 mg. |
216 | $103 | $843 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
188 | $119 | $320 |
| Cyclophosphamide, 100 mg | 188 | $15 | $105 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
165 | $20 | $65 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
162 | $13 | $46 |
| Iron level test | 162 | $6 | $19 |
| Iron binding capacity test A blood test that measures the amount of iron in the blood and the blood's ability to bind and transport iron. |
162 | $9 | $30 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
149 | $44 | $500 |
| Intravenous infusion of new drug or substance, 1 hour or less This procedure involves administering a new medication or substance directly into a vein through an existing access site. The infusion is completed within one hour or less. |
145 | $45 | $140 |
| 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. |
140 | $51 | $156 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
139 | $1 | $2 |
| Gadopiclenol injection, 1 ml Administration of gadopiclenol, a contrast agent, via injection in a 1 ml dose. |
137 | $9 | $11 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
135 | $566 | $1,803 |
| CT scan of abdomen and pelvis with contrast A CT scan that uses dye to create detailed images of the abdomen and pelvis. This imaging test helps doctors examine internal organs and structures in these areas. |
133 | $150 | $603 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
132 | $16 | $57 |
| Intravenous infusion, 1 hour or less Administration of medication or fluid directly into a vein for therapeutic, preventive, or diagnostic purposes. The procedure lasts one hour or less. |
127 | $43 | $155 |
| Doxorubicin hydrochloride injection, 10 mg This procedure involves the administration of a 10 mg dose of doxorubicin hydrochloride via injection. |
127 | $2 | $7 |
| Non-hormonal chemotherapy injection This procedure involves administering non-hormonal anti-neoplastic chemotherapy medication via injection into the skin or muscle tissue. |
121 | $50 | $166 |
| Zoledronic acid injection, 1 mg An injection of zoledronic acid administered at a dose of 1 mg. |
120 | $7 | $126 |
| Reticulated platelet measurement A blood test that measures the level of young, newly formed platelets in the body. |
103 | $35 | $91 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
93 | $11 | $50 |
| Irrigation of implanted venous access device This procedure involves flushing an implanted venous access device to clear blockages or maintain patency. It ensures the device remains functional for delivering medications or fluids. |
88 | $17 | $55 |
| Blood creatinine level test A blood test that measures the amount of creatinine, a waste product from muscle wear and tear, to help assess kidney function. |
85 | $5 | $17 |
| Carcinoembryonic antigen (CEA) level test A blood test that measures the level of carcinoembryonic antigen (CEA) protein. This test is used to monitor certain types of cancer. |
83 | $19 | $65 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
77 | $110 | $334 |
| Subcutaneous or intramuscular chemotherapy injection This procedure involves administering anti-cancer hormonal medication through an injection into the tissue under the skin or into a muscle. |
68 | $24 | $73 |
| Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries | 67 | $125 | $450 |
| Immunoglobulin level test A blood test that measures the level of gammaglobulins, which are immune system proteins. |
60 | $9 | $32 |
| Normal saline infusion, 1000 cc Administration of 1000 cc of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater solution. |
58 | $2 | $17 |
| Nuclear medicine scan from skull base to mid-thigh with CT A nuclear medicine imaging study covering the area from the base of the skull to the middle of the thighs, performed alongside a CT scan. |
54 | $1,033 | $4,084 |
| Additional hour of intravenous hydration This code represents each additional hour of intravenous fluid administration beyond the initial hour. It is used to bill for extended hydration therapy. |
54 | $8 | $35 |
| Leuprolide acetate (for depot suspension), 7.5 mg | 51 | $137 | $550 |
| Magnesium sulfate injection, per 500 mg An injection of magnesium sulfate administered in 500 mg increments. |
50 | $1 | $4 |
| Intravenous push injection of new drug or substance A healthcare provider injects a new medication or substance directly into a vein using a push technique. |
46 | $39 | $139 |
| Additional hour of intravenous infusion This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis. |
41 | $14 | $45 |
| CT scan of chest, without contrast A computed tomography scan of the chest area that uses X-rays to create detailed images without the use of contrast dye. |
40 | $42 | $409 |
| IV chemotherapy initiation with community continuation Initiation of an intravenous chemotherapy infusion in a clinic using clinic supplies, with continuation of the infusion in a community setting such as home or assisted living. |
37 | $118 | $1,000 |
| New patient office visit, complex (60-74 min) | 34 | $146 | $465 |
| Prothrombin time test (blood clotting) A laboratory test that measures how long it takes for blood to clot. This procedure evaluates the body's coagulation process. |
29 | $4 | $13 |
| MRI of brain with and without contrast An MRI scan of the brain using contrast dye both before and after administration to provide detailed images of brain structures. |
28 | $141 | $1,456 |
| Urine microalbumin test A laboratory test that measures the amount of a specific protein called microalbumin in a urine sample. This analysis helps assess kidney function. |
24 | $6 | $16 |
| Concurrent intravenous infusion Administration of medication or fluid into a vein for therapy, prevention, or diagnosis while another infusion is being given. |
24 | $14 | $47 |
| Automated red blood cell count An automated laboratory test that measures the number of red blood cells in a blood sample. |
21 | $4 | $14 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
20 | $127 | $489 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
19 | $1 | $12 |
| Flow cytometry DNA or cell analysis, first marker A laboratory test that uses a laser to analyze cells or DNA by detecting a specific marker on the cell surface or within the cell. |
18 | $49 | $166 |
| Initial hospital admission, moderate complexity Initial hospital inpatient or observation care for a new patient involving moderate-level medical decision making, with at least 55 minutes total time on the date of the encounter. |
17 | $92 | $331 |
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
17 | $90 | $251 |
| CT scan of abdomen and pelvis, without contrast A computed tomography scan that creates detailed images of the abdominal and pelvic organs. The procedure is performed without the use of intravenous contrast dye. |
16 | $71 | $288 |
| MRI of abdomen with and without contrast An MRI scan of the abdomen using contrast dye before and after administration to create detailed images of internal structures. |
14 | $177 | $1,548 |
| CT guidance for radiation therapy This procedure uses computed tomography imaging to guide the precise placement of radiation therapy fields. It ensures accurate positioning for targeted treatment delivery. |
14 | $87 | $314 |
| Whole body nuclear medicine scan with CT A combined imaging procedure using nuclear medicine and CT scans to visualize the entire body. |
14 | $1,032 | $4,180 |
| Intensity-modulated radiation therapy delivery Delivery of radiation therapy using narrow beams that are spatially and temporally modulated to target specific areas. This process is performed per treatment session. |
13 | $253 | $1,023 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
All-time payments by company (2018-2024) ›
Associated products mentioned in payments ›
Geographic Context
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | 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. Jennings is a mixed practice specialist, with above-average Medicare volume (top 0% in TX), with 17 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
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This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: 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.
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