Dr. Ronald Drengler, M.D.
What this data tells you about Dr. Drengler
Dr. Ronald Drengler is a medical oncology specialist in San Antonio, TX, with 20 years of NPI registration. Based on federal Medicare data, Dr. Drengler performed 223,535 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Drengler received a total of $7,743 from 69 pharmaceutical and/or device companies across 370 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. Drengler 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 |
|---|---|---|---|
| Oxaliplatin chemotherapy injection This procedure involves the administration of oxaliplatin, a chemotherapy medication, via injection. The dosage specified is 0.5 mg. |
52,550 | $0 | $5 |
| Nivolumab injection (Opdivo) | 48,240 | $23 | $91 |
| Iron infusion (Injectafer) An intravenous injection of ferric carboxymaltose, an iron replacement medication. |
47,700 | $1 | $3 |
| Pembrolizumab injection (Keytruda) | 21,000 | $43 | $165 |
| Eflapegrastim injection, 0.1 mg An injection of eflapegrastim-xnst administered at a dose of 0.1 mg. |
8,580 | $25 | $95 |
| Denosumab injection (Prolia/Xgeva) | 6,900 | $18 | $71 |
| Injection, ipilimumab, 1 mg | 6,770 | $127 | $217 |
| Injection, atropine sulfate, 0.01 mg | 4,080 | $0 | $1 |
| 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. |
2,760 | $6 | $24 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
2,716 | $0 | $0 |
| Injection, leucovorin calcium, per 50 mg | 1,716 | $3 | $13 |
| Fluorouracil injection, 500 mg Administration of a 500 mg dose of fluorouracil medication via injection. |
1,426 | $2 | $7 |
| 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. |
1,368 | $6 | $18 |
| Injection, irinotecan, 20 mg | 1,316 | $2 | $37 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
1,233 | $10 | $32 |
| Epoetin alfa injection (Procrit) for anemia An injection of epoetin alfa containing 1000 units for use in patients not on end-stage renal disease (ESRD) dialysis. |
1,200 | $6 | $21 |
| 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. |
1,118 | $8 | $23 |
| Pegfilgrastim injection, 0.5 mg An injection of pegfilgrastim, a medication that stimulates the production of white blood cells. This specific code applies to the brand-name drug and excludes biosimilar versions. |
876 | $92 | $645 |
| 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. |
762 | $22 | $86 |
| Anti-nausea injection (ondansetron/Zofran) | 760 | $0 | $2 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
734 | $8 | $14 |
| Injection, potassium chloride, per 2 meq | 715 | $0 | $0 |
| 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. |
665 | $97 | $373 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
660 | $99 | $377 |
| Magnesium sulfate injection, per 500 mg An injection of magnesium sulfate administered in 500 mg increments. |
498 | $1 | $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. |
456 | $11 | $47 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
453 | $7 | $20 |
| Injection, gemcitabine hydrochloride, not otherwise specified, 200 mg | 375 | $3 | $46 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
344 | $12 | $58 |
| 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. |
335 | $49 | $205 |
| 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. |
319 | $19 | $57 |
| CA 19-9 tumor antigen test A blood test that measures the level of CA 19-9, a substance that can be found in the blood of some people with cancer. This quantitative analysis detects and measures the specific tumor antigen. |
317 | $20 | $62 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
307 | $21 | $90 |
| Injection, fosnetupitant 235 mg and palonosetron 0.25 mg | 220 | $337 | $1,315 |
| 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. |
217 | $66 | $263 |
| 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. |
198 | $48 | $185 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
195 | $9 | $27 |
| 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. |
194 | $16 | $51 |
| 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. |
192 | $131 | $523 |
| 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. |
192 | $2 | $19 |
| 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. |
184 | $126 | $419 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
150 | $1 | $3 |
| Amylase enzyme level test A blood test that measures the amount of amylase, an enzyme produced by the pancreas and salivary glands, to help evaluate pancreatic health. |
148 | $6 | $19 |
| Lipase level test A blood test that measures the amount of lipase, a fat-digesting enzyme, in your body. |
148 | $7 | $21 |
| Complete blood count (CBC), automated An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood. |
143 | $6 | $19 |
| Intravenous hydration infusion, 31-60 minutes Administration of fluids into a vein to maintain hydration. This procedure involves an infusion lasting between 31 and 60 minutes. |
137 | $25 | $137 |
| Additional hour of intravenous infusion This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis. |
129 | $16 | $60 |
| Immunologic analysis for detection of tumor antigen, quantitative; ca 125 | 120 | $20 | $62 |
| Concurrent intravenous infusion Administration of medication or fluid into a vein for therapy, prevention, or diagnosis while another infusion is being given. |
115 | $15 | $58 |
| Iron level test | 113 | $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. |
113 | $9 | $26 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
111 | $13 | $41 |
| 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. |
98 | $10 | $42 |
| 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. |
85 | $19 | $73 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
85 | $1 | $2 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
80 | $59 | $232 |
| Immunologic analysis for detection of tumor antigen, quantitative; ca 15-3 | 79 | $20 | $62 |
| Urinalysis, manual A manual laboratory examination of a urine sample to check for various substances and cells. |
78 | $3 | $10 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
76 | $15 | $45 |
| Automated red blood cell count An automated laboratory test that measures the number of red blood cells in a blood sample. |
75 | $4 | $12 |
| Cardiac enzyme level (CK-MB) test A blood test that measures the total level of creatine kinase, specifically the cardiac enzyme fraction, to help evaluate heart muscle damage. |
69 | $6 | $20 |
| On-body injector for subcutaneous injection A device is applied to the skin to automatically deliver a medication injection under the skin. |
69 | $14 | $54 |
| 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. |
67 | $43 | $160 |
| Troponin blood test A blood test that measures the amount of troponin protein in your body. Troponin is released into the blood when heart muscle is damaged. |
47 | $12 | $37 |
| New patient office visit, complex (60-74 min) | 47 | $172 | $651 |
| Methylprednisolone injection, up to 125 mg An injection of methylprednisolone sodium succinate, a corticosteroid medication, with a dosage of up to 125 mg. |
46 | $4 | $16 |
| 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. |
41 | $5 | $14 |
| PSA test (prostate cancer screening) | 39 | $18 | $55 |
| Immunoglobulin level test A blood test that measures the level of gammaglobulins, which are immune system proteins. |
36 | $9 | $28 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
35 | $16 | $50 |
| 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 | $93 | $349 |
| 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. |
16 | $4 | $14 |
| 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. |
16 | $4 | $13 |
| Hepatitis B surface antigen test A blood test that uses an immunoassay technique to detect the presence of the hepatitis B surface antigen. This test identifies whether the hepatitis B virus is currently present in the body. |
15 | $10 | $31 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
14 | $27 | $131 |
| Total T3 thyroid hormone test A blood test that measures the total amount of triiodothyronine (T3) hormone in your body. T3 is a thyroid hormone that helps regulate metabolism and energy levels. |
13 | $14 | $43 |
| Hepatitis B core antibody test A blood test that measures the level of antibodies to the hepatitis B core antigen. This test helps determine if a person has been infected with the hepatitis B virus. |
13 | $12 | $36 |
| 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. |
11 | $130 | $529 |
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. Drengler is a mixed practice specialist, with above-average Medicare volume (top 2% in TX), with 20 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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