Medicare Enrolled
Dr. Alyssa Rieber, M.D.
Hematology & Oncology · Fredericksburg, TX
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Low-engagement
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. Rieber 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. Rieber
Dr. Alyssa Rieber is a hematology & oncology specialist in Fredericksburg, TX, with 19 years of NPI registration. Based on federal Medicare data, Dr. Rieber performed 149,797 Medicare services across 5,307 unique beneficiaries.
Between the years covered by Open Payments, Dr. Rieber received a total of $1,205 from 13 pharmaceutical and/or device companies across 48 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in hematology & oncology. 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. Rieber 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.
✓ 19 years in practice
▲ Top 3% volume in TX
$1,205 industry payments
Medicare Practice Summary
Medicare Utilization ↗149,797
Medicare services
Top 3% in TX for hematology & oncology
5,307
Unique beneficiaries
$11
Avg. Medicare payment
Medicare patients only (65+ / disabled) · Not a quality rating · How to read this →
~7,884 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 |
|---|---|---|---|
| Darbepoetin injection (Aranesp) for anemia An injection of darbepoetin alfa used for non-end-stage renal disease purposes. |
48,830 | $2 | $20 |
| Iron infusion (Feraheme) An injection of ferumoxytol used to treat iron deficiency anemia in patients not on dialysis. |
29,070 | $0 | $5 |
| Pembrolizumab injection (Keytruda) | 20,900 | $43 | $137 |
| Anti-nausea injection (fosaprepitant) An injection of fosaprepitant, a medication used to prevent nausea and vomiting. |
15,450 | $0 | $5 |
| Iron sucrose injection (Venofer) An injection of iron sucrose used to replenish iron levels in the body. |
11,200 | $0 | $2 |
| Immune globulin infusion (Octagam) This procedure involves the administration of immune globulin medication directly into a vein. It is provided in a non-lyophilized liquid form. |
4,480 | $33 | $235 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
3,010 | $0 | $1 |
| Injection, granisetron hydrochloride, 100 mcg | 1,730 | $0 | $24 |
| 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. |
1,413 | $8 | $36 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
1,407 | $8 | $20 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
1,252 | $10 | $64 |
| Anti-nausea injection (Aloxi/palonosetron) | 1,070 | $1 | $114 |
| Immunoglobulin level test A blood test that measures the level of gammaglobulins, which are immune system proteins. |
763 | $9 | $56 |
| 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. |
735 | $18 | $180 |
| 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. |
602 | $88 | $368 |
| 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. |
561 | $22 | $157 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
501 | $98 | $707 |
| 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. |
387 | $6 | $31 |
| 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. |
359 | $62 | $250 |
| Immunoglobulin light chain measurement A blood test that measures the levels of immunoglobulin light chains, which are proteins produced by plasma cells. |
346 | $17 | $60 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
318 | $13 | $60 |
| Iron level test | 317 | $6 | $27 |
| 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. |
317 | $9 | $35 |
| 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. |
312 | $130 | $496 |
| Zoledronic acid injection, 1 mg An injection of zoledronic acid administered at a dose of 1 mg. |
312 | $6 | $431 |
| 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. |
280 | $46 | $313 |
| 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. |
264 | $10 | $96 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
187 | $1 | $7 |
| Non-hormonal chemotherapy injection This procedure involves administering non-hormonal anti-neoplastic chemotherapy medication via injection into the skin or muscle tissue. |
185 | $55 | $211 |
| Beta-2 microglobulin level test A blood test that measures the level of beta-2 microglobulin, a protein produced by cells in the body. |
173 | $16 | $96 |
| 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. |
148 | $48 | $344 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
136 | $21 | $161 |
| Leuprolide acetate (for depot suspension), 7.5 mg | 135 | $134 | $3,675 |
| Reticulated platelet measurement A blood test that measures the level of young, newly formed platelets in the body. |
127 | $35 | $143 |
| 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. |
126 | $19 | $99 |
| 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. |
123 | $4 | $25 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
123 | $11 | $108 |
| 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. |
121 | $2 | $19 |
| Telephone medical discussion, 5-10 minutes A phone conversation with a physician lasting between 5 and 10 minutes to discuss medical matters. |
105 | $39 | $143 |
| Additional hour of intravenous infusion This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis. |
101 | $15 | $100 |
| Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries | 99 | $91 | $657 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
93 | $15 | $76 |
| 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. |
90 | $1,111 | $4,802 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
90 | $1 | $9 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
88 | $14 | $73 |
| PSA test (prostate cancer screening) | 88 | $18 | $94 |
| Manual white blood cell count A laboratory test that involves examining a sample under a microscope to manually count the number of white blood cells present. |
84 | $4 | $22 |
| 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. |
84 | $6 | $34 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
81 | $7 | $29 |
| 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. |
80 | $10 | $75 |
| Venipuncture for blood collection A procedure to draw blood from a vein for medical testing or analysis. |
72 | $65 | $264 |
| New patient office visit, complex (60-74 min) | 71 | $162 | $709 |
| Automated red blood cell count with calculations A blood test that automatically counts red blood cells and performs additional calculations to assess blood health. |
69 | $5 | $26 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
67 | $61 | $231 |
| 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. |
62 | $5 | $24 |
| Enhanced Oncology Model monthly payment This code represents the monthly enhanced oncology services payment under the Enhancing Oncology Model. It covers the administrative payment for enhanced services provided to eligible patients. |
60 | $69 | $70 |
| 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. |
54 | $24 | $256 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
51 | $16 | $80 |
| 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. |
49 | $17 | $114 |
| Immunologic analysis for detection of tumor antigen, quantitative; ca 125 | 41 | $20 | $128 |
| 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. |
40 | $23 | $145 |
| 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. |
36 | $102 | $565 |
| Immunologic analysis for detection of tumor antigen, quantitative; ca 15-3 | 32 | $20 | $128 |
| 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. |
32 | $55 | $298 |
| Alpha-fetoprotein (AFP) level test A blood test that measures the amount of alpha-fetoprotein in the serum. This test is used to monitor certain health conditions. |
30 | $16 | $102 |
| Injection, alteplase recombinant, 1 mg | 30 | $69 | $211 |
| Serum protein measurement A blood test that measures the total amount of protein in the serum. It helps evaluate overall health and nutritional status. |
28 | $11 | $99 |
| Serum immunofixation test A laboratory test that analyzes a blood serum sample to identify specific abnormal proteins. The procedure uses an immunologic technique to detect and characterize these proteins. |
27 | $22 | $160 |
| Total testosterone level test A blood test that measures the total amount of testosterone in your body. This hormone is important for various bodily functions in both men and women. |
24 | $25 | $143 |
| Haptoglobin level test A blood test that measures the amount of haptoglobin, a protein in the serum. It helps evaluate red blood cell breakdown. |
20 | $11 | $66 |
| Central venous tube declotting A procedure to clear a blockage or clot from a central venous catheter to restore its function. |
14 | $25 | $121 |
| C-reactive protein test (inflammation marker) A blood test that measures the level of C-reactive protein to detect the presence of infection or inflammation in the body. |
12 | $5 | $33 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
12 | $68 | $372 |
| Whole body nuclear medicine scan with CT A combined imaging procedure using nuclear medicine and CT scans to visualize the entire body. |
11 | $1,105 | $4,929 |
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.
23.6% high complexity
69.1% medium
7.3% routine
Industry Payment Transparency
Open Payments through 2024 ↗$1,205
Total received (2018-2024)
Avg $201/year across 6 years
Bottom 33% in TX for hematology & oncology
13
Companies
48
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.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$715 (59.4%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$490 (40.6%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$218
2023
$465
2022
$214
2021
$45
2019
$154
2018
$108
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
PFIZER INC.
$287
GENZYME CORPORATION
$166
Gilead Sciences, Inc.
$142
E.R. Squibb & Sons, L.L.C.
$137
Lilly USA, LLC
$125
AstraZeneca Pharmaceuticals LP
$125
Janssen Biotech, Inc.
$70
Apellis Pharmaceuticals, Inc.
$30
Alexion Pharmaceuticals, Inc.
$30
Janssen Pharmaceuticals, Inc
$30
Puma Biotechnology, Inc.
$23
Novartis Pharmaceuticals Corporation
$23
Regeneron Healthcare Solutions, Inc.
$17
Top 3 companies account for 49.4% of total payments
Associated products mentioned in payments ›
DARZALEX · Empaveli · IBRANCE · LIBTAYO · OPDIVO · RETEVMO · SARCLISA · SCEMBLIX · TALZENNA · TECVAYLI · Trodelvy · ULTOMIRIS · XARELTO
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 →
Most payments (59%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Equivalent to $1 per 100 Medicare services performed
Geographic Context
Hematology & oncology specialists within 10 mi
3
Per 100K population
11.0
County median income
$67,799
Nearest hospital
HILL COUNTRY MEMORIAL HOSPITAL
0.0 mi
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 measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Rieber is a mixed practice specialist, with above-average Medicare volume (top 3% in TX), with low-engagement industry engagement, 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. Rieber experienced with darbepoetin injection (aranesp) for anemia?
Based on Medicare claims data, Dr. Rieber performed 48,830 darbepoetin injection (aranesp) for anemia 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. Rieber receive payments from pharmaceutical companies?
Yes. Dr. Rieber received a total of $1,205 from 13 companies across 48 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. Rieber's costs compare to other hematology & oncology specialists in Fredericksburg?
Dr. Rieber's average Medicare payment per service is $11. 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. Rieber) 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. 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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