Medicare Enrolled
Dr. Ajay Chapa, MD
Radiation Oncology · Chicago, IL
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. Chapa 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. Chapa
Dr. Ajay Chapa is a radiation oncology specialist in Chicago, IL, with 19 years of NPI registration. Based on federal Medicare data, Dr. Chapa performed 2,039 Medicare services across 1,285 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chapa received a total of $214 from 3 pharmaceutical and/or device companies across 3 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in radiation 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. Chapa 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.
✓ 19 years in practice
▲ 2,039 Medicare services
$214 industry payments
Medicare Practice Summary
Medicare Utilization ↗2,039
Medicare services
Bottom 45% in IL for radiation oncology
1,285
Unique beneficiaries
$18
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~107 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 |
|---|---|---|---|
| Injection, ropivacaine hydrochloride, 1 mg | 276 | $0 | $1 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
200 | $0 | $1 |
| 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. |
156 | $0 | $2 |
| Steroid injection (triamcinolone) A 10 mg injection of triamcinolone acetonide, a corticosteroid medication. This code specifies the drug and dosage administered. |
148 | $1 | $6 |
| Abdominal X-ray, 1 view An X-ray image of the abdomen taken from a single angle to visualize internal structures. |
131 | $7 | $50 |
| Chest X-ray, 1 view An X-ray image of the chest taken from a single angle. This imaging test is used to visualize the structures within the chest cavity. |
101 | $7 | $50 |
| MRI of leg joint, without contrast A magnetic resonance imaging scan of a joint in the leg performed without the use of contrast dye. |
87 | $53 | $347 |
| Knee X-ray, 1-2 views An X-ray imaging test of the knee joint using one to two different angles to visualize the bones and surrounding structures. |
71 | $7 | $45 |
| MRI of pelvis with and without contrast A magnetic resonance imaging scan of the pelvic area performed both before and after the administration of a contrast dye to enhance image detail. |
56 | $84 | $581 |
| Knee X-ray, 3 views An X-ray imaging test of the knee joint that captures three different angles to evaluate the bones and surrounding structures. |
55 | $7 | $47 |
| MRI of arm joint, without contrast An MRI scan uses magnetic fields and radio waves to create detailed images of the arm joint. This specific procedure is performed without the use of a contrast dye. |
50 | $54 | $347 |
| Shoulder X-ray, 2+ views An X-ray imaging test of the shoulder joint using at least two different angles to visualize the bones and surrounding structures. |
42 | $8 | $47 |
| X-ray of entire middle and lower spine, 2-3 views An X-ray imaging test that captures 2 to 3 views of the entire middle and lower spine to visualize the bones and structures in these areas. |
41 | $13 | $84 |
| Pelvis X-ray, 1-2 views An X-ray imaging test of the pelvic area using one to two different angles to visualize the bones and joints. |
41 | $7 | $45 |
| Hip X-ray, 2-3 views An X-ray imaging test of the hip joint using two to three different angles to visualize the bones and surrounding structures. |
41 | $9 | $61 |
| Fluoroscopic guidance for needle placement Use of real-time X-ray imaging to guide the precise placement of a needle during a medical procedure. |
39 | $94 | $425 |
| Foot X-ray, 3+ views An X-ray imaging test of the foot that captures at least three different views to evaluate the bones and joints. |
36 | $6 | $45 |
| Joint injection, major joint Removal of fluid from a large joint and/or injection of medication into the joint space. |
34 | $56 | $396 |
| Complete ultrasound scan of joint An ultrasound exam that uses sound waves to create detailed images of a joint. This procedure allows for the visualization of the joint's internal structures. |
34 | $36 | $164 |
| 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. |
33 | $5 | $37 |
| X-ray of lower leg, 2 views An X-ray imaging test of the lower leg using two different angles to visualize the bones and surrounding structures. |
28 | $7 | $45 |
| Radiologist review of CT-guided needle placement A radiologist reviews the CT imaging used to guide the placement of a needle. |
26 | $60 | $298 |
| Bone marrow biopsy and aspiration A procedure to remove a small sample of bone marrow and liquid for laboratory testing. The sample is analyzed to help diagnose various medical conditions. |
23 | $65 | $427 |
| X-ray of thigh bone, minimum 2 views An X-ray imaging test of the thigh bone using at least two different angles to visualize the bone structure. |
23 | $7 | $49 |
| X-ray of both hips, 2 views An X-ray imaging test that captures two views of both hip joints to evaluate bone structure and alignment. |
22 | $9 | $60 |
| MRI of leg with and without contrast An MRI scan of the leg performed both before and after the administration of a contrast dye to enhance image detail. |
22 | $83 | $554 |
| Elbow X-ray, minimum 3 views An X-ray imaging test of the elbow joint that captures at least three different angles to visualize the bones and surrounding structures. |
21 | $6 | $45 |
| Wrist X-ray, minimum 3 views An imaging test using X-rays to capture at least three different angles of the wrist bones and joints. |
20 | $7 | $45 |
| Sacral spine nerve root injection with imaging guidance An injection of anesthetic and/or steroid medication into a sacral spine nerve root. The procedure uses imaging guidance to ensure accurate placement. |
19 | $234 | $2,314 |
| X-ray of upper arm, minimum of 2 views An X-ray imaging test of the upper arm that captures at least two different views to evaluate the bones and surrounding structures. |
19 | $7 | $45 |
| X-ray of hand, minimum of 3 views An X-ray imaging test of the hand that captures at least three different angles to visualize the bones and joints. |
19 | $7 | $45 |
| Chest X-ray, 2 views An X-ray imaging test of the chest that captures two different angles to visualize the lungs, heart, and chest wall. |
17 | $8 | $55 |
| Rib X-ray, minimum 3 views An X-ray imaging test of the ribs on one side of the body. The procedure includes a minimum of three different views to capture detailed images. |
17 | $10 | $69 |
| CT scan of arm, without contrast A CT scan of the arm that uses X-rays to create detailed images of the arm's internal structures without the use of contrast dye. |
17 | $39 | $282 |
| CT scan of leg, without contrast A computed tomography scan of the leg performed without the use of contrast dye. This imaging test uses X-rays to create detailed cross-sectional images of the leg's internal structures. |
17 | $38 | $282 |
| Ankle X-ray, minimum 3 views An X-ray imaging test of the ankle that captures at least three different angles to evaluate the bones and joints. |
15 | $7 | $45 |
| X-ray of multiple joints An X-ray imaging test that captures images of several joints simultaneously to evaluate their structure and alignment. |
15 | $14 | $83 |
| Knee X-ray, 4 or more views An imaging test using X-rays to create multiple pictures of the knee joint from different angles. |
14 | $8 | $57 |
| MRI of leg, without contrast A magnetic resonance imaging scan of the leg performed without the use of contrast dye to visualize internal structures. |
13 | $54 | $347 |
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.
Industry Payment Transparency
Open Payments through 2023 ↗$214
Total received (2018-2023)
Avg $71/year across 3 years
Top 48% in IL for radiation oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
3
Companies
3
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
$214 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2023
$55
2022
$126
2018
$32
Payments by company (2023)
Consulting
Speaking
Meals & Travel
Research
Philips Electronics North America Corporation
$55
Top 3 companies account for 100.0% of 2023 payments
All-time payments by company (2018-2023) ›
Siemens Medical Solutions USA, Inc.
$126
Philips Electronics North America Corporation
$55
GE Healthcare
$32
Top 3 companies account for 100.0% of all-time payments
Associated products mentioned in payments ›
(4108) Operational Informatics Undivided · MAGNETOM Free.Max
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 (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Radiation oncologists within 10 mi
952
Per 100K population
18.4
County median income
$81,797
Nearest hospital
NORTHWESTERN 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 2023 |
| 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 reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Chapa is a mixed practice specialist, with moderate Medicare volume, with low-engagement industry engagement, with 19 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Chapa experienced with injection, ropivacaine hydrochloride, 1 mg?
Based on Medicare claims data, Dr. Chapa performed 276 injection, ropivacaine hydrochloride, 1 mg 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. Chapa receive payments from pharmaceutical companies?
Yes. Dr. Chapa received a total of $214 from 3 companies across 3 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. Chapa's costs compare to other radiation oncologists in Chicago?
Dr. Chapa's average Medicare payment per service is $18. 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. Chapa) 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. 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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