Dr. Oscar Alonso, M.D.
What this data tells you about Dr. Alonso
Dr. Oscar Alonso is an optician specialist in Downers Grove, IL, with 20 years of NPI registration. Based on federal Medicare data, Dr. Alonso performed 811 Medicare services across 683 unique beneficiaries.
Between the years covered by Open Payments, Dr. Alonso received a total of $929 from 23 pharmaceutical and/or device companies across 52 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in optician. 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. Alonso 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
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 |
|---|---|---|---|
| Ear wax removal A procedure to remove impacted ear wax from the ear canal. |
236 | $37 | $105 |
| 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. |
227 | $65 | $252 |
| Comprehensive hearing and speech recognition test A diagnostic evaluation that assesses hearing ability and the capacity to understand spoken words. The test measures how well a patient can detect sounds and recognize speech. |
111 | $28 | $112 |
| 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. |
61 | $81 | $336 |
| Test to assess defects in adaptation to sounds A diagnostic test used to evaluate how well the auditory system adapts to sounds. It assesses specific defects in sound adaptation processes. |
48 | $28 | $56 |
| Comprehensive hearing test A complete evaluation of hearing ability to assess how well a person can hear sounds across different frequencies and volumes. |
47 | $26 | $99 |
| Ear probe test for repeated sounds A probe is placed in the ear to measure how the ear responds to repeated sounds. The results are interpreted and a report is provided. |
47 | $26 | $141 |
| Brain response to sound test for hearing status A test that measures the brain's electrical response to sound to determine hearing status. The results are interpreted and reported by a medical professional. |
34 | $66 | $281 |
Industry Payment Transparency
Open Payments through 2024 ↗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 (2024)
All-time payments by company (2018-2024) ›
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
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 reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Alonso is a clinical cardiology specialist, with moderate Medicare volume, with low-engagement industry engagement, 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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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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