Dr. John Mayer, MD
What this data tells you about Dr. Mayer
Dr. John Mayer is an orthopedic surgery specialist in Gurnee, IL, with 20 years of NPI registration. Based on federal Medicare data, Dr. Mayer performed 1,199 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Mayer received a total of $70 from 4 pharmaceutical and/or device companies across 4 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. Mayer 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 |
|---|---|---|---|
| Steroid injection (triamcinolone) A 10 mg injection of triamcinolone acetonide, a corticosteroid medication. This code specifies the drug and dosage administered. |
648 | $1 | $20 |
| 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. |
154 | $56 | $151 |
| Joint injection, major joint Removal of fluid from a large joint and/or injection of medication into the joint space. |
116 | $48 | $152 |
| 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. |
78 | $72 | $230 |
| Knee X-ray, 4 or more views An imaging test using X-rays to create multiple pictures of the knee joint from different angles. |
35 | $26 | $73 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
35 | $38 | $93 |
| 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. |
26 | $82 | $221 |
| 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. |
23 | $26 | $61 |
| X-ray of lower and sacral spine, 2-3 views An X-ray imaging test that captures 2 to 3 views of the lower back and sacral spine to visualize the bones and joints in this area. |
21 | $21 | $55 |
| Injection of carpal tunnel | 14 | $58 | $164 |
| New patient office visit, 15-29 minutes An initial office visit for a new patient lasting 15 to 29 minutes. This code is used when the total time spent on the date of the encounter meets this duration threshold. |
14 | $49 | $159 |
| Tendon or ligament injection A procedure involving the injection of medication into a tendon or ligament. |
13 | $32 | $127 |
| Total knee replacement | 11 | $987 | $3,297 |
| X-ray of both knees, standing An X-ray image of both knees taken while the patient is standing to assess bone alignment and joint space under weight-bearing conditions. |
11 | $24 | $59 |
Industry Payment Transparency
Open Payments through 2022 ↗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 (2022)
All-time payments by company (2018-2022) ›
Associated products mentioned in payments ›
Geographic Context
4.2 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 2022 |
| 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. Mayer is a clinical cardiology specialist, with moderate Medicare volume, 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
Is Dr. Mayer experienced with steroid injection (triamcinolone)?
Does Dr. Mayer receive payments from pharmaceutical companies?
How do Dr. Mayer's costs compare to other orthopedic surgeons in Gurnee?
What does Data Coverage mean?
Is this data up to date?
Explore related providers
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.
Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology