Dr. Robert Katz, M.D.
What this data tells you about Dr. Katz
Dr. Robert Katz is a rheumatology specialist in Chicago, IL, with 19 years of NPI registration. Based on federal Medicare data, Dr. Katz performed 74,896 Medicare services across 2,272 unique beneficiaries.
Between the years covered by Open Payments, Dr. Katz received a total of $1,190 from 7 pharmaceutical and/or device companies across 17 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in rheumatology. The majority of payments are for consulting, which typically reflects recognized clinical expertise sought by manufacturers. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Katz 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 |
|---|---|---|---|
| Certolizumab injection (Cimzia) An injection of certolizumab pegol administered under the direct supervision of a physician. |
56,000 | $4 | $19 |
| Abatacept infusion (Orencia) An injection of abatacept administered under the direct supervision of a physician. This code is used for Medicare when the drug is not self-administered. |
9,575 | $33 | $85 |
| Autoimmune disorder antibody test A laboratory test that measures antibodies in the blood to help assess for autoimmune disorders. |
4,744 | $18 | $175 |
| 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. |
762 | $64 | $159 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
629 | $8 | $29 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
621 | $29 | $314 |
| Rheumatoid arthritis antibody test A blood test to measure antibodies used in assessing rheumatoid arthritis. |
593 | $13 | $95 |
| DNA antibody test (native or double-stranded) A blood test that measures the level of antibodies targeting native or double-stranded DNA. This test is used to detect the presence of these specific antibodies in the body. |
593 | $13 | $170 |
| Measurement of dna antibody, single stranded | 593 | $12 | $162 |
| Non-hormonal chemotherapy injection This procedure involves administering non-hormonal anti-neoplastic chemotherapy medication via injection into the skin or muscle tissue. |
256 | $58 | $332 |
| 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. |
179 | $49 | $572 |
| Injection, methylprednisolone acetate, 40 mg | 159 | $6 | $81 |
| Joint injection, major joint Removal of fluid from a large joint and/or injection of medication into the joint space. |
52 | $47 | $312 |
| 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. |
47 | $10 | $332 |
| Tuberculosis test, enumeration of t-cells A blood test that counts T-cells to help detect tuberculosis infection. |
38 | $98 | $175 |
| 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. |
29 | $117 | $540 |
| Joint fluid aspiration or injection, small joint Removal of fluid from a small joint or injection of medication into a small joint. |
26 | $35 | $150 |
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 ›
The majority of payments (59%) are consulting fees, which typically reflect recognized clinical expertise sought by manufacturers.
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. Katz is a mixed practice specialist, with above-average Medicare volume (top 14% in IL), with consulting-driven 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. Katz experienced with certolizumab injection (cimzia)?
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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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