Robert S. Katz, M.D.
Rheumatology Physician · Chicago, IL
Robert S. Katz, M.D. is a rheumatology physician with a practice address in Chicago, Illinois, and NPI 1790875797, issued on Oct 13, 2006. Check the license (Illinois 036053574, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Robert S. Katz
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 036053574 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1725 W Harrison St Ste 365, Chicago, IL 60612
- Phone
- (312) 226-8228
- Enumerated
- Oct 13, 2006
- Record last updated
- Nov 20, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (312) 226-5572
- Medicare enrollment
- Enrolled (PECOS I20090608000305); accepts Medicare assignment
- Medical or professional school
- Washington University School Of Medicine, 1971
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 340 in Illinois → Look up another NPI →
Also registered at 1725 W Harrison St Ste 365
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexandra Small, M.D.Rheumatology Physician1356722292
- Ben Small, MDRheumatology Physician1043656499
Verify Robert S. Katz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036053574Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% more Medicare Part D claims than the average rheumatology physician in 2024
3,452 Medicare Part D claims for 339 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 151 claims were for opioids.
Most prescribed
- Prednisone536 claims
- Methotrexate188 claims
- Cyclobenzaprine Hcl140 claims
- Amitriptyline Hcl100 claims
- Celecoxib90 claims
- Tramadol Hcl87 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 5.7 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $93.14
2 payments; by number, the most common kind was education; the largest payer was Janssen Biotech, Inc. The 4,486 providers of this specialty with any payment received $8,538.33 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Rheumatology Associates S.C.Chicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert S. Katz among 340 rheumatology physician records in Illinois
Robert S. Katz, M.D. is one of 340 rheumatology physician records with a practice address in Illinois. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1971 · median 2003 among the 244 with a school on file
- Record last updated2019 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Illinois
There are 340 rheumatology physician records in Illinois.
All 340 in Illinois → Every provider in Chicago → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Shiva AramiChicago, IL 606121629173968
- Sanford Baim, M.D.Chicago, IL 606121841227311
- Joel Block, M.D.Chicago, IL 606121285659771
- John Case, M.D.Chicago, IL 606121104840123
- Huan ChangChicago, IL 606121336244870
- Sarah Everakes, M.D.Chicago, IL 606121487687299
- Paul Glickman, M.D.Chicago, IL 606121801829510
- Meenakshi Jolly, M.D.Chicago, IL 606121316970015
Common questions
What is Robert S. Katz, M.D.'s NPI number?
Robert S. Katz, M.D.'s National Provider Identifier (NPI) is 1790875797, issued on Oct 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert S. Katz, M.D. located?
The NPPES record lists a practice address at 1725 W Harrison St Ste 365, Chicago, IL, 60612. Phone: (312) 226-8228. Providers update this record themselves, so call before visiting.
How can I verify Robert S. Katz, M.D.'s license?
NPPES lists Illinois license number 036053574, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert S. Katz, M.D. prescribe under Medicare Part D?
In 2024, Robert S. Katz, M.D. had 3,452 Medicare Part D claims for 339 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Robert S. Katz, M.D.'s MIPS final score?
The 2023 MIPS final score is 5.7 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.