Katayoun Rezai, M.D.
Infectious Disease Physician · Chicago, IL
Katayoun Rezai, M.D. is an infectious disease physician with a practice address in Chicago, Illinois, and NPI 1730111576, issued on Jul 6, 2006. Check the license (Illinois 036104419, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Katayoun Rezai
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- 036104419 IL
036-104419 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1901 W Harrison St, Chicago, IL 60612
- Phone
- (312) 864-6000
- Enumerated
- Jul 6, 2006
- Record last updated
- Apr 28, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040901000788); accepts Medicare assignment
- Medical or professional school
- Rush Medical College Of Rush University, 1998
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 464 in Illinois → Look up another NPI →
Also registered at 1901 W Harrison St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elias Abate, M.D.Internal Medicine Physician1336712199
- Ayesha Abbasi, MDInternal Medicine Physician1376216705
- Milagros Abellera, APNNurse Practitioner1528076239
- Annette Abraham, MDInfectious Disease Physician1083195093
- Fidel Abrego, MDObstetrics & Gynecology Physician1245351824
- Bryan Acevedo, MDInternal Medicine Physician1598459612
Verify Katayoun Rezai 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 036104419Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% more Medicare Part D claims than the average infectious disease physician in 2024
815 Medicare Part D claims for 36 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 38% of claims. 29 claims were for opioids.
Most prescribed
- Biktarvy81 claims
- Genvoya38 claims
- Atorvastatin Calcium36 claims
- Odefsey31 claims
- Gabapentin24 claims
- Darunavir22 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 practice group's MIPS final score for 2023 (Medicare payment program): 84.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Cook CountyChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katayoun Rezai among 464 infectious disease physician records in Illinois
Katayoun Rezai, M.D. is one of 464 infectious disease physician records with a practice address in Illinois. 79% 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 16% of them.
- NPI issued2006 · 16% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1998 · median 2004 among the 311 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Illinois
There are 464 infectious disease physician records in Illinois.
All 464 in Illinois → Every provider in Chicago → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Stephanie Black, M.D.Chicago, IL 606121316908791
- Larry Goodman, M.DChicago, IL 606121356396550
- Alan Harris, M.D.Chicago, IL 606121699736488
- Mary Hayden, M.D.Chicago, IL 606121730140187
- Ronald Hershow, M.D.Chicago, IL 606121942241054
- Preeti Kaur, M.D.,M.P.H.Chicago, IL 606121972560639
- Harold Kessler, M.D.Chicago, IL 606121730140534
- John KowalskiChicago, IL 606121235178708
Common questions
What is Katayoun Rezai, M.D.'s NPI number?
Katayoun Rezai, M.D.'s National Provider Identifier (NPI) is 1730111576, issued on Jul 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Katayoun Rezai, M.D. located?
The NPPES record lists a practice address at 1901 W Harrison St, Chicago, IL, 60612. Phone: (312) 864-6000. Providers update this record themselves, so call before visiting.
How can I verify Katayoun Rezai, M.D.'s license?
NPPES lists Illinois license number 036104419, 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 Katayoun Rezai, M.D. prescribe under Medicare Part D?
In 2024, Katayoun Rezai, M.D. had 815 Medicare Part D claims for 36 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Katayoun Rezai, M.D.'s MIPS final score?
The 2023 MIPS final score is 84.6 of 100, reported for the practice group. 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.