Robert Ratajczak, MD
Psychiatry Physician · Chicago, IL
Robert Ratajczak, MD is a psychiatry physician with a practice address in Chicago, Illinois, and NPI 1851911747, issued on Apr 21, 2020. Check the license (Illinois 125.075645, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Robert Ratajczak
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 125.075645 IL
Self-reported in NPPES; status is on the state search - Practice location
- 213 W Institute PL Ste 500, Chicago, IL 60610
- Phone
- (312) 945-0780
- Enumerated
- Apr 21, 2020
- Record last updated
- Jun 15, 2026
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,147 in Illinois → Look up another NPI →
Also registered at 213 W Institute PL Ste 500
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Samer Alhato, LSWSocial Worker1336096171
- Victoria AtwaterSocial Worker1033045281
- Jade Avery, MDPsychiatry Physician1487218772
- Michel CarterProfessional Counselor1073189585
- Matthew Caston, LCPCMental Health Counselor1154881233
- Katie Catalano, LCSWClinical Social Worker1699220012
Verify Robert Ratajczak 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 125.075645Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average psychiatry physician in 2024
49 Medicare Part D claims for 12 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Robert Ratajczak among 2,147 psychiatry physician records in Illinois
Robert Ratajczak, MD is one of 2,147 psychiatry physician records with a practice address in Illinois. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 81% of them.
- NPI issued2020 · 81% of these records are older, 16% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 41% of these records are
- Record last updated2026 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
841 psychiatry physician records list a practice address in Chicago
They are 841 of the 63,379 NPPES records with a practice address in Chicago, and 2,147 psychiatry physician records in Illinois.
All 2,147 in Illinois → Every provider in Chicago → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Jade Avery, MDChicago, IL 606101487218772
- Balin Durr, M.D.Chicago, IL 606101356438147
- Rachel Klauber, DOChicago, IL 606101932668993
- Robert Leider, M.D.Chicago, IL 606101518135052
- Michel Louvain, MDChicago, IL 606101720257660
- Victoria Nee, M.D.Chicago, IL 606101417999756
- Ghada Albeheary, MDChicago, IL 606111477534576
- Motaz Alshami, MDChicago, IL 606091336636398
Common questions
What is Robert Ratajczak, MD's NPI number?
Robert Ratajczak, MD's National Provider Identifier (NPI) is 1851911747, issued on Apr 21, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Robert Ratajczak, MD located?
The NPPES record lists a practice address at 213 W Institute PL Ste 500, Chicago, IL, 60610. Phone: (312) 945-0780. Providers update this record themselves, so call before visiting.
How can I verify Robert Ratajczak, MD's license?
NPPES lists Illinois license number 125.075645, 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 Ratajczak, MD prescribe under Medicare Part D?
In 2024, Robert Ratajczak, MD had 49 Medicare Part D claims for 12 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
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.