Dr. Irena Chizhik, MD
- Medicare services, 2021
- 1,906
- Part D claims, 2024
- 93
- Hospital affiliations
- 1
- Industry payments
- $31
- Medical groups
- 2
- Practice address
- 1653 West Congress Parkway, Chicago, IL 60612
- Practice phone
- Call (312) 942-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chizhik's professional email, personal email and mobile number
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Dr. Irena Chizhik is an internist in Chicago, Illinois
Dr. Chizhik practices at Rush University Medical Center in Chicago, Illinois, part of Rush System for Health.
Dr. Chizhik's NPI, 1275501579, was assigned on March 10, 2006. Dr. Chizhik holds Illinois license 036096654.
- NPI
- 1275501579NPI Registry (opens in a new tab)
- NPI enumeration date
- March 10, 2006
- NPI status
- Active
- Practice phone
- (312) 942-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Irena Chizhik practices at Rush University Medical Center in Chicago, Illinois
Dr. Chizhik's primary practice is Rush University Medical Center, at 1653 West Congress Parkway, Chicago, IL 60612 in Cook County. The practice phone is (312) 942-5000.
- Rush University Medical Center1653 West Congress Parkway, Chicago, IL 60612 · Cook CountyPhone(312) 942-5000
Source: Dmand AI Affiliation Data
Dr. Irena Chizhik is affiliated with 2 sites of care and 2 medical groups
Dr. Chizhik's primary practice is Rush University Medical Center in Chicago, Illinois, part of Rush System for Health. The medical group on file is Erie Family Health Centers. Dmand AI also links Dr. Chizhik to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Irena Chizhik's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chizhik practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Rush University Medical Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Irena Chizhik is one of 5,652 internists in Illinois
Internal medicine is Dr. Chizhik's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chizhik is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Chizhik
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Irena Chizhik billed Medicare for 1,906 services in 2021
CMS data shows 1,906 Medicare services from Dr. Chizhik across 15 procedure codes in 2021. Medicare paid $113,695 for them. Every service was in an office.
Dr. Chizhik's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 1,1142021: 87921%
- Surgery
- 2020: 5352021: 5615%
- Tests and treatments
- 2020: 3142021: 21930%
- Other services
- 2020: 2792021: 19331%
- Drugs given in the office
- 2020: 462021: 5417%
Dr. Chizhik compared with the Illinois median for internists, 2021
- Dr. Chizhik
- Illinois median
- Medicare services
- 1,906vs 5663.4 times
- Part D claims
- 1,211vs 2844.3 times
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Chizhik's most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Chizhik?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chizhik and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Irena Chizhik's patients have a median age of 61
Across all payers, Dmand AI patient panel data puts Dr. Chizhik's median patient age at 61, with 71% women.
Dr. Chizhik's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women71%
- Men29%
Source: Dmand AI Patient Panel Data
Dr. Irena Chizhik wrote 93 Medicare Part D claims in 2024
In 2024, Dr. Chizhik wrote 93 Medicare Part D claims for 27 patients. 78% of them were for generic drugs. They cover 39 drugs, with $40,827 in total drug cost. In 2021, CMS named 5,111 claims across 109 drugs.
Dr. Chizhik's Part D claims by kind of drug, 2024
- Generic73 claims78%
- Brand-name20 claims22%
Dr. Chizhik's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 5,1112022: 1,21176%
Drugs named by CMS: 39 in 2022, 109 in 2021.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Irena Chizhik received $31 in industry payments from 2016 to 2018
CMS Open Payments shows 2 general payments to Dr. Chizhik from 2 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $17.
General payments to Dr. Chizhik by program year, 2016 to 2018
Companies that paid Dr. Chizhik the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Irena Chizhik's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Irena Chizhik
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Irena Chizhik's NPI number?
Dr. Irena Chizhik's NPI number is 1275501579. It was assigned on March 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Irena Chizhik?
Dr. Irena Chizhik is an internist in Chicago, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Irena Chizhik practice?
Dr. Chizhik practices at 1653 West Congress Parkway, Chicago, IL 60612. Dr. Chizhik's primary practice is Rush University Medical Center in Chicago, Illinois, part of Rush System for Health. Dmand AI also links Dr. Chizhik to 1 group practice or clinic and 1 medical group.
What is Dr. Irena Chizhik's office phone number?
The practice phone on file for Dr. Chizhik is (312) 942-5000.
What is Dr. Irena Chizhik's medical license number?
Dr. Chizhik holds Illinois license 036096654.
Which hospitals is Dr. Irena Chizhik affiliated with?
Dr. Chizhik practices at Rush University Medical Center in Chicago, Illinois.
What medical group is Dr. Irena Chizhik part of?
Dr. Chizhik is linked to Erie Family Health Centers. Dmand AI links Dr. Chizhik to 1 more medical group.
Does Dr. Irena Chizhik accept Medicare?
Yes. CMS data shows Dr. Chizhik billed Medicare for 1,906 services in 2021.
What services does Dr. Irena Chizhik bill to Medicare?
In 2021, Dr. Chizhik's most billed Medicare services were surgery: heart and blood vessels (36415), office visit, established patient (99214) and office visit, established patient (99215).
What drugs does Dr. Irena Chizhik prescribe most?
In 2022 Medicare Part D data, Dr. Chizhik's most prescribed drugs by claims were Amlodipine Besylate, Levothyroxine Sodium and Metoprolol Succinate.
Has Dr. Irena Chizhik received payments from drug or device companies?
CMS Open Payments shows $31 in general payments to Dr. Chizhik from 2 companies from 2016 to 2018. The largest total came from Pfizer Inc.
How long has Dr. Irena Chizhik been practicing?
Dr. Chizhik graduated from medical school in 1986, 40 years ago.
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