Dr. Esther Kwak, DO
- Medicare services, 2023
- 118
- Part D claims, 2022
- 28
- Industry payments
- $954
- State license
- 1
- Year NPI issued
- 2019
- Practice address
- 2500 Ridge Ave, Evanston, IL 60201
- Practice phone
- Call (847) 570-2505
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Kwak's professional email, personal email and mobile number
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Dr. Esther Kwak is an internist in Evanston, Illinois
Dr. Kwak practices in Evanston, Illinois.
Dr. Kwak's NPI, 1578024055, was assigned on March 27, 2019. Dr. Kwak graduated from Midwestern University, Chicago College of Osteopathic Med in 2019. Dr. Kwak holds Illinois license 036158665.
- NPI
- 1578024055NPI Registry (opens in a new tab)
- NPI enumeration date
- March 27, 2019
- NPI status
- Active
- Practice phone
- (847) 570-2505
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Esther Kwak's practice address is in Evanston, Illinois
Dr. Kwak's practice address in the NPI Registry is 2500 Ridge Ave, Evanston, IL 60201, in Cook County. The practice phone is (847) 570-2505.
- NPI Registry address2500 Ridge Ave, Evanston, IL 60201 · Cook CountyPhone(847) 570-2505
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Esther Kwak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kwak practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Kwak's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Esther Kwak is one of 5,652 internists in Illinois
Internal medicine is Dr. Kwak's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Kwak is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Kwak
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. Esther Kwak billed Medicare for 118 services in 2023
CMS data shows 118 Medicare services from Dr. Kwak across 3 procedure codes in 2023. Medicare paid $9,374 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Kwak's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1292023: 1189%
Dr. Kwak compared with the Illinois median for internists, 2023
- Dr. Kwak
- Illinois median
- Medicare services
- 118vs 56679% below
- Part D claims
- 28vs 28490% below
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Kwak's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kwak and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Esther Kwak's patients have a median age of 60
Across all payers, Dmand AI patient panel data puts Dr. Kwak's median patient age at 60, with 50% women.
Dr. Kwak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Esther Kwak wrote 28 Medicare Part D claims in 2022
In 2022, Dr. Kwak wrote 28 Medicare Part D claims. Every claim was for a generic drug. They cover 2 drugs, with $492 in total drug cost. In 2021, CMS named 49 claims across 3 drugs.
Dr. Kwak'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: 492022: 2843%
Drugs named by CMS: 2 in 2022, 3 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Esther Kwak received $954 in industry payments from 2020 to 2025
CMS Open Payments shows 14 general payments to Dr. Kwak from 9 drug and device companies from 2020 to 2025. Food and beverage make up the largest share, 51% of the total. Medtronic, Inc. paid the most, $598.
General payments to Dr. Kwak by program year, 2020 to 2025
General payments to Dr. Kwak by kind, 2020 to 2025
- Food and beverage$49051%
- Travel and lodging$46449%
Companies that paid Dr. Kwak the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Esther Kwak graduated from Midwestern University, Chicago College of Osteopathic Med
Dr. Kwak graduated from Midwestern University, Chicago College of Osteopathic Med in 2019.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Esther Kwak'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Esther Kwak
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. Esther Kwak's NPI number?
Dr. Esther Kwak's NPI number is 1578024055. It was assigned on March 27, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Esther Kwak?
Dr. Esther Kwak is an internist in Evanston, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Esther Kwak practice?
Dr. Kwak practices at 2500 Ridge Ave, Evanston, IL 60201.
What is Dr. Esther Kwak's office phone number?
The practice phone on file for Dr. Kwak is (847) 570-2505.
What is Dr. Esther Kwak's medical license number?
Dr. Kwak holds Illinois license 036158665.
Does Dr. Esther Kwak accept Medicare?
Yes. CMS data shows Dr. Kwak billed Medicare for 118 services in 2023.
What services does Dr. Esther Kwak bill to Medicare?
In 2023, Dr. Kwak's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and hospital inpatient care (99239).
Where did Dr. Esther Kwak go to medical school?
Dr. Kwak graduated from Midwestern University, Chicago College of Osteopathic Med in 2019.
What drugs does Dr. Esther Kwak prescribe most?
In 2022 Medicare Part D data, Dr. Kwak's most prescribed drugs by claims were Atorvastatin Calcium and Amlodipine Besylate.
Has Dr. Esther Kwak received payments from drug or device companies?
CMS Open Payments shows $954 in general payments to Dr. Kwak from 9 companies from 2020 to 2025. The largest total came from Medtronic, Inc.
How long has Dr. Esther Kwak been practicing?
Dr. Kwak graduated from medical school in 2019, 7 years ago.
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