Dr. Cornelia Yillasan Tandez, MD
- Part D claims, 2024
- 18
- Hospital affiliations
- 1
- Industry payments
- $49
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 225 E Chicago Ave, Box 140, Chicago, IL 60611
- Practice phone
- Call (312) 227-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Tandez's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Cornelia Yillasan Tandez is a pediatrician in Chicago, Illinois
Dr. Tandez practices at Ann & Robert H. Lurie Children's Hospital of Chicago in Chicago, Illinois, part of Ann & Robert H. Lurie Children's Hospital of Chicago.
Dr. Tandez's NPI, 1568555951, was assigned on September 30, 2006.
- NPI
- 1568555951NPI Registry (opens in a new tab)
- NPI enumeration date
- September 30, 2006
- NPI status
- Active
- Practice phone
- (312) 227-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Cornelia Yillasan Tandez practices at Ann & Robert H. Lurie Children's Hospital of Chicago in Chicago, Illinois
Dr. Tandez's primary practice is Ann & Robert H. Lurie Children's Hospital of Chicago, at 225 E Chicago Ave, Box 140, Chicago, IL 60611 in Cook County. The practice phone is (312) 227-4000.
- Ann & Robert H. Lurie Children's Hospital of Chicago225 E Chicago Ave, Box 140, Chicago, IL 60611 · Cook CountyPhone(312) 227-4000
Source: Dmand AI Affiliation Data
Dr. Cornelia Yillasan Tandez is affiliated with 3 sites of care
Dr. Tandez's primary practice is Ann & Robert H. Lurie Children's Hospital of Chicago in Chicago, Illinois, part of Ann & Robert H. Lurie Children's Hospital of Chicago. Dmand AI also links Dr. Tandez to 1 clinical lab and 1 physician office, 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. Cornelia Yillasan Tandez's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tandez practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ann & Robert H. Lurie Children's Hospital of Chicago | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Ann & Robert H. Lurie Children's Hospital of Chicago and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Cornelia Yillasan Tandez is one of 2,423 pediatricians in Illinois
Pediatrics is Dr. Tandez's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. Tandez has a license on file in Illinois.
Specialties and state licenses
- Pediatrics, Illinois
Pediatricians near Dr. Tandez
Counts of pediatricians 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. Cornelia Yillasan Tandez's patients have a median age of 14
Across all payers, Dmand AI patient panel data puts Dr. Tandez's median patient age at 14, with 53% women.
Dr. Tandez's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 14
Patient panel by sex, all payers
- Women53%
- Men47%
Source: Dmand AI Patient Panel Data
Dr. Cornelia Yillasan Tandez wrote 18 Medicare Part D claims in 2024
In 2024, Dr. Tandez wrote 18 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $286 in total drug cost. In 2018, CMS named 15 claims across 1 drug.
Dr. Tandez's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 152019: 1127%
Drugs named by CMS: 1 in 2019, 1 in 2018.
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. Cornelia Yillasan Tandez received $49 in industry payments from 2018 to 2020
CMS Open Payments shows 4 general payments to Dr. Tandez from 1 drug or device company from 2018 to 2020. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $49.
General payments to Dr. Tandez by program year, 2018 to 2020
Companies that paid Dr. Tandez the most, 2018 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Cornelia Yillasan Tandez'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 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. Cornelia Yillasan Tandez
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. Cornelia Yillasan Tandez's NPI number?
Dr. Cornelia Yillasan Tandez's NPI number is 1568555951. It was assigned on September 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Cornelia Yillasan Tandez?
Dr. Cornelia Yillasan Tandez is a pediatrician in Chicago, Illinois. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. Cornelia Yillasan Tandez practice?
Dr. Tandez practices at 225 E Chicago Ave, Box 140, Chicago, IL 60611. Dr. Tandez's primary practice is Ann & Robert H. Lurie Children's Hospital of Chicago in Chicago, Illinois, part of Ann & Robert H. Lurie Children's Hospital of Chicago. Dmand AI also links Dr. Tandez to 1 clinical lab and 1 physician office.
What is Dr. Cornelia Yillasan Tandez's office phone number?
The practice phone on file for Dr. Tandez is (312) 227-4000.
Which hospitals is Dr. Cornelia Yillasan Tandez affiliated with?
Dr. Tandez practices at Ann & Robert H. Lurie Children's Hospital of Chicago in Chicago, Illinois.
What drugs does Dr. Cornelia Yillasan Tandez prescribe most?
In 2019 Medicare Part D data, Dr. Tandez's most prescribed drugs by claims were Cryselle.
Has Dr. Cornelia Yillasan Tandez received payments from drug or device companies?
CMS Open Payments shows $49 in general payments to Dr. Tandez from 1 company from 2018 to 2020. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Cornelia Yillasan Tandez been practicing?
Dr. Tandez's NPI was assigned in 2006.
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