Abigayil Cassandre Dieguez, MD
Pediatrics Physician · Chicago, IL
Abigayil Cassandre Dieguez, MD is a pediatrics physician with a practice address in Chicago, Illinois, and NPI 1275037970, issued on Mar 19, 2018. Check the license (Illinois 036155557, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Abigayil Cassandre Dieguez
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License numbers
- 036155557 IL
125.071698 IL
Self-reported in NPPES; status is on the state search - Practice location
- 225 E Chicago Ave, Chicago, IL 60611
- Phone
- (312) 227-4000
- Enumerated
- Mar 19, 2018
- Record last updated
- Mar 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 3,176 in Illinois → Look up another NPI →
Also registered at 225 E Chicago Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jasmene Abernathy, MDStudent in an Organized Health Care Education/Training Program1881454957
- Tamkeen Abreu, PHARMD, BCPSPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1366888653
- Matthew Abts, MDPediatric Pulmonology Physician1588989750
- Samuel AccordinoStudent in an Organized Health Care Education/Training Program1194525204
- Carly Adajian, DDSDentist1184373029
- Julie Adams, RDRegistered Dietitian1417569153
Verify Abigayil Cassandre Dieguez 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 036155557Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $217.77
1 payment: food and beverage; the largest payer was Beta Bionics, Inc. The 21,580 providers of this specialty with any payment received $842.05 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Abigayil Cassandre Dieguez among 3,176 pediatrics physician records in Illinois
Abigayil Cassandre Dieguez, MD is one of 3,176 pediatrics physician records with a practice address in Illinois. 32% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 76% of them.
- NPI issued2018 · 76% of these records are older, 22% newer
- In a Medicare fileYes · 32% of these records are
- In the CMS Doctors and Clinicians fileNo · 7% of these records are
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,142 pediatrics physician records list a practice address in Chicago
They are 1,142 of the 63,379 NPPES records with a practice address in Chicago, and 3,176 pediatrics physician records in Illinois.
All 3,176 in Illinois → Every provider in Chicago → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Kavita Alford, M.D.Chicago, IL 606111356399984
- Helen Binns, MD MPHChicago, IL 606111619945094
- Rebecca Carl, M.D.Chicago, IL 606111689639957
- Joel Frader, MDChicago, IL 606111871561340
- Maureen Haugen, APN NPChicago, IL 606111952359655
- David Jung, M.D.Chicago, IL 606111851380943
- Osama Kattih, M.D.Chicago, IL 606111437148558
- Deepa Nair, MDChicago, IL 606111265498885
Common questions
What is Abigayil Cassandre Dieguez, MD's NPI number?
Abigayil Cassandre Dieguez, MD's National Provider Identifier (NPI) is 1275037970, issued on Mar 19, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Abigayil Cassandre Dieguez, MD located?
The NPPES record lists a practice address at 225 E Chicago Ave, Chicago, IL, 60611. Phone: (312) 227-4000. Providers update this record themselves, so call before visiting.
How can I verify Abigayil Cassandre Dieguez, MD's license?
NPPES lists Illinois license number 036155557, 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.
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.