Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Guillermo Javier Ares Maisonet, MD

Individual provider Pediatric Surgery Physician · NPI 1942542105

Guillermo Javier Ares Maisonet, MD is a General Surgery in Maywood, Illinois. Qualified in 2013, 13 years ago. Practices with Lurie Children's Medical Group Inc, a 140-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
13
Licensed in
IL
In the registry since
2013
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2160 S 1st Ave
Maywood, IL 60153-3328
Phone: (708) 216-9000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 225 E Chicago Ave, Chicago, IL 60611-2991 — (800) 543-7362

Specialties & licences

Pediatric Surgery Physician (primary) Taxonomy 2086S0120X · Licence 036139625 (IL)

Record details

NPI number1942542105
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 25, 2013
Last updated in NPPESAugust 3, 2026
Certification dateAugust 3, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGENERAL SURGERY
Also practisesPEDIATRIC MEDICINE
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Lurie Children'S Medical Group Inc. — 140 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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