GUILLERMO JAVIER ARES MAISONET MD
NPI 1942542105
Surgery - Pediatric Surgery in Maywood, IL
About Guillermo Javier Ares Maisonet Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GUILLERMO JAVIER ARES MAISONET MD (NPI 1942542105) is an individual pediatric surgery provider in Maywood, Illinois, licensed in Illinois (036139625) and active in the NPI registry since March 2013. He is enrolled in Medicare PECOS, maintains 6 additional practice locations, and is a graduate of Other (2013).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Locations 6
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Guillermo Javier Ares Maisonet Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MAYWOOD, IL 60153
MAYWOOD, IL 60153
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Guillermo Ares Maisonet's NPI number?
The NPI number for Guillermo Ares Maisonet is 1942542105. It was assigned to this individual provider in the NPPES registry on March 25, 2013. The provider is also known as Guillermo Javier Ares Maisonet MD.
Where is Guillermo Ares Maisonet located?
Guillermo Ares Maisonet practices at 2160 S 1st Ave, Maywood, IL 60153. The listed phone number is (708) 216-9000.
What is Guillermo Ares Maisonet's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Pediatric Surgery, with taxonomy code 2086S0120X.
Is Guillermo Ares Maisonet enrolled in Medicare?
Yes. Guillermo Ares Maisonet is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
When was this NPI record last updated?
The NPPES record for Guillermo Ares Maisonet was last updated on August 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Guillermo Javier Ares Maisonet, MD · NPI 1942542105
Pediatric Surgery physician in Maywood, Illinois. Individual provider, active in the CMS NPPES registry since March 25, 2013.
## Identity
- **NPI:** 1942542105 (Entity type: Individual)
- **Enumerated:** March 25, 2013
- **Primary specialty:** Surgery - Pediatric Surgery · taxonomy 2086S0120X
- **State license:** 036139625 (Illinois)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 2160 S 1ST AVE, Maywood, IL 60153-3328
- **Phone:** (708) 216-9000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** August 20, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1942542105) · Data from the CMS NPPES public registry.