GUILLERMO JAVIER ARES MAISONET, MD — NPI 1942542105 (Licensed & Credentialed Allopathic & Osteopathic Physicians — Surgery

CMS-1500 Box 24J / 33a • NPI

1942542105

Type 1 Individual Rendering/Ordering

HIPAA NUCC Taxonomy • CMS Code

2086S0120X (CMS 02)

Licensed & Credentialed Allopathic & Osteopathic Physicians — Surgery — Pediatric Surgery

Box 32 Service Location & ZIP+4

2160 S 1ST AVE, MAYWOOD, IL, 60153-3328

✓ 9-Digit EDI 837 ZIP+4 (60153-3328)

Practice Phone & Referral Fax

(708) 216-9000

Direct NPPES Verification Line

✓ HHS OIG LEIE Sanction Screening — VERIFIED CLEAR: NPI 1942542105 (GUILLERMO JAVIER ARES MAISONET, MD) has 0 active federal exclusions across all 84,224 HHS OIG LEIE sanction records (Database Verified: 2026-11-11).

CMS Medicare Order & Referring PECOS Eligibility

This practitioner does not currently appear in the CMS individual Order & Referring PECOS file (may practice in pediatrics, commercial-only networks, or hospital-employed settings).

Official CMS NPPES Credential & Practice Profile

10-Digit NPI Number	`1942542105` (NPI-1 Individual Practitioner)
Provider / Legal Name	GUILLERMO JAVIER ARES MAISONET, MD
Plain-English Specialty	Licensed & Credentialed Allopathic & Osteopathic Physicians — Surgery — Pediatric Surgery NUCC Code: `2086S0120X` (Surgery, Pediatric Surgery)
Certifying / Licensing Body	State Medical / Healthcare Licensing Board & National Specialty Board
Practice Location Address	2160 S 1ST AVE, MAYWOOD, IL, 60153-3328
Practice Telephone / Fax	Tel: (708) 216-9000
Administrative Mailing Address	225 E CHICAGO AVE, CHICAGO, IL, 60611-2991
Enumeration & Last Sync	Enumerated: 2013-03-25 \| CMS Record Updated: 2026-08-20

Clinic Location, Accessibility & Directions

📍 Practice Location & Patient Access

2160 S 1ST AVE, MAYWOOD, IL, 60153-3328

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Plain-English Taxonomy & CMS Crosswalk (2086S0120X)

What Does Taxonomy Code 2086S0120X Mean?

In the HIPAA National Uniform Claim Committee (NUCC) classification, code 2086S0120X translates to:
"Licensed & Credentialed Allopathic & Osteopathic Physicians — Surgery — Pediatric Surgery"

CMS-1500 Medicare Specialty Crosswalk: CMS Code 02 (Physician/General Surgery)
Certifying / Accrediting Authority: State Medical / Healthcare Licensing Board & National Specialty Board
Clinical Scope: Consult a verified Surgery, Pediatric Surgery for specialized diagnostic evaluation, treatment planning, and continuity of care.

Specialty Clinical Procedures & Therapeutic Classes

Standard Scope of Care (GUILLERMO JAVIER ARES MAISONET, MD)

Typical CPT / Diagnostic Procedures:

Comprehensive Outpatient & Inpatient Clinical Evaluation (CPT 99202–99215)
Diagnostic Workup, Laboratory Ordering & Evidence-Based Care Coordination
Preventive Screening, Patient Counseling & Multidisciplinary Referral

Common Therapeutic Classes:

Evidence-Based Specialty Pharmacotherapy & Preventive Regimens (CMS Part D Standard)

All Registered NUCC Taxonomies & State Licenses

Taxonomy Code & Plain-English Description	State License & Primary Status
`2086S0120X` — Surgery, Pediatric Surgery Plain English: Licensed & Credentialed Allopathic & Osteopathic Physicians — Surgery — Pediatric Surgery	State: IL \| License: `036139625` \| Primary: Yes (Primary)

Medical Billing, RCM & Hospital Credentialing Teams:

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GUILLERMO JAVIER ARES MAISONET, MD (NPI #1942542105)