Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Oa Labs Clinic LLC.

Q: What is the NPI number for Oa Labs Clinic LLC.?

The NPI for Oa Labs Clinic LLC. is 1538669510, a Type 2 (organization) record in the CMS NPPES registry.

Endocrinology, Diabetes & Metabolism Physician in Westmont, IL · enumerated 2018 · authorized official Nicholas Mataragas, Director of Medicine.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1538669510

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Registry record

Entity type Organization (Type 2)

Legal business name Oa Labs Clinic LLC.

Practice address 6321 Fairview Ave Ste B, Westmont, IL, 60559

Phone (630) 235-0220

Fax (985) 370-2321

Enumeration date Feb 16, 2018

Last updated in NPPES Jun 16, 2018

Taxonomy & classification

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License 336070137 (IL) Primary

Authorized official

Name Nicholas Mataragas

Title Director of Medicine

Phone (630) 235-0220

Other identifiers

Identifier	Type	State	Issuer
H63416	Medicaid	IL	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Oa Labs Clinic LLC.?

The NPI for Oa Labs Clinic LLC. is 1538669510, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Oa Labs Clinic LLC.?

NPPES lists Nicholas Mataragas (Director of Medicine) as the authorized official for this organization.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-06-16.