Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Maritza Yesenia Estrada-O'Brien

Family Medicine Physician in Mendota, IL · enumerated 2019.

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

National Provider Identifier

1184187767

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Registry record

Entity type Individual (Type 1)

Name Maritza Yesenia Estrada-O'Brien

Sex Female

Practice address Mendota, IL, 61342

Phone (815) 538-7200

Enumeration date Apr 10, 2019

Last updated in NPPES May 10, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 036.158388 (IL) Primary

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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Maritza Estrada-O'Brien?

Maritza Estrada-O'Brien is registered in NPPES with the primary taxonomy of Family Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-10.