Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Aileen Portugal, MD

Obstetrics & Gynecology Physician in Saint Louis, MO · enumerated 2019 · practices at Washington University.

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

National Provider Identifier

1821559113

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Registry record

Entity type Individual (Type 1)

Name Dr. Aileen Portugal

Credential MD

Sex Female

Practice address 4444 Forest Park Ave, Div Ob Reproductive Endocrinology, Ste 3100, Saint Louis, MO, 63108

Phone (314) 286-2400

Fax (314) 286-2455

Enumeration date Mar 28, 2019

Last updated in NPPES Apr 17, 2025

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 2023025245 (MO) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
200125703	Medicaid	MO	-

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 Aileen Portugal?

Aileen Portugal is registered in NPPES with the primary taxonomy of Obstetrics & Gynecology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-17.