Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ashley-Ann Assia Walker, MD

Urology Physician in Chicago, IL · enumerated 2025.

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

National Provider Identifier

1104711530

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Registry record

Entity type Individual (Type 1)

Name Dr. Ashley-Ann Assia Walker

Credential MD

Sex Female

Practice address 600 S Paulina St, Chicago, IL, 60612

Phone (312) 942-3589

Enumeration date Jun 9, 2025

Last updated in NPPES Jul 31, 2025

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 125086690 (IL) Primary

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

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 specialty is Ashley-Ann Walker?

Ashley-Ann Walker is registered in NPPES with the primary taxonomy of Urology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-31.