Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Allison Margaret Saiz, MD

Q: What is the NPI number for Allison Saiz?

The National Provider Identifier (NPI) for Allison Saiz is 1174910657, a Type 1 (individual) record in the CMS NPPES registry.

Gynecologic Oncology Physician in Chicago, IL · enumerated 2015.

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

National Provider Identifier

1174910657

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Registry record

Entity type Individual (Type 1)

Name Allison Margaret Saiz

Credential MD

Sex Female

Practice address 250 E Superior St Ste 5-2175, Chicago, IL, 60611

Phone (312) 472-3970

Enumeration date Apr 22, 2015

Last updated in NPPES Dec 7, 2022

Taxonomy & licenses

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

207VX0201X Gynecologic Oncology Physician Allopathic & Osteopathic Physicians · License 036-149901 (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

Where does Allison Saiz practice?

The practice location on file with NPPES is in Chicago, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Allison Saiz?

The National Provider Identifier (NPI) for Allison Saiz is 1174910657, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-07.