NPI Portal NPI Lookup & Verification

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

Allison Asako Tsambarlis, M.D.

Obstetrics & Gynecology Physician in Chicago, IL · enumerated 2013 · practices at Alivio Medical Center, Inc..

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

National Provider Identifier

1225478191

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Registry record

Entity type Individual (Type 1)
Name Allison Asako Tsambarlis
Credential M.D.
Sex Female
Practice address Chicago, IL, 60608
Enumeration date Jun 25, 2013
Last updated in NPPES Sep 13, 2019

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

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 125066024 (IL) Secondary
282E00000X Long Term Care Hospital Hospitals · License 4301103685 (MI) Secondary
207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 036143806 (IL) 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
036143806 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.

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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 Allison Tsambarlis?
Allison Tsambarlis 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 2019-09-13.