Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Aaron Guercio, M.D.

Surgery Physician in Denver, CO · enumerated 2010.

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

National Provider Identifier

1649581638

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Registry record

Entity type Individual (Type 1)

Name Aaron Guercio

Credential M.D.

Sex Male

Practice address 1960 Ogden St, Suite 400, Denver, CO, 80218

Phone (303) 318-1540

Fax (303) 318-2481

Enumeration date Jun 24, 2010

Last updated in NPPES Oct 8, 2015

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License M-12932 (ID) 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 Aaron Guercio?

Aaron Guercio is registered in NPPES with the primary taxonomy of Surgery 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 2015-10-08.