Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Peggy Liao, MD

Dermatology Physician in Denver, CO · enumerated 2006 · practices at Denver Skin Clinic, P.C.

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

National Provider Identifier

1699799379

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Registry record

Entity type Individual (Type 1)

Name Peggy Liao

Credential MD

Sex Female

Practice address 2200 E 18th Ave, Denver, CO, 80206

Phone (303) 322-7789

Fax (303) 805-7732

Enumeration date Jul 27, 2006

Last updated in NPPES Dec 2, 2011

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 43533 (CO) 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
85558052	Medicaid	CO	-
016756	Other	CO	KAISER COMMERCIAL NUMBER

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

Is NPI 1699799379 active?

Yes, as of the latest NPPES snapshot, NPI 1699799379 is active (record last updated 2011-12-02).

How do I verify Peggy Liao's NPI record?

Cross-check NPI 1699799379 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Denver Skin Clinic, P.C Dermatology Physician · Denver, CO NPI 1992824197

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-12-02.