Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Katherine Kar-Hwee Quan, M.D.

MOHS-Micrographic Surgery Physician in Chandler, AZ · enumerated 2005 · practices at East Valley Dermatology Center.

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

National Provider Identifier

1629051917

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Registry record

Entity type Individual (Type 1)

Name Dr. Katherine Kar-Hwee Quan

Credential M.D.

Sex Female

Practice address 1100 S Dobson Rd Ste 223, Chandler, AZ, 85286

Phone (480) 821-8888

Fax (480) 821-0888

Enumeration date Nov 21, 2005

Last updated in NPPES Dec 30, 2020

Taxonomy & licenses

207ND0101X MOHS-Micrographic Surgery Physician Allopathic & Osteopathic Physicians · License 25345 (AZ) Primary

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 25345 (AZ) Secondary

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
385551	Medicaid	AZ	-
070011301	Other	AZ	RAILROAD MEDICARE
86080015085259A375	Other	AZ	TRIWEST
41-2054293	Other	AZ	TAX-ID

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 Katherine Quan?

Katherine Quan is registered in NPPES with the primary taxonomy of MOHS-Micrographic Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Rosemary Geary Dermatology Physician · Chandler, AZ NPI 1467431668 East Valley Dermatology Center Dermatology Physician · Chandler, AZ NPI 1366529836 Michelle Jeffries Pediatric Dermatology Physician · Chandler, AZ NPI 1669703286 Amanda Lamanna Physician Assistant · Chandler, AZ NPI 1205117751 Cassandra Shore Medical Physician Assistant · Chandler, AZ NPI 1982958682 Jacob Gaare Physician Assistant · Chandler, AZ NPI 1265108740

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-30.