DermatologistIndex

Catherine Xie, MD, PhD

Dermatologist in New Haven, CT

Registered providerLicense # listed (CT)

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Public-record details

Address
20 York St, New Haven, CT 06510
Phone
(203) 688-4242
Listed under
Individual clinicians
NPI
1780334821
NPI status
Active in the NPPES registry
Provider type
Individual provider
Registered specialty (self-reported taxonomy)
Dermatology (207N00000X)
Credentials listed
MD, PhD
License number on NPI record
84117 (CT)
NPI first issued
Mar 23, 2022
Years since NPI first issued
4 years (since 2022)
License state on NPI record
CT
NPI record last updated
Apr 15, 2026
Other practice locations (NPPES)
1: Waterbury, CT
Other dermatology listings at this street address
11

NPI 1780334821 is active in the federal NPPES registry (CMS) with Dermatology as its self-reported primary taxonomy; license 84117 (CT) is listed on the record. Source: NPPES NPI Registry (CMS) (record). Data as of 2026-10-16.

Public record, not an endorsement. This listing was compiled from public records as of 2026-10-16 and may be incomplete or out of date. Dermatologist Index does not vet, employ, recommend or guarantee dermatology practices; a badge reflects only what the public record showed on that date. Confirm current details with the official record before you decide. The information on Dermatologist Index is not medical advice and does not replace a doctor, nurse, discharge planner or other qualified professional. Do not use it to make decisions about diagnosis or treatment. If you have a medical emergency, call 911. Full disclaimer · Report an error

What these registry facts mean

The NPI (National Provider Identifier) is the federal ID every HIPAA-covered provider uses to bill insurance. This NPI belongs to an individual clinician. The specialty is the taxonomy the provider chose when registering; NPPES does not check it. A license number here is what the provider entered — confirm it with the state board before you rely on it. A registered specialty is not board certification. To check board certification, use the American Board of Dermatology's verification tool (or the American Osteopathic Board of Dermatology for DOs), and confirm the medical license with the state board.

View NPI 1780334821 in the official registry ↗

Practices and clinicians at this address

Other listings in this directory whose NPI record gives the same street address and ZIP. A shared address usually means a shared practice or building; it does not by itself show who works with whom.

Registered specialty is not board certification. Verify the license with the state medical board and board certification with the American Board of Dermatology or the American Osteopathic Board of Dermatology. Ask whether the practice takes your insurance or Medicare plan before you book.

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