Nelson Chao, MD

Addiction Medicine · Internal Medicine · Allergy & Immunology · Pulmonology

21+ years in practiceNPI: 1619974896Licensed in CT

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Credentials & Recognition

Specialties

Addiction MedicineInternal MedicineAllergy & ImmunologyPulmonology

NPI sub-specialties

Internal Medicine, Pulmonary Disease207RP1001X

Internal Medicine207R00000X

Allergy & Immunology207K00000X

Practice Signals

Editorial signals beyond credentials. Patient transparency over opacity. See methodology.

Mid-Level (PA/NP) Use

Doctor-led visits

Google Reviews

4.4 / 5.0

14 reviews

Years in Practice

21+ years

Estimated from NPI enumeration date

Featured in PBCMMG Rankings

#1

Top Allergists & Immunologists in Connecticut, 2026

Allergy & Immunology · Connecticut · 2026

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Frequently Asked Questions about Dr. Nelson Chao, MD

Where does Dr. Nelson Chao, MD practice?+
Dr. Nelson Chao, MD practices in Connecticut, CT. 4 CORPORATE DR SUITE 268 SHELTON, CT 064846211.
What is Dr. Nelson Chao, MD's phone number?+
Dr. Nelson Chao, MD's practice phone is 203-402-0377. Office contact information is verified on the PBCMMG profile.
What does Dr. Nelson Chao, MD specialize in?+
Dr. Nelson Chao, MD's primary specialty is Addiction Medicine, with additional focus on Internal Medicine, Allergy & Immunology, Pulmonology.
Is Dr. Nelson Chao, MD board certified?+
Board certification status for Dr. Nelson Chao, MD has not been verified in the data sources PBCMMG uses (ABMS, state medical boards). The PBCMMG profile shows their current credential set.
How long has Dr. Nelson Chao, MD been practicing?+
Dr. Nelson Chao, MD has been in active practice for 21+ years, based on NPI enumeration and state licensing records.
What is Dr. Nelson Chao, MD's NPI number?+
Dr. Nelson Chao, MD's National Provider Identifier (NPI) is 1619974896, registered in the federal NPPES registry.

Profile maintained by Palm Beach County Medical Media Group, Inc. | Data verified from public registries (NPPES, ABMS, state medical boards). Methodology · Editorial Standards

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