Walter Ryan, DO

Allergy & Immunology

21+ years in practiceNPI: 1073503843Licensed in FLLicensed in NH

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Credentials & Recognition

Specialties

Allergy & Immunology

NPI sub-specialties

Allergy & Immunology207K00000X

Internal Medicine, Allergy & Immunology207RA0201X

Practice Signals

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

Mid-Level (PA/NP) Use

Doctor-led visits

Years in Practice

21+ years

Estimated from NPI enumeration date

Featured in PBCMMG Rankings

#3

Top Allergists & Immunologists in New Hampshire, 2026

Allergy & Immunology · New Hampshire · 2026

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Frequently Asked Questions about Dr. Walter Ryan, DO

Where does Dr. Walter Ryan, DO practice?+
Dr. Walter Ryan, DO practices in Florida, FL. 2300 SOUTHWOOD DR NASHUA, NH 030631818.
What is Dr. Walter Ryan, DO's phone number?+
Dr. Walter Ryan, DO's practice phone is 603-577-4000. Office contact information is verified on the PBCMMG profile.
What does Dr. Walter Ryan, DO specialize in?+
Dr. Walter Ryan, DO's primary specialty is Allergy & Immunology.
Is Dr. Walter Ryan, DO board certified?+
Board certification status for Dr. Walter Ryan, DO 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. Walter Ryan, DO been practicing?+
Dr. Walter Ryan, DO has been in active practice for 21+ years, based on NPI enumeration and state licensing records.
What is Dr. Walter Ryan, DO's NPI number?+
Dr. Walter Ryan, DO's National Provider Identifier (NPI) is 1073503843, 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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