William Marsh, MD

Gastroenterology · Ophthalmology · Allergy & Immunology

20+ years in practiceNPI: 1568422343Licensed in NH

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Credentials & Recognition

Specialties

GastroenterologyOphthalmologyAllergy & Immunology

NPI sub-specialties

Ophthalmology207W00000X

Practice Signals

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

Mid-Level (PA/NP) Use

Doctor-led visits

Google Reviews

4.3 / 5.0

6 reviews

Years in Practice

20+ years

Estimated from NPI enumeration date

Featured in PBCMMG Rankings

#4

Top Ophthalmologists in New Hampshire, 2026

Ophthalmology · New Hampshire · 2026

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Frequently Asked Questions about Dr. William Marsh, MD

Where does Dr. William Marsh, MD practice?+
Dr. William Marsh, MD practices in Colorado, CO. 10 CENTER STREET WOLFEBORO, NH 03894.
What is Dr. William Marsh, MD's phone number?+
Dr. William Marsh, MD's practice phone is 603-569-1550. Office contact information is verified on the PBCMMG profile.
What does Dr. William Marsh, MD specialize in?+
Dr. William Marsh, MD's primary specialty is Gastroenterology, with additional focus on Ophthalmology, Allergy & Immunology.
Is Dr. William Marsh, MD board certified?+
Board certification status for Dr. William Marsh, 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. William Marsh, MD been practicing?+
Dr. William Marsh, MD has been in active practice for 20+ years, based on NPI enumeration and state licensing records.
What is Dr. William Marsh, MD's NPI number?+
Dr. William Marsh, MD's National Provider Identifier (NPI) is 1568422343, 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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