DR. GREGORY WALTER GUYMAN DDS, MSD
NPI 1245138171
Dentist - Orthodontics and Dentofacial Orthopedics in Mercer Island, WA
About Dr. Gregory Walter Guyman Dds, Msd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GREGORY WALTER GUYMAN DDS, MSD (NPI 1245138171) is an individual orthodontics and dentofacial orthopedics provider in Mercer Island, Washington, licensed in Washington (4741) and active in the NPI registry since October 2026.
NPPES Registry Identity
Specialties & Licenses
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Gregory Guyman's NPI number?
The NPI number for Gregory Guyman is 1245138171. It was assigned to this individual provider in the NPPES registry on October 29, 2026.
Where is Gregory Guyman located?
Gregory Guyman practices at 6203 SE 30th St, Mercer Island, WA 98040. The listed phone number is (206) 919-2514.
What is Gregory Guyman's specialty?
The primary specialty registered for this NPI is Dentist, specializing in Orthodontics and Dentofacial Orthopedics, with taxonomy code 1223X0400X.
When was this NPI record last updated?
The NPPES record for Gregory Guyman was last updated on October 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.