Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. HAROLD RAY DIAMOND D.D.S.
NPI 1417917469
Dentist - General Practice in Seattle, WA

Q: What is Harold Diamond's NPI number?

The NPI number for Harold Diamond is 1417917469. It was assigned to this individual provider in the NPPES registry on March 24, 2006.

Q: What is Harold Diamond's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Q: When was this NPI record last updated?

The NPPES record for Harold Diamond was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 43 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.

Active since March 24, 2006

3203 W MCGRAW ST, STE. 201, SEATTLE, WA 98199(206) 283-0964(206) 283-0964 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

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About Dr. Harold Ray Diamond D.d.s. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. HAROLD RAY DIAMOND D.D.S. (NPI 1417917469) is an individual general practice provider in Seattle, Washington, licensed in Washington (3924) and active in the NPI registry since March 2006.

NPPES Registry Identity

NPI1417917469

Entity TypeIndividualMale

Primary Taxonomy1223G0001X

Provider Legal NameDR. HAROLD RAY DIAMONDCredential: D.D.S.

Location Address3203 W MCGRAW ST, STE. 201Seattle, WA 98199-3236

Mailing Address3203 W Mcgraw St, Ste. 201Seattle, WA 98199-3236 · (206) 283-0964 · Fax (206) 283-0964

Phone(206) 283-0964

Fax(206) 283-0964

Sole ProprietorNo

Enumeration DateMarch 24, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1417917469 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers

Taxonomy Code1223G0001X

License✔ Licensed in WA · 3924

Definition

A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.

3203 W MCGRAW ST, Seattle, WA 98199

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Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ERAN J. GUTKIN DMD PS

Clinic/Center (Dental)

3203 W MCGRAW ST, SUITE 201
SEATTLE, WA 98199

King County (206) 283-0964

SARAH LOUISE WARE FELDMAN LMP

Massage Therapist

3203 W MCGRAW ST, SUITE 202
SEATTLE, WA 98199

King County (206) 283-9860

TINA LOUISE BERG LMP

Massage Therapist

3203 W MCGRAW ST, SUITE 202
SEATTLE, WA 98199

King County (206) 283-9860

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 Harold Diamond's NPI number?

The NPI number for Harold Diamond is 1417917469. It was assigned to this individual provider in the NPPES registry on March 24, 2006.

Where is Harold Diamond located?

Harold Diamond practices at 3203 W Mcgraw St Ste. 201, Seattle, WA 98199. The listed phone number is (206) 283-0964.

What is Harold Diamond's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

When was this NPI record last updated?

The NPPES record for Harold Diamond was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 43 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.