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

MR. STEVEN M RIDDLE RPH
NPI 1730176058
Pharmacist - Pharmacotherapy in Seattle, WA

Active since October 03, 2005
325 9TH AVE, HMC PHARMACY MAILSTOP 359912, SEATTLE, WA 98104(206) 731-3000 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Mr. Steven M Riddle Rph NPPES

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

MR. STEVEN M RIDDLE RPH (NPI 1730176058) is an individual pharmacotherapy provider in Seattle, Washington, licensed in Washington (PH00011826) and active in the NPI registry since October 2005.

NPPES Registry Identity

NPI1730176058
Entity TypeIndividualMale
Primary Taxonomy1835P1200X
Provider Legal NameMR. STEVEN M RIDDLECredential: RPH
Location Address325 9TH AVE, HMC PHARMACY MAILSTOP 359912Seattle, WA 98104-2420
Mailing Address6309 41st Ave SwSeattle, WA 98136-1811 · (206) 409-0290
Phone(206) 731-3000
Sole ProprietorNo
Enumeration DateOctober 3, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1730176058 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPharmacist · PharmacotherapyPharmacy Service Providers
Taxonomy Code1835P1200X
License✔ Licensed in WA · PH00011826
Definition
A licensed pharmacist who has demonstrated specialized knowledge and skill in optimizing pharmacotherapeutic care of patients, by developing, implementing, monitoring, and modifying complex treatment plans, providing advanced level education and consultation, and collaborating with other health professionals in the management of therapy.
325 9TH AVE, Seattle, WA 98104
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Other Providers at the Same Location NPPES 20

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

SANDRA K WALKER ARNP
Nurse Practitioner (Acute Care)
325 9TH AVE
SEATTLE, WA 98104
King County (206) 598-0502
JULIA J VISSER DPT
Physical Therapist
325 9TH AVE, BOX 359920
SEATTLE, WA 98104
King County (206) 744-1675
GENIA J MONCADA
Pharmacist
325 9TH AVE, MAILSTOP 359912
SEATTLE, WA 98104
King County (206) 731-3219
JACQUELINE M. KIM LICSW, MSW
Social Worker (Clinical)
325 9TH AVE, BOX 359760
SEATTLE, WA 98104
King County (206) 744-8511
MS. DIANE E WHEELER MS, PA-C
Physician Assistant (Medical)
325 9TH AVE
SEATTLE, WA 98104
King County (206) 744-3000
AMELIA V. RIVERA
Physical Therapist
325 9TH AVE
SEATTLE, WA 98104
King County (206) 774-3300
TIMOTHY WILLIAM MENZA MD, PHD
Internal Medicine (Infectious Disease)
325 9TH AVE
SEATTLE, WA 98104
King County (206) 520-5000
DEMETRIOS TEREZAKIS
Occupational Therapist
325 9TH AVE
SEATTLE, WA 98104
King County (206) 744-6112

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 Steven Riddle's NPI number?

The NPI number for Steven Riddle is 1730176058. It was assigned to this individual provider in the NPPES registry on October 3, 2005.

Where is Steven Riddle located?

Steven Riddle practices at 325 9th Ave Hmc Pharmacy Mailstop 359912, Seattle, WA 98104. The listed phone number is (206) 731-3000.

What is Steven Riddle's specialty?

The primary specialty registered for this NPI is Pharmacist, specializing in Pharmacotherapy, with taxonomy code 1835P1200X.

When was this NPI record last updated?

The NPPES record for Steven Riddle 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 25 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.