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

MR. GORDON CHARLES SIEK PHD
NPI 1730705476
Pathology - Clinical Laboratory Director, Non-physician in Belmont, MA

Q: What is Gordon Siek's NPI number?

The NPI number for Gordon Siek is 1730705476. It was assigned to this individual provider in the NPPES registry on June 18, 2020.

Q: What is Gordon Siek's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Clinical Laboratory Director, Non-physician, with taxonomy code 247ZC0005X.

Q: When was this NPI record last updated?

The NPPES record for Gordon Siek was last updated on August 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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 June 18, 2020

11 CLARENDON RD, BELMONT, MA 02478(857) 523-0154 Get Directions Write a Review

NPPES record last updated: August 3, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 3, 2026, Jun 18, 2020 (2 updates tracked since 2020).

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About Mr. Gordon Charles Siek Phd NPPES

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

MR. GORDON CHARLES SIEK PHD (NPI 1730705476) is an individual clinical laboratory director, non-physician in Belmont, Massachusetts and active in the NPI registry since June 2020.

NPPES Registry Identity

NPI1730705476

Entity TypeIndividualMale

Primary Taxonomy247ZC0005X

Provider Legal NameMR. GORDON CHARLES SIEKCredential: PHD

Location Address11 CLARENDON RDBelmont, MA 02478-3719

Mailing Address11 Clarendon RdBelmont, MA 02478-1723 · (857) 523-0154

Phone(857) 523-0154

Sole ProprietorNo

Enumeration DateJune 18, 2020

Last NPPES UpdateAugust 3, 20262 updates tracked since enumeration

NPPES CertifiedAugust 3, 2026

✔ NPI 1730705476 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Clinical Laboratory Director, Non-physicianTechnologists, Technicians & Other Technical Service Providers

Taxonomy Code247ZC0005X

Definition

An individual who is state-licensed as a clinical laboratory director and meets the qualifications in the Clinical Laboratory Improvement Amendments of 1988 for non-physicians (non-MD/DO) as defined in the CFR 42 Part 493.1405.

11 CLARENDON RD, Belmont, MA 02478

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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 Gordon Siek's NPI number?

The NPI number for Gordon Siek is 1730705476. It was assigned to this individual provider in the NPPES registry on June 18, 2020.

Where is Gordon Siek located?

Gordon Siek practices at 11 Clarendon Rd, Belmont, MA 02478. The listed phone number is (857) 523-0154.

What is Gordon Siek's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Clinical Laboratory Director, Non-physician, with taxonomy code 247ZC0005X.

When was this NPI record last updated?

The NPPES record for Gordon Siek was last updated on August 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.