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GREG SIERRA
NPI 1841442084
Specialist in Norwalk, CA

Active since October 21, 2008
12440 FIRESTONE BLVD STE 3020, NORWALK, CA 90650(562) 864-7821 Get Directions Write a Review

NPPES record last updated: October 21, 2008. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Greg Sierra NPPES

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

GREG SIERRA (NPI 1841442084) is an individual specialist in Norwalk, California and active in the NPI registry since October 2008.

NPPES Registry Identity

NPI1841442084
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameGREG SIERRA
Location Address12440 FIRESTONE BLVD STE 3020Norwalk, CA 90650-9328
Mailing Address12440 Firestone Blvd Ste 3020Norwalk, CA 90650-9328 · (562) 864-7821 · Fax (562) 864-7864
Phone(562) 864-7821
Sole ProprietorNo
Enumeration DateOctober 21, 2008
✔ NPI 1841442084 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
12440 FIRESTONE BLVD STE 3020, Norwalk, CA 90650
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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.

CYNTHIA M TORRES
Licensed Psychiatric Technician
12440 FIRESTONE BLVD STE 3020
NORWALK, CA 90650
Los Angeles County (562) 864-7821
MISS JASMINE AGUIRRE
Case Manager/Care Coordinator
12440 FIRESTONE BLVD STE 3020
NORWALK, CA 90650
Los Angeles County (562) 864-7821
SUNNY DAYS HOSPICE CARE INC
Hospice Care, Community Based
12440 FIRESTONE BLVD STE 3020
NORWALK, CA 90650
Los Angeles County (818) 646-1100
RICKY TODD
Community Health Worker
12440 FIRESTONE BLVD STE 3020
NORWALK, CA 90650
Los Angeles County (562) 864-7821
DR. NATALIA PAULA KOMPEL-REINFELD PSY.D.
Psychologist
12440 FIRESTONE BLVD STE 3020
NORWALK, CA 90650
Los Angeles County (562) 929-6688
MARY WILKINS
Community Health Worker
12440 FIRESTONE BLVD STE 3020
NORWALK, CA 90650
Los Angeles County (562) 215-8437
CHEUK PO WU
Student in an Organized Health Care Education/Training Program
12440 FIRESTONE BLVD STE 3020
NORWALK, CA 90650
Los Angeles County (562) 864-7821
MCKENNA RACHELLE GILBERT
Case Manager/Care Coordinator
12440 FIRESTONE BLVD STE 3020
NORWALK, CA 90650
Los Angeles County (562) 864-7821

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 Greg Sierra's NPI number?

The NPI number for Greg Sierra is 1841442084. It was assigned to this individual provider in the NPPES registry on October 21, 2008.

Where is Greg Sierra located?

Greg Sierra practices at 12440 Firestone Blvd Ste 3020, Norwalk, CA 90650. The listed phone number is (562) 864-7821.

What is Greg Sierra's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

When was this NPI record last updated?

The NPPES record for Greg Sierra was last updated on October 21, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years 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.