Allison Emily Greenstein

Allison Emily Greenstein is a Behavior Technician provider (Behavior Technician) practicing in Simi Valley, CA, registered in the NPPES registry with NPI 1558845677 since 2018.

✓ Active NPI ✓ Valid NPI checksum

NPI	1558845677
Entity type	Individual (Type 1)
Name	Allison Emily Greenstein
Sex	Female
Practice address	1900 E LOS ANGELES AVE, Simi Valley, CA, 93065
Phone	8055370620
Enumeration date	2018-09-25
Last updated in NPPES	2018-09-25

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
106S00000X	Behavior Technician	Primary	—	—

Copy-ready billing details

Provider: Allison Greenstein
NPI: 1558845677
Taxonomy: 106S00000X (Behavior Technician)
Address: 1900 E LOS ANGELES AVE, Simi Valley, CA, 93065

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1225342215	Robert Nopar	Individual	Developmental - Behavioral Pediatrics Physician	Simi Valley, CA
1053652701	Penelope Erickson	Individual	Pediatric Occupational Therapist	Simi Valley, CA
1750881439	Kaitlyn Cochran	Individual	Behavior Technician	Simi Valley, CA
1689217473	Nicole Leznik	Individual	Behavior Analyst	Simi Valley, CA
1487299657	Melissa Ramirez	Individual	Behavior Analyst	Simi Valley, CA
1649802125	Amy Escobar	Individual	Behavior Technician	Simi Valley, CA
1659952455	Ryenne Jurgella	Individual	Behavior Technician	Simi Valley, CA
1215510243	Faith Ardon	Individual	Behavior Analyst	Simi Valley, CA

Verify this record

Cross-check NPI 1558845677 against the authoritative CMS record: view Allison Emily Greenstein on the official NPPES registry .

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.

Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Allison Greenstein?

Allison Greenstein is registered in NPPES with the primary taxonomy of Behavior Technician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2018-09-25.