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CHELSEA RYBAK
NPI 1396397055
Behavior Analyst in Worcester, MA

Active since July 12, 2019
345A GREENWOOD ST, WORCESTER, MA 01607(508) 363-0200 Get Directions Write a Review

NPPES record last updated: April 16, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 16, 2026, Jul 12, 2019 (2 updates tracked since 2019).

About Chelsea Rybak NPPES

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

CHELSEA RYBAK (NPI 1396397055) is an individual behavior analyst provider in Worcester, Massachusetts and active in the NPI registry since July 2019.

NPPES Registry Identity

NPI1396397055
Entity TypeIndividualFemale
Primary Taxonomy103K00000X
Provider Legal NameCHELSEA RYBAK
Location Address345A GREENWOOD STWorcester, MA 01607-1753
Mailing Address345a Greenwood StWorcester, MA 01607-1753
Phone(508) 363-0200
Sole ProprietorNo
Enumeration DateJuly 12, 2019
Last NPPES UpdateApril 16, 20262 updates tracked since enumeration
NPPES CertifiedApril 16, 2026
✔ NPI 1396397055 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyBehavior AnalystBehavioral Health & Social Service Providers
Taxonomy Code103K00000X
Definition
A behavior analyst is qualified by at least a master's degree and Behavior Analyst Certification Board certification and/or a state-issued credential (such as a license) to practice behavior analysis independently. Behavior analysts provide the required supervision to assistant behavior analysts and behavior technicians. A behavior analyst delivers services consistent with the dimensions of applied behavior analysis. Common services may include, but are not limited to, conducting behavioral assessments, analyzing data, writing and revising behavior-analytic treatment plans, training others to implement components of treatment plans, and overseeing implementation of treatment plans.
345A GREENWOOD ST, Worcester, MA 01607
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Other Names 1

Former Name (1)Chelsea Demayo

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Providence Health Plan.Insurance ›

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.

EFRAIN VAZQUEZ
Behavior Technician
345A GREENWOOD ST
WORCESTER, MA 01607
Worcester County (508) 363-0200
SHIRIN S RAD
Developmental Therapist
345A GREENWOOD ST, SUITE B
WORCESTER, MA 01607
Worcester County (508) 933-1878
ALYSSA WHALEN
Behavior Technician
345A GREENWOOD ST
WORCESTER, MA 01607
Worcester County (508) 363-0200
STEPHANIE NUBUOR
Behavior Technician
345A GREENWOOD ST
WORCESTER, MA 01607
Worcester County (508) 363-0200
KATHERINE LYN SLOM 101Y00000X
Counselor
345A GREENWOOD ST
WORCESTER, MA 01607
Worcester County (508) 363-0200
AMAIRANYS RODRIGUEZ-CABAN
Developmental Therapist
345A GREENWOOD ST
WORCESTER, MA 01607
Worcester County (508) 363-0200
AMY SILVA
Behavior Technician
345A GREENWOOD ST
WORCESTER, MA 01607
Worcester County (866) 727-8274
DONNA NGUYEN
Behavior Technician
345A GREENWOOD ST
WORCESTER, MA 01607
Worcester County (508) 363-0200

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 Chelsea Rybak's NPI number?

The NPI number for Chelsea Rybak is 1396397055. It was assigned to this individual provider in the NPPES registry on July 12, 2019. The provider is also known as Chelsea Demayo.

Where is Chelsea Rybak located?

Chelsea Rybak practices at 345A Greenwood St, Worcester, MA 01607. The listed phone number is (508) 363-0200.

What is Chelsea Rybak's specialty?

The primary specialty registered for this NPI is Behavior Analyst with taxonomy code 103K00000X.

What insurance does Chelsea Rybak accept?

Health plans from Anthem Blue Cross and Blue Shield and Providence Health Plan list Chelsea Rybak as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Chelsea Rybak was last updated on April 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.