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

ETHAN ALTMARK
NPI 1326858465
Behavior Analyst in Indianapolis, IN

Q: What is Ethan Altmark's NPI number?

The NPI number for Ethan Altmark is 1326858465. It was assigned to this individual provider in the NPPES registry on January 10, 2025.

Q: What is Ethan Altmark's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Ethan Altmark was last updated on September 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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 January 10, 2025

1440 E 46TH ST, INDIANAPOLIS, IN 46205(317) 918-2689 Get Directions Write a Review

NPPES record last updated: September 10, 2026. Verified against the NPPES registry weekly; last sync: September 20, 2026.

Record update history: Sep 10, 2026, Jan 10, 2025 (2 updates tracked since 2025).

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About Ethan Altmark NPPES

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

ETHAN ALTMARK (NPI 1326858465) is an individual behavior analyst provider in Indianapolis, Indiana, licensed in Indiana (1-26-86952) and active in the NPI registry since January 2025.

NPPES Registry Identity

NPI1326858465

Entity TypeIndividualMale

Primary Taxonomy103K00000X

Provider Legal NameETHAN ALTMARK

Location Address1440 E 46TH STIndianapolis, IN 46205-2021

Mailing Address7425 Westfield BlvdIndianapolis, IN 46240-3056

Phone(317) 918-2689

Sole ProprietorNo

Enumeration DateJanuary 10, 2025

Last NPPES UpdateSeptember 10, 20262 updates tracked since enumeration

NPPES CertifiedSeptember 10, 2026

✔ NPI 1326858465 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyBehavior AnalystBehavioral Health & Social Service Providers

Taxonomy Code103K00000X

License✔ Licensed in IN · 1-26-86952

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.

Also ListedBehavior TechnicianTaxonomy 106S00000X

1440 E 46TH ST, Indianapolis, IN 46205

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Other Providers at the Same Location NPPES 18

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

MEGHAN BRAMSTEDT MA, BCBA

Behavior Analyst