NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karen Holstein

Behavior Technician in Thurmont, MD · enumerated 2018 · practices at Applied Behavior and Learning Consultants, LLC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1841779295

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Karen Holstein
Sex Female
Practice address 6504 Mountaindale Rd, Thurmont, MD, 21788
Phone (443) 243-7647
Enumeration date Aug 7, 2018
Last updated in NPPES Aug 7, 2018

Taxonomy & licenses

106S00000X Behavior Technician Behavioral Health & Social Service Providers Primary

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 → Validate an NPI →

Frequently asked questions

Is NPI 1841779295 active?
Yes, as of the latest NPPES snapshot, NPI 1841779295 is active (record last updated 2018-08-07).
How do I verify Karen Holstein's NPI record?
Cross-check NPI 1841779295 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-08-07.