Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mrs. Carissa Welton Niemerg

Developmental Therapist in Effingham, IL · enumerated 2020.

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

National Provider Identifier

1457984460

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Registry record

Entity type Individual (Type 1)

Name Mrs. Carissa Welton Niemerg

Sex Female

Practice address Effingham, IL, 62401

Phone (618) 322-6918

Enumeration date Feb 18, 2020

Last updated in NPPES Feb 18, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

222Q00000X Developmental Therapist Respiratory, Developmental, Rehabilitative and Restorative 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

How do I verify Carissa Niemerg's NPI record?

Cross-check NPI 1457984460 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1457984460 active?

Yes, as of the latest NPPES snapshot, NPI 1457984460 is active (record last updated 2020-02-18).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-18.