Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Ian D Kleinhen MD Pllc

Q: What is the NPI number for Ian D Kleinhen MD Pllc?

The NPI for Ian D Kleinhen MD Pllc is 1669939369, a Type 2 (organization) record in the CMS NPPES registry.

Internal Medicine Physician in Windsor, CT · enumerated 2019 · authorized official Ian Kleinhen, Physician / Owner.

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

National Provider Identifier

1669939369

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Registry record

Entity type Organization (Type 2)

Legal business name Ian D Kleinhen MD Pllc

Practice address 74 Mack St Ste 1, Windsor, CT, 06095

Phone (860) 580-7071

Fax (860) 298-0279

Enumeration date Feb 28, 2019

Last updated in NPPES Mar 12, 2019

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Ian Kleinhen

Title Physician / Owner

Phone (860) 580-7071

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

Who is the authorized official for Ian D Kleinhen MD Pllc?

NPPES lists Ian Kleinhen (Physician / Owner) as the authorized official for this organization.

What is the NPI number for Ian D Kleinhen MD Pllc?

The NPI for Ian D Kleinhen MD Pllc is 1669939369, a Type 2 (organization) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-03-12.