Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mackenzie Caroline Langdon, DO

Student in an Organized Health Care Education/Training Program in Indianapolis, IN · enumerated 2023.

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

National Provider Identifier

1437854049

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Registry record

Entity type Individual (Type 1)

Name Dr. Mackenzie Caroline Langdon

Credential DO

Sex Female

Practice address 355 W 16th St Ste 4700, Indianapolis, IN, 46202

Phone (317) 948-5450

Enumeration date Apr 3, 2023

Last updated in NPPES Apr 3, 2023

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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 1437854049 active?

Yes, as of the latest NPPES snapshot, NPI 1437854049 is active (record last updated 2023-04-03).

How do I verify Mackenzie Langdon's NPI record?

Cross-check NPI 1437854049 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-04-03.