Vivian T Diahn

Vivian T Diahn is a Contractor provider (Contractor) practicing in Spring, TX, registered in the NPPES registry with NPI 1841633377 since 2013.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1841633377
Entity type	Individual (Type 1)
Name	Vivian T Diahn
Sex	Female
Practice address	Spring, TX, 77373
Phone	2817239442
Fax	8777734140
Enumeration date	2013-04-15
Last updated in NPPES	2013-04-15

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

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
171W00000X	Contractor	Primary	—	—

Copy-ready billing details

Provider: Vivian Diahn
NPI: 1841633377
Taxonomy: 171W00000X (Contractor)
Address: Spring, TX, 77373

Verify this record

Cross-check NPI 1841633377 against the authoritative CMS record: view Vivian T Diahn on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Vivian Diahn?

Vivian Diahn is registered in NPPES with the primary taxonomy of Contractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2013-04-15.