Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Don Shannon Callens, MD

Family Medicine Physician in Liberty, TX · enumerated 2007.

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

National Provider Identifier

1528285079

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Registry record

Entity type Individual (Type 1)

Name Don Shannon Callens

Credential MD

Sex Male

Practice address 720 Travis, Liberty, TX, 77575

Phone (936) 336-6439

Fax (936) 336-8870

Enumeration date Apr 19, 2007

Last updated in NPPES Sep 4, 2009

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License M3952 (TX) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
11818883	Other	TX	CAQH
8F0993	Other	TX	BC/BS
202747601	Medicaid	TX	-
8AW040	Other	TX	BC/BS
M39952	Other	TX	LICENSE

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 1528285079 active?

Yes, as of the latest NPPES snapshot, NPI 1528285079 is active (record last updated 2009-09-04).

How do I verify Don Callens's NPI record?

Cross-check NPI 1528285079 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-09-04.