William N Barker, ACNP

Nurse practitioner in Longview, Texas · NPI 1457501025

William Barker is one of 195 nurse practitioners practicing in Longview, Texas. William Barker practices with Christus Trinity Clinic.

Registry record (NPPES)

NPI: 1457501025
Type: Type 1 · Individual
Primary taxonomy: Nurse Practitioner, Acute Care · 363LA2100X
Address on file: 703 E Marshall Ave
Longview, TX 75601-5500
(903) 315-4880
Enumerated: Sep 19, 2008
Record last updated: Oct 23, 2015
License states listed: TX

Medicare (CMS)

Enrollment: Medicare-enrolled in TX
Nurse Practitioner
Revalidation due: No date set by CMS

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Part D prescribing
Procedure volumes by CPT code
Group affiliations and colleagues
Full enrollment history

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Practice locations

707 E Marshall Ave
Longview, TX 75601
(903) 595-2283
707 E Marshall Ave Christus Ctc Heartandvascular Ins.
Longview, TX 75601
(903) 315-2833
PO Box Suite 846098
Dallas, TX 75284
1600 Broadway Ave
Gladewater, TX 75647
(903) 315-5630
105 Zeid Blvd
Henderson, TX 75652
(903) 595-2283
815 S Washington Ave
Marshall, TX 75670
(913) 315-4880
620 S Fleishel Ave Christus Trinity Clinic
Tyler, TX 75701
(903) 606-4900
630 S Fleishel Ave
Tyler, TX 75701
(903) 606-5560

More nurse practitioners in Longview

Updated August 2026. Practice locations and specialty come from the CMS Doctors and Clinicians file, the registry record from NPPES, and enrollment from CMS Medicare enrollment files. NPI records are corrected at the source, through NPPES.