DR. WILLIAM EASTON WALKER M.D.
NPI 1619242047
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Houston, TX

Q: What is William Walker's NPI number?

The NPI number for William Walker is 1619242047. It was assigned to this individual provider in the NPPES registry on March 19, 2012.

Q: What is William Walker's specialty?

The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.

Q: When was this NPI record last updated?

The NPPES record for William Walker was last updated on April 29, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 19, 2012PECOS Enrolled

2831 SACKETT ST, HOUSTON, TX 77098(713) 520-0021 Get Directions Write a Review

NPPES record last updated: April 29, 2015. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Dr. William Easton Walker M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM EASTON WALKER M.D. (NPI 1619242047) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Houston, Texas, licensed in Texas (F6158) and active in the NPI registry since March 2012. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1619242047

Entity TypeIndividualMale

Primary Taxonomy208G00000X

Provider Legal NameDR. WILLIAM EASTON WALKERCredential: M.D.

Location Address2831 SACKETT STHouston, TX 77098-1125

Mailing Address2831 Sackett StHouston, TX 77098-1125 · (713) 520-0021

Phone(713) 520-0021

Sole ProprietorYes

Enumeration DateMarch 19, 2012

Last NPPES UpdateApril 29, 2015

✔ NPI 1619242047 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyThoracic Surgery (Cardiothoracic Vascular Surgery)Allopathic & Osteopathic Physicians

Taxonomy Code208G00000X

License✔ Licensed in TX · F6158

Definition

A thoracic surgeon provides the operative, perioperative and critical care of patients with pathologic conditions within the chest. Included is the surgical care of coronary artery disease, cancers of the lung, esophagus and chest wall, abnormalities of the trachea, abnormalities of the great vessels and heart valves, congenital anomalies, tumors of the mediastinum and diseases of the diaphragm. The management of the airway and injuries of the chest is within the scope of the specialty.

Also ListedEmergency MedicineTaxonomy 207P00000X · License F6158 (TX)

2831 SACKETT ST, Houston, TX 77098

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William Easton Walker M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show William Walker reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ess Of South Texas LLC

44 mi

Emergency Medicine

1353 N TRAVIS ST
Liberty, TX 77575

Reassigned Medicare billing, Texas enrollment
199 clinicians in this Medicare group

NPI 1295128247 (936) 336-7316

Ess Of Port Lavaca LLC

106 mi

Emergency Medicine

815 N VIRGINIA ST
Port Lavaca, TX 77979

Reassigned Medicare billing, Texas enrollment
109 clinicians in this Medicare group

NPI 1922546936 (361) 552-6713

Ess Of Fairfield LLC

144 mi

Emergency Medicine

125 NEWMAN ST
Fairfield, TX 75840

Reassigned Medicare billing, Texas enrollment
76 clinicians in this Medicare group

NPI 1588132856 (866) 931-8882

Hcc Of Fairfield LLC

144 mi

Internal Medicine

125 NEWMAN ST
Fairfield, TX 75840

Reassigned Medicare billing, Texas enrollment
68 clinicians in this Medicare group

NPI 1487122750 (866) 931-8882

Southwest Medical Associates, Inc.

360 mi

Emergency Medicine

1207 S BAILEY ST
Electra, TX 76360

Reassigned Medicare billing, Texas enrollment
155 clinicians in this Medicare group

NPI 1831299122 (940) 495-3981

Emergency Staffing Solutions Of West Texas LLC

487 mi

Emergency Medicine

1900 COLLEGE AVE
Levelland, TX 79336

Reassigned Medicare billing, Texas enrollment
122 clinicians in this Medicare group

NPI 1033593504 (806) 894-4963

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77098 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$176.98 typical visit price

range $58.24 – $176.98

Typical copayment $44.24 (range $14.56 – $44.24)

Most-billed visit code 99205

Established Patient

$72.62 typical visit price

range $18.60 – $143.93

Typical copayment $18.15 (range $4.65 – $35.98)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Walker's NPI number?

The NPI number for William Walker is 1619242047. It was assigned to this individual provider in the NPPES registry on March 19, 2012.

Where is William Walker located?

William Walker practices at 2831 Sackett St, Houston, TX 77098. The listed phone number is (713) 520-0021.

What is William Walker's specialty?

The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.

Is William Walker enrolled in Medicare?

Yes. William Walker is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Walker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Walker reassigns Medicare benefits to 6 organizations: Ess Of South Texas LLC (Liberty, TX), Ess Of Port Lavaca LLC (Port Lavaca, TX), Ess Of Fairfield LLC (Fairfield, TX), Hcc Of Fairfield LLC (Fairfield, TX), Southwest Medical Associates, Inc. (Electra, TX) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Walker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Walker accept?

Health plans from Baylor Scott and White Health Plan and Blue Cross and Blue Shield of Texas list William Walker as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for William Walker was last updated on April 29, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.