NPI age
20 years
Enumerated 2005-08-10
● Active
Type 1 · Individual
DR. Oscar Jack Chastain III, MD
Chastain is 1 of 5 thoracic surgery (cardiothoracic vascular surgery) providers in Longview and 1 of 602 in Texas.
Primary specialty
Thoracic Surgery (Cardiothoracic Vascular Surgery)
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2023-12-19
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 602 active thoracic surgery (cardiothoracic vascular surgery) providers in Texas.
NPI age
20 years
≈ at median (19 yr)
State licenses
1 state
20% of peers hold multiple states
Subspecialties
0
41% of peers hold subspecialties
NPI lifetime · 2005 → 2026
2005-08Enumerated in NPPES
2005
2026
Where they practice
Practice location
701 E Marshall Ave, Suite 504
Longview, TX 756015659
Mailing address
Po Box 4207
Longview, TX 756064207
Additional practice locations
3 secondary locations on file with NPPES.
Location 2
705 E Marshall Ave Ste 5001
Longview, TX 756015524
Location 3
707 E Marshall Ave
Longview, TX 756015545
Location 4
703 E Marshall Ave Ste 5008
Longview, TX 756015557
Specialties
-
Thoracic Surgery (Cardiothoracic Vascular Surgery) PrimaryA 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,...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 043391401 |
Practice context
Part of a multi-provider practice. 18 other active providers share this practice address in NPPES.
Provyx · Custom healthcare lists
Need all 602 Thoracic Surgery (Cardiothoracic Vascular Surgery) providers in Texas?
Get the full list as a CSV with verified work emails, direct phones, and LinkedIn URLs.
Request a quote →How to verify this provider
- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.