Oscar Jack Chastain, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Longview, TX
Oscar Jack Chastain, MD is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Longview, Texas, and NPI 1285635409, issued on Aug 10, 2005. Check the license (Texas F6524, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Oscar Jack Chastain
- Credential
- MD
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License number
- F6524 TX
Self-reported in NPPES; status is on the state search - Practice location
- 701 E Marshall Ave, Longview, TX 75601
- Phone
- (903) 315-2777
- Enumerated
- Aug 10, 2005
- Record last updated
- Dec 19, 2023
- Fax
- (903) 315-2771
- Medicaid ID
- 043391401 TX
- Medicare enrollment
- Enrolled (PECOS I20100729000536); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 1980
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 484 in Texas → Look up another NPI →
Also registered at 701 E Marshall Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Thomas Bell, AGACNP-BCAcute Care Nurse Practitioner1548632516
- Carissa Gunathilaka, LPCProfessional Counselor1316396682
- Billy Hughes, M.D.Gastroenterology Physician1851337935
- Perry Lewis, M.D.Gastroenterology Physician1831135912
- Leigh Mahjoobi, FNPFamily Nurse Practitioner1427362300
- Olusola Olofinlade, M.D.Gastroenterology Physician1093750531
Verify Oscar Jack Chastain in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license F6524Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
89 Medicare Part D claims for 68 beneficiaries, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D. 53 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen33 claims
- Cilostazol11 claims
- Tramadol Hcl11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $35.44
2 payments; by number, the most common kind was food and beverage; the largest payer was W. L. Gore & Associates, Inc. The 4,047 providers of this specialty with any payment received $7,828.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Christus Trinity ClinicTyler, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Oscar Jack Chastain among 484 thoracic surgery (cardiothoracic vascular surgery) physician records in Texas
Oscar Jack Chastain, MD is one of 484 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in Texas. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1980 · median 1996 among the 309 with a school on file
- Record last updated2023 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208G00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in Texas
There are 484 thoracic surgery (cardiothoracic vascular surgery) physician records in Texas.
All 484 in Texas → Every provider in Longview → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Obieze Nwanna-Nzewunwa, MBBS, MSLongview, TX 756011558868380
- Michael Siegenthaler, MDLongview, TX 756011093863532
- James Harrell, MDLongview, TX 756051235194069
- David Jayakar, M.D.Longview, TX 756051417911660
- Augusto Cuellar, M.D.Texarkana, TX 755031376516153
- Thomas Hoang, MDTexarkana, TX 755031730143975
- Harry Kourlis, MDTexarkana, TX 755031902865678
- Ghulam Abbas, MDTyler, TX 757011003887407
Common questions
What is Oscar Jack Chastain, MD's NPI number?
Oscar Jack Chastain, MD's National Provider Identifier (NPI) is 1285635409, issued on Aug 10, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Oscar Jack Chastain, MD located?
The NPPES record lists a practice address at 701 E Marshall Ave, Longview, TX, 75601. Phone: (903) 315-2777. Providers update this record themselves, so call before visiting.
How can I verify Oscar Jack Chastain, MD's license?
NPPES lists Texas license number F6524, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Oscar Jack Chastain, MD prescribe under Medicare Part D?
In 2024, Oscar Jack Chastain, MD had 89 Medicare Part D claims for 68 beneficiaries; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.