Michael P. Siegenthaler, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Longview, TX
Michael P. Siegenthaler, MD is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Longview, Texas, and NPI 1093863532, issued on Jan 8, 2007. Check the license (Texas L2653, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Michael P. Siegenthaler
- Credential
- MD
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License numbers
- L2653 TX
036842 CT
D0068474 MD
MD430302 PA
Self-reported in NPPES; status is on the state search - Practice location
- 705 E Marshall Ave, Longview, TX 75601
- Phone
- (903) 315-2777
- Enumerated
- Jan 8, 2007
- Record last updated
- Mar 25, 2026
- Medicaid ID
- 415096100 MD
- Medicare enrollment
- Enrolled (PECOS I20260316001179); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 484 in Texas → Look up another NPI →
Also registered at 705 E Marshall Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kayla Bryant, AGACNP-BCAcute Care Nurse Practitioner1265279434
- James Dozier, MDObstetrics & Gynecology Physician1457533101
- Rebecca Hough, MDPediatrics Physician1891773040
- Sheli Kipp, NPWomen's Health Clinical Nurse Specialist1396704748
- Louis Kirk, MDObstetrics & Gynecology Physician1356318042
- Leigh Klein, WHNPObstetrics & Gynecology Nurse Practitioner1487981452
Verify Michael P. Siegenthaler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license L2653Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
30 Medicare Part D claims for 15 beneficiaries, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D.
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: $1,037.65
20 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, 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 4 group practices
- Christus Trinity ClinicTyler, TX
- Mercy Health Physicians Springfield Specialty Care LLCSpringfield, OH
- Monument Health Rapid City Hospital IncRapid City, SD
- University OF Connecticut Health CenterFarmington, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael P. Siegenthaler among 484 thoracic surgery (cardiothoracic vascular surgery) physician records in Texas
Michael P. Siegenthaler, 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 2007, is newer than 55% of them.
- NPI issued2007 · 55% of these records are older, 35% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1991 · median 1996 among the 309 with a school on file
- Record last updated2026 · 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
- Oscar Chastain, MDLongview, TX 756011285635409
- Obieze Nwanna-Nzewunwa, MBBS, MSLongview, TX 756011558868380
- 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 Michael P. Siegenthaler, MD's NPI number?
Michael P. Siegenthaler, MD's National Provider Identifier (NPI) is 1093863532, issued on Jan 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Michael P. Siegenthaler, MD located?
The NPPES record lists a practice address at 705 E Marshall Ave, Longview, TX, 75601. Phone: (903) 315-2777. Providers update this record themselves, so call before visiting.
How can I verify Michael P. Siegenthaler, MD's license?
NPPES lists Texas license number L2653, 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 Michael P. Siegenthaler, MD prescribe under Medicare Part D?
In 2024, Michael P. Siegenthaler, MD had 30 Medicare Part D claims for 15 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.