Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Chance Loomis Irwin, MD

Individual provider Surgery Physician · NPI 1780888271

Chance Loomis Irwin, MD practises Vascular Surgery in Amarillo, Texas. Graduated from University of Texas Medical School at Houston in 2002, 24 years ago. Practices with Bsa Physicians Group Inc, a 119-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
24
Trained at
University of Texas Medical School at Houston
Licensed in
TX
In the registry since
2007
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1000 S Coulter St Ste 200
Amarillo, TX 79106-1841
Phone: (806) 212-6604
Fax: (806) 212-0355
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Vascular Surgery Physician (primary) Taxonomy 2086S0129X · Licence M0440 (TX)
Surgery Physician Taxonomy 208600000X · Licence M0440 (TX)

Record details

NPI number1780888271
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 11, 2007
Last updated in NPPESSeptember 20, 2024
Certification dateSeptember 20, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyVASCULAR SURGERY
Medical schoolUNIVERSITY OF TEXAS MEDICAL SCHOOL AT HOUSTON
Graduated 2002 (24 years in practice)
Group practice Bsa Physicians Group Inc — 119 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Hernia repair (minimally invasive) 11 times · 73rd percentile
Leg revascularization (restoring blood flow) 18 times · 71st percentile
Colonoscopy 1–10 times
Hernia repair - groin (open) 1–10 times
Removal of tissue 1–10 times
Spinal fusion 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients635
Services billed 1,128 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $760 14 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Bsa Hospital Hospital · Amarillo, TX · listed as Bsa Hospital LLC
  • Quail Creek Surgical Hospital Hospital · Amarillo, TX · listed as Physicians Surgical Hospitals, LLC
  • Southwest Medical Center Hospital · Liberal, KS
  • Northwest Texas Hospital Hospital · Amarillo, TX
  • Bsa Compassion Home Care Home health agency · Amarillo, TX

Colleagues at Bsa Physicians Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 119 clinicians in the practice; 12 are shown here.

Other providers in Amarillo