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

Matthew M McDiarmid, DO

Individual provider Internal Medicine Physician · NPI 1003234162

Matthew M McDiarmid, DO practises Interventional Cardiology in Thornton, Colorado. Graduated from Nova Southeastern College of Osteo Medicine in 2014, 12 years ago. Practices with Advanced Heart and Vein Center Inc, a 15-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Colorado and Wisconsin.

Years since qualifying
12
Trained at
Nova Southeastern College of Osteo Medicine
Licensed in
CO, WI
In the registry since
2014
Specialties on file
5
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

805 E 144th Ave Ste 100
Thornton, CO 80023-9210
Phone: (720) 772-8040
Fax: (720) 805-1551
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1906 Blake Ave, Glenwood Springs, CO 81601-4227 — (970) 945-6535

Specialties & licences

Interventional Cardiology Physician (primary) Taxonomy 207RI0011X · Licence DR.0065978 (CO)
Internal Medicine Physician Taxonomy 207R00000X · Licence 67343 (WI)
Internal Medicine Physician Taxonomy 207R00000X · Licence DR.0065978 (CO)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence DR.0065978 (CO)
Nuclear Cardiology Physician Taxonomy 207UN0901X · Licence DR.0065978 (CO)

Record details

NPI number1003234162
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 4, 2014
Last updated in NPPESMay 17, 2022
Certification dateMay 16, 2022

Medicare enrollment

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

Medicare specialtyINTERVENTIONAL CARDIOLOGY
Also practisesCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolNOVA SOUTHEASTERN COLLEGE OF OSTEO MEDICINE
Graduated 2014 (12 years in practice)
Group practice Advanced Heart And Vein Center Inc — 15 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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.

Varicose vein removal 36 times · 69th percentile
Coronary angioplasty and stenting 24 times · 56th percentile
Leg revascularization (restoring blood flow) 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 patients408
Services billed 3,643 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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 $4,226 122 payments · a meal or drink at a meeting or visit, not a fee
Travel and Lodging $3,399 14 payments · travel or lodging paid or reimbursed, such as to attend a conference
Long term medical supply or device loan $1,958 1 payment · a device or supply lent for a long period, not cash

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.

  • Hca Healthone Rose Hospital · Denver, CO · listed as HCA Healthone LLC
  • The Medical Center Of Aurora & South Hospital Hospital · Aurora, CO · listed as Medical Center of Aurora
  • Hca Healthone Mountain Ridge Hospital · Thornton, CO
  • HCA HealthOne Presbyterian St. Lukes Hospital · Denver, CO
  • Intermountain Health Platte Valley Hospital Hospital · Brighton, CO

Colleagues at Advanced Heart and Vein Center Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 15 clinicians in the practice; 7 are shown here.

Other providers in Thornton