Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Kevin Sieja, MD

Individual provider Gastroenterology Physician · NPI 1952356677

Kevin Sieja, MD is a Gastroenterology in Denver, Colorado. Qualified in 2000, 26 years ago. Practices with Colorado Gastroenterology Prof LLC, a 4-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Colorado.

Years since qualifying
26
Licensed in
CO
In the registry since
2006
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

4500 E 9th Ave Ste 720S
Denver, CO 80220-3926
Phone: (303) 355-3525
Fax: (303) 355-0255
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 50 Buck Creek Rd Ste 200, Avon, CO 81620-5428 — (970) 926-6340
  • 180 S Frontage Rd W Ste 5800, Vail, CO 81657-5038 — (970) 926-6340

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 44150 (CO)

Record details

NPI number1952356677
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 23, 2006
Last updated in NPPESJune 30, 2026
Certification dateJune 30, 2026
Mailing address4500 E 9th Ave Ste 720s, Denver, CO 80220-3926

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolOTHER
Graduated 2000 (26 years in practice)
Group practice Colorado Gastroenterology Prof Llc — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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