Kevin Sieja, M.D.
NPI 1952356677 · Gastroenterology Physician · Denver, CO
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kevin Sieja, M.D. is a Gastroenterology Physician provider in Denver, CO (NPI 1952356677).
Provider details
- NPI number
- 1952356677
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 44150 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
223 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 47 | $247 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 44 | $129 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 34 | $164 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 31 | $99 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 23 | $133 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg 3350/Sod Sulf,chlr/Pot/Magbrand: Suflave | 274 | 269 |
| Omeprazole | 205 | 62 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 88 | 88 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 58 | 57 |
| Pantoprazole Sodium | 45 | 12 |
| Mesalamine | 42 | — |
| Esomeprazole Magnesium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,885 across 82 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 50 Buck Creek Rd Ste 200Avon, CO 81620-5428Phone: (970) 926-6340
- 180 S Frontage Rd W Ste 5800Vail, CO 81657-5038Phone: (970) 926-6340
Registry dates
- Enumerated
- 2006-05-23
- Last updated
- 2024-12-24
- Certified
- 2024-12-19
Frequently asked questions
- What is Kevin Sieja's NPI number?
- Kevin Sieja's National Provider Identifier (NPI) is 1952356677, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kevin Sieja's specialty?
- Kevin Sieja is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Kevin Sieja located?
- Kevin Sieja's practice location on file with NPPES is 1960 Ogden St, Denver, CO 80218-1022.
- What is Kevin Sieja's phone number?
- The practice phone number listed in the NPPES registry for Kevin Sieja is (303) 861-0808.
- Does Kevin Sieja accept Medicare?
- Kevin Sieja is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kevin Sieja's NPI active?
- Yes — Kevin Sieja's NPI (1952356677) is active in the NPPES registry as of the last update on 2024-12-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.