Mark Stephens, MD
NPI 1407858137 · Internal Medicine Physician · Avon, CO
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Stephens, MD is a Internal Medicine Physician provider in Avon, CO (NPI 1407858137).
Provider details
- NPI number
- 1407858137
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 28631 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,550 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 494 | $80 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 298 | $9 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 245 | $44 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 234 | $10 |
| Automated Urinalysis Test81003 | 200 | $2 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 161 | $13 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 67 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 279 | 84 |
| Amlodipine Besylate | 198 | 51 |
| Levothyroxine Sodium | 189 | 59 |
| Losartan Potassium | 182 | 56 |
| Hydrochlorothiazide | 170 | 56 |
| Rosuvastatin Calcium | 169 | 56 |
| Allopurinol | 130 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-12
- Last updated
- 2023-02-08
- Certified
- 2023-02-08
Frequently asked questions
- What is Mark Stephens's NPI number?
- Mark Stephens's National Provider Identifier (NPI) is 1407858137, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Stephens's specialty?
- Mark Stephens is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Stephens located?
- Mark Stephens's practice location on file with NPPES is 50 Buck Creek Road, Avon, CO 81620.
- What is Mark Stephens's phone number?
- The practice phone number listed in the NPPES registry for Mark Stephens is (970) 926-6340.
- Does Mark Stephens accept Medicare?
- Mark Stephens is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Stephens's NPI active?
- Yes — Mark Stephens's NPI (1407858137) is active in the NPPES registry as of the last update on 2023-02-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.