Mark Twardowski, DO
NPI 1437118387 · Family Medicine Physician · Grand Junction, CO
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Twardowski, DO is a Family Medicine Physician provider in Grand Junction, CO (NPI 1437118387).
Provider details
- NPI number
- 1437118387
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 31690 (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
2,375 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 | 795 | $128 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 477 | $16 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 223 | $9 |
| Hemoglobin A1c Level83036 | 214 | $9 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 162 | $129 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 107 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 594 | 159 |
| Lisinopril | 475 | 129 |
| Levothyroxine Sodium | 332 | 81 |
| Amlodipine Besylate | 324 | 81 |
| Tamsulosin Hcl | 224 | 57 |
| Metformin Hcl | 209 | 55 |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-20
- Last updated
- 2023-03-07
- Certified
- 2021-10-01
Frequently asked questions
- What is Mark Twardowski's NPI number?
- Mark Twardowski's National Provider Identifier (NPI) is 1437118387, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Twardowski's specialty?
- Mark Twardowski is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Twardowski located?
- Mark Twardowski's practice location on file with NPPES is 743 Horizon Ct, Grand Junction, CO 81506-8701.
- What is Mark Twardowski's phone number?
- The practice phone number listed in the NPPES registry for Mark Twardowski is (970) 241-7600.
- Does Mark Twardowski accept Medicare?
- Mark Twardowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Twardowski's NPI active?
- Yes — Mark Twardowski's NPI (1437118387) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.