Quick answers
- Does Marsden S. Blois Iv accept Medicare assignment?
- Yes. Medicare's clinician data says Marsden S. Blois Iv accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Marsden S. Blois Iv see?
- In 2024, CMS data shows 1,021 Original Medicare patients and 2,085 services for Marsden S. Blois Iv. This counts Original Medicare only and measures volume, not quality.
- What is Marsden S. Blois Iv's NPI number?
- 1215938683. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Marsden S. Blois Iv, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 1,021 |
|---|---|
| Services billed to Medicare | 2,085 |
| Different services or procedures | 28 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)674 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)486 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)409 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)91 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)56 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure70%
- Ischemic heart disease55%
- Arthritis46%
- Atrial fibrillation39%
- Heart failure36%
Hospitals where Marsden S. Blois Iv works
Medicare's Facility Affiliation Data lists Marsden S. Blois Iv at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Boulder Community HealthBoulder, CO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 060027
- Longs Peak HospitalLongmont, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060128
- Medical Center of the RockiesLoveland, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060119
- Poudre Valley HospitalFort Collins, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060010
- UCHealth Greeley HospitalGreeley, CO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 060131
Practice locations
Addresses where Marsden S. Blois Iv is enrolled with Medicare (CMS data updated October 2, 2026).
- 2970 Arapahoe RdLafayette, CO 80026 (303) 460‑6010
Group practices
Medicare enrollment lists Marsden S. Blois Iv as a member of this group (CMS data updated October 2, 2026).
- Poudre Valley Medical Group LLC2,440 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Colorado →
Other cardiologists in Lafayette
Clinicians with the same Medicare primary specialty in Lafayette, CO — not a recommendation.
Other clinicians in Poudre Valley Medical Group LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Baylor College Of Medicine |
| Graduation year | 1993 (33 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1215938683 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians