Marsden Blois, MD
Advanced Heart Failure and Transplant Cardiology Physician · Boulder, CO
Marsden Blois, MD is an advanced heart failure and transplant cardiology physician with a practice address in Boulder, Colorado, and NPI 1215938683, issued on Aug 9, 2005. Check the license on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Marsden Blois
- Credential
- MD
- Primary taxonomy
- Advanced Heart Failure and Transplant Cardiology Physician 207RA0001X
- Practice location
- 4743 Arapahoe Ave, Boulder, CO 80303
- Phone
- (303) 442-2395
- Enumerated
- Aug 9, 2005
- Entity
- Type 1 · individual
Also registered at 4743 Arapahoe Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alex Ashton, PACSurgical Physician Assistant1982643599
- Moni Banerjee, PAMedical Physician Assistant1164551727
- Kara Beasley, D.O.Neurological Surgery Physician1255588190
- Akinlolu Beckley, M.D.Surgery Physician1659339828
- Eric Busch, PACSurgical Physician Assistant1346289956
- James Clark, MDSpecialist1902908593
Verify Marsden Blois in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
2.8 times the Medicare Part D claims of the average advanced heart failure and transplant cardiology physician in 2024
5,319 Medicare Part D claims for 620 beneficiaries, against an average of 1,916 among the 507 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Jardiance511 claims
- Metoprolol Succinate468 claims
- Atorvastatin Calcium454 claims
- Spironolactone422 claims
- Carvedilol305 claims
- Torsemide305 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $14.40
1 payment, mostly food and beverage; the largest payer was Atricure, Inc.. The 459 providers of this specialty with any payment received $6,448.24 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital or facility affiliation
- Poudre Valley Medical Group LLCBoulder, CO
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Advanced Heart Failure and Transplant Cardiology Physician providers in Colorado
There are 7 advanced heart failure and transplant cardiology physician records in Colorado.
Other advanced heart failure and transplant cardiology physician records in Colorado
- Amrut Ambardekar, MDAurora, CO1700975042
- Ira Dauber, MDLittleton, CO1760402655
- Aaron Emmons, M.D.Wheat Ridge, CO1275876922
- Prateeti Khazanie, M.D.Aurora, CO1518147313
- Ryan Martin, M.D.Denver, CO1700103868
- Jeffrey Xie, MDAurora, CO1437710340
Common questions
What is Marsden Blois, MD's NPI number?
Marsden Blois, MD's National Provider Identifier (NPI) is 1215938683, issued on Aug 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Marsden Blois, MD located?
The NPPES record lists a practice address at 4743 Arapahoe Ave, Boulder, CO, 80303. Phone: (303) 442-2395. Providers update this record themselves, so call before visiting.
How can I verify Marsden Blois, MD's license?
Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marsden Blois, MD prescribe under Medicare Part D?
In 2024, Marsden Blois, MD had 5,319 Medicare Part D claims for 620 beneficiaries; the average among advanced heart failure and transplant cardiology physician prescribers was 1,916. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.