Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARSDEN SCOTT BLOIS IV MD
NPI 1215938683
Internal Medicine - Advanced Heart Failure and Transplant Cardiology in Boulder, CO

Q: What is Marsden Blois's NPI number?

The NPI number for Marsden Blois is 1215938683. It was assigned to this individual provider in the NPPES registry on August 9, 2005. The provider is also known as Scott Blois MD.

Q: What is Marsden Blois's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Advanced Heart Failure and Transplant Cardiology, with taxonomy code 207RA0001X.

Q: When was this NPI record last updated?

The NPPES record for Marsden Blois was last updated on July 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since August 09, 2005PECOS Enrolled

4743 ARAPAHOE AVE, STE 201, BOULDER, CO 80303(303) 442-2395(303) 442-1073 Get Directions Write a Review

NPPES record last updated: July 17, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 17, 2026, Feb 6, 2026, Nov 9, 2017 and 2 more (5 updates tracked since 2016).

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About Marsden Scott Blois Iv Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARSDEN SCOTT BLOIS IV MD (NPI 1215938683) is an individual advanced heart failure and transplant cardiology provider in Boulder, Colorado, licensed in Colorado (DR.0034464) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, maintains a secondary practice location in Longmont, and is a graduate of Baylor College Of Medicine (1993).

NPPES Registry Identity

NPI1215938683

Entity TypeIndividualMale

Primary Taxonomy207RA0001X

Provider Legal NameMARSDEN SCOTT BLOIS IVCredential: MD

Location Address4743 ARAPAHOE AVE, STE 201Boulder, CO 80303-1113

Mailing Address1760 E Ken Pratt Blvd Ste 205Longmont, CO 80504-5311 · (720) 718-8180 · Fax (720) 718-5989

Phone(303) 442-2395

Fax(303) 442-1073

Sole ProprietorNo

Medical School CMSBaylor College Of MedicineGraduated 1993

Enumeration DateAugust 9, 2005

Last NPPES UpdateJuly 17, 20265 updates tracked since enumeration

NPPES CertifiedJuly 17, 2026

✔ NPI 1215938683 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Advanced Heart Failure and Transplant CardiologyAllopathic & Osteopathic Physicians

Taxonomy Code207RA0001X

License✔ Licensed in CO · DR.0034464

Definition

Specialists in Advanced Heart Failure and Transplant Cardiology would participate in the inpatient and outpatient management of patients with advanced heart failure across the spectrum from consideration for high-risk cardiac surgery, cardiac transplantation, or mechanical circulatory support, to pre-and post-operative evaluation and management of patients with cardiac transplants and mechanical support devices, and end-of-life care for patients with end-stage heart failure.

Also ListedInternal Medicine · Cardiovascular DiseaseTaxonomy 207RC0000X · License DR.0034464 (CO), J7308 (TX)

4743 ARAPAHOE AVE, Boulder, CO 80303

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Other Names 1

Other Name (5)Scott Blois Md

Secondary Practice Location 1

Location 11760 E Ken Pratt Blvd Ste 205Longmont, CO 80504-5311 · Phone (720) 718-8180 · Fax (720) 718-5989

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marsden Scott Blois Iv Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4880683077

PECOS Enrollment IDI20150914002390

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 17

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

674 services402 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

486 services422 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

397 services392 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

91 services91 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

56 services32 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician 93016

An exercise or drug-induced heart stress test with ECG involves monitoring your heart's activity while it's under stress, either from exercise or medication. A doctor supervises the entire procedure to ensure safety and accuracy in results. This test helps detect heart problems.

49 services49 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician 93018

An exercise or drug-induced heart stress test with ECG is a procedure to assess how your heart functions under stress. It can involve exercising or medication to make your heart work harder while an ECG records its activity. A physician reviews the results.

49 services49 patients

Heart rhythm review and interpretation of continous external ekg over 8-15 days 93248

This service involves wearing a device for 8-15 days that continuously records your heart's electrical activity. It helps in identifying irregular heart rhythms. The recorded data is then reviewed and interpreted by a healthcare professional for any abnormalities.

35 services35 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

31 services26 patients

Transitional care management services for problem of at least moderate complexity 99495

Transitional care management services focus on coordinating and managing your care after you leave the hospital. For moderate complexity problems, this involves managing your medications, arranging further treatments, and ensuring you have the necessary follow-ups.

27 services25 patients

Ultrasound of heart, follow-up 93308

A follow-up ultrasound of the heart, also known as an echocardiogram, is a non-invasive test that uses sound waves to create images of your heart. It helps doctors monitor your heart's function and structures after initial assessment or treatment.

24 services24 patients

Test for exercise-induced heart and lung stress 94621

This is a test to evaluate how your heart and lungs respond to physical exertion. You'll exercise on a treadmill or a stationary bike, while your heart rate, breathing, blood pressure, and fatigue levels are monitored. This helps identify any abnormal responses to physical activity.

19 services19 patients

Heart muscle strain imaging 93356

Heart muscle strain imaging is a non-invasive test that uses sound waves to create pictures of your heart. It helps doctors evaluate how well your heart muscle is working and detect any damage or disease. This can aid in diagnosing heart conditions and guiding treatment plans.

16 services15 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

16 services16 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

13 services13 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

12 services12 patients

Ultrasound of heart with probe in esophagus, with report 93312

This procedure, called a transesophageal echocardiogram, uses a small probe passed into your esophagus to capture detailed images of your heart. The report provides information about your heart's structure and function.

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80303 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$132.55 typical visit price

range $58.06 – $174.82

Typical copayment $33.13 (range $14.51 – $43.70)

Most-billed visit code 99204

Established Patient

$102.03 typical visit price

range $18.88 – $142.79

Typical copayment $25.50 (range $4.72 – $35.69)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MELISSA LOCHER ACNP

Nurse Practitioner (Acute Care)

4743 ARAPAHOE AVE, SUITE 201
BOULDER, CO 80303

Boulder County (303) 442-2395

ALPINE UROLOGY, PLLC

Specialist

4743 ARAPAHOE AVE, SUITE104
BOULDER, CO 80303

Boulder County (303) 444-9000

FOOTHILLS SURGERY CENTER, LLC

Clinic/Center (Ambulatory Surgical)

4743 ARAPAHOE AVE, STE 101
BOULDER, CO 80303

Boulder County (303) 435-7161

DR. CHARLES GRAHAM JONES MD

Surgery

4743 ARAPAHOE AVE, SUITE 100
BOULDER, CO 80303

Boulder County (303) 443-2123

MONI BANERJEE PA

Physician Assistant (Medical)

4743 ARAPAHOE AVE, SUITE 201
BOULDER, CO 80303

Boulder County (303) 442-2395

TIMOTHY A ORINGER P.A.

Physician Assistant

4743 ARAPAHOE AVE, SUITE 201
BOULDER, CO 80303

Boulder County (303) 442-2395

JOHN CHRISTOPHER KEFER MD PHD

Urology

4743 ARAPAHOE AVE, SUITE 104
BOULDER, CO 80303

Boulder County (303) 444-9000

DR. KARA DAWN BEASLEY D.O.

Neurological Surgery

4743 ARAPAHOE AVE, SUITE 202
BOULDER, CO 80303

Boulder County (303) 938-5700

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marsden Blois's NPI number?

The NPI number for Marsden Blois is 1215938683. It was assigned to this individual provider in the NPPES registry on August 9, 2005. The provider is also known as Scott Blois MD.

Where is Marsden Blois located?

Marsden Blois practices at 4743 Arapahoe Ave Ste 201, Boulder, CO 80303. The listed phone number is (303) 442-2395.

What is Marsden Blois's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Advanced Heart Failure and Transplant Cardiology, with taxonomy code 207RA0001X.

Is Marsden Blois enrolled in Medicare?

Yes. Marsden Blois is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Marsden Blois was last updated on July 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.