Dr. Catherine J. Marmillo, MD | Steamboat Springs, CO | Emergency Medicine

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Dr. Marmillo graduated from the University of Rochester School of Medicine & Dentistry in 2015. She works in Steamboat Springs, CO and 3 other locations and specializes in Emergency Medicine and Family Medicine. Dr. Marmillo is affiliated with Hca Healthone Aurora and Uchealth Yampa Valley Medical Center.

accepting new patients
5

10 Ratings
11 years of experience
University Of Rochester School Of Medicine & Dentistry
10 written reviews
2 specialties
2 areas of expertise
2 hospital affiliations
4 office locations
Female

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me

Based on patient feedback. Read the reviews

Dr. Marmillo's Ratings and Reviews

5

10 Ratings with 10 written Reviews

Average Wait Time 12 Minutes

How was your appointment with
Dr. Marmillo?

Patients’ Perspective

Gave an accurate diagnosis: (9) Did WellNeeds Improvement (0)
Had a good bedside manner: (9) Did WellNeeds Improvement (0)
Spent time with me: (9) Did WellNeeds Improvement (0)
Provided follow-up after the visit: (6) Did WellNeeds Improvement (0)
Flexible scheduling: (6) Did WellNeeds Improvement (0)
Saw me in a timely manner: No Ratings
Staff was courteous: No Ratings

Patients consistently praise Dr. Marmillo for her attentive and thorough approach, noting her ability to explain medical terms in understandable language and provide thoughtful advice. Her personable demeanor and keen listening skills leave patients feeling heard and well-cared for. Many appreciate her comprehensive methods and her capability to diagnose problems efficiently, setting up further tests and appointments as needed. Overall, reviews do not indicate any significant negative feedback, highlighting a generally positive patient experience with Dr. Marmillo.

AI-generated from the text of patient reviews

10 ratings & reviews

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Showing 1 to 10 of 10 reviews

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My first visit with Dr. Marmillo confirmed the stellar reviews I’d read on her on WebMD, Rater8, and Vitals. She asked several questions and provided high-value guidance that I’m enthusiastically now pursuing. I highly recommend her.

May 7th, 2026

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I used Dr. Marmillo last year prior to moving full time to Steamboat and found her easy to work with and very thorough. Presented this week with a more complex issue and really appreciated her thoughtful and thorough approach.

March 11th, 2026

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Very personable, explains findings in layman’s terms.

March 11th, 2026

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Dr. Marmillo was kind, attentive and took her time during the appointment. I would absolutely recommend her!

March 9th, 2026

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Five stars is an insult; this doctor deserves a constellation

January 19th, 2026

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Dr Marmillo is very easy to talk to and listens intently, and translates all the medical terms into language that I can understand before referring me to other medical professionals to help with each of my problems , and makes me understand what is going on. Dr Marmillo and her team have me in my best shape in years! Very friendly, welcoming, supportive

September 1st, 2025

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Dr Marmillo listens to me and discusses my health needs. I have been her patient for a couple of years and I highly recommend her.

July 10th, 2025

1 person found this helpful

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Dr Marmillo is outstanding. She diagnosed my problem quickly, arranged for ultrasound testing the same day, and set me up with a superb surgeon. Steamboat Springs is lucky to have her.

July 10th, 2025

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She was easy to talk to and I feel like she listened to what I was saying.

July 10th, 2025

1 person found this helpful

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Excellent. She’s a very good listener and follows up on everything that is needed.

July 10th, 2025

1 person found this helpful

Yampa Valley Medical Associates Pc

940 Central Park Dr Ste 100Steamboat Springs, CO 80487

Tel: (970) 879-3327

Mon8:00 am - 5:00 pm

Tue7:00 am - 6:00 pm

Wed8:00 am - 5:00 pm

Thu8:00 am - 5:00 pm

Fri7:00 am - 5:00 pm

SatClosed

SunClosed

Dr. Catherine Josephine Marmillo

2018 Montrose StPhiladelphia, PA 19146

Tel: (484) 406-5828

Uchealth Yampa Valley Medical Center

1024 Central Park DrSteamboat Springs, CO 80487

Tel: (970) 879-1322

High Plains Community Health Center

201 Kendall DrLamar, CO 81052

Tel: (719) 336-0261

Mon8:00 am - 8:00 pm

Tue8:00 am - 8:00 pm

Wed8:00 am - 8:00 pm

Thu8:00 am - 8:00 pm

Fri8:00 am - 5:00 pm

Sat8:00 am - 5:00 pm

SunClosed


Dr. Catherine Josephine Marmillo, MD	Christopher Carleo, MD	Dr. Laura Ann Sehnert, MD	Kathryn Elsanne Perkins
Emergency Medicine	Emergency Medicine	Emergency Medicine	Nurse Practitioner
Accepts New Patients	Accepts New Patients
5 (10 Ratings)	4.3 (3 Ratings)	3.7 (6 Ratings)	0 (0 Ratings)
11 Years of Experience	28 Years of Experience	23 Years of Experience
No Virtual Visit Option	Virtual Visit Available	No Virtual Visit Option	No Virtual Visit Option
	Speaks English		Speaks English
Steamboat Springs , CO	East Setauket , NY	Steamboat Springs , CO	Steamboat Springs , CO
Med School: University Of Rochester School Of Medicine & Dentistry	Med School: Suny Stony Brookhealth	Med School: University Of Colorado School Of Medicine
Current Profile	View Profile	View Profile	View Profile

Search for your insurance and plan

Accepts Medicare
Accepts Medicaid

Family Medicine
General Practice

MEDICAL LICENSE

Medical Doctor, Colorado, 2027, Active

EDUCATION & TRAINING

Medical School

University Of Rochester School Of Medicine & DentistryGraduated in 2015

Hannah Marie Meyer
Nurse Practitioner
| Craig, CO
(0)
Heather Duke Hack
Nurse Practitioner
| STEAMBOAT SPRINGS, CO
(0)
Elizabeth Faye Kirt
Nurse Practitioner
| Edina, MN
(0)
Dr. Mark Edward Mccaulley, MD
Internal Medicine
47 Years Exp | Steamboat Springs, CO
(1)
Dr. Catherine Cantway, MD
Family Medicine
12 Years Exp | Holyoke, CO
(0)
Dr. Rosanne Kay Iversen, MD
Family Medicine
37 Years Exp | Steamboat Springs, CO
(6)
Dr. Louise Ann Thielen, MD
Internal Medicine
39 Years Exp | Steamboat Springs, CO
(0)
Dr. Debra Drengenberg, MD
Family Medicine
30 Years Exp | Steamboat Springs, CO
(17)
Dr. Carlos Arturo Ortiz, MD
Emergency Medicine
23 Years Exp | Steamboat Springs, CO
(2)
Dr. David John Cionni, MD
Emergency Medicine
40 Years Exp | Steamboat Springs, CO
(2)

Where is Dr. Catherine Marmillo's office located?: Dr. Catherine Marmillo's office is located at 940 Central Park Dr Ste 100, Steamboat Springs, CO, 80487.
How can I make an appointment with Dr. Catherine Marmillo?: You can find contact information for Dr. Catherine Marmillo here on Vitals.
Which hospitals is Dr. Catherine Marmillo affiliated with?: Dr. Catherine Marmillo is affiliated with Hca Healthone Aurora and Uchealth Yampa Valley Medical Center.
Does Dr. Catherine Marmillo accept my insurance?: You can see the insurance plans that Dr. Catherine Marmillo accepts on their Vitals profile.
Does Dr. Catherine Marmillo accept virtual/telehealth appointments?: Dr. Catherine Marmillo has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.

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