Dr. Justin M. Kanoff, MD | Longmont, CO | Internist

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Dr. Justin Kanoff is a medical doctor who specializes in internal medicine and ophthalmology. He earned his medical degree from the University of Texas Southwestern Medical School and brings 19 years of clinical experience to his practice. Dr. Kanoff is fluent in both English and Spanish, allowing him to serve a diverse patient population.

Dr. Kanoff practices at multiple locations throughout Colorado, including Longmont, Lafayette, Boulder, and Greeley, with his primary hospital affiliation at Longmont United Hospital. He focuses on treating serious eye conditions such as retinal detachment, clouding that can occur after cataract surgery, and diabetic eye disease. His expertise includes performing YAG laser capsulotomy and laser treatments for diabetic retinopathy to help preserve and restore vision. Patients consistently rate him highly, giving him an average score of 4.9 out of 5 stars.

Overview based on verified provider data

accepting new patients
4.9

50 Ratings
19 years of experience
26 insurance plans accepted
speaks English, Spanish
University Of Texas Southwestern Medical School
46 written reviews
2 specialties
10 areas of expertise
2 board certifications
1 hospital affiliation
9 office locations
Male

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

Based on patient feedback. Read the reviews

Dr. Kanoff's Ratings and Reviews

4.9

50 Ratings with 46 written Reviews

Average Wait Time 18 Minutes

How was your appointment with
Dr. Kanoff?

Patients’ Perspective

Gave an accurate diagnosis: (41) Did WellNeeds Improvement (0)
Had a good bedside manner: (43) Did WellNeeds Improvement (0)
Spent time with me: (41) Did WellNeeds Improvement (1)
Provided follow-up after the visit: (30) Did WellNeeds Improvement (3)
Flexible scheduling: (31) Did WellNeeds Improvement (1)
Saw me in a timely manner: No Ratings
Staff was courteous: No Ratings

Patients consistently praise Dr. Justin Michael Kanoff for his thoroughness, professionalism, and ability to clearly communicate complex medical information. They appreciate his caring demeanor, expertise in eye care, and his willingness to address emergencies swiftly, which instills confidence in his patients. On the negative side, some patients express frustration with the scheduling process and long wait times at certain office locations. Despite these logistical issues, many still value the high-quality care and would recommend him to others.

AI-generated from the text of patient reviews

50 ratings & reviews

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Showing 1 to 10 of 46 reviews

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Dr Kanoff is great. He listens to your concerns and addresses them. I feel very comfortable knowing he knows my case.

May 5th, 2026

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A few years ago I switched to Dr. Kanoff from another doctor in the practice and have been very happy with the care I’ve received from Dr. Kanoff. He listens carefully and explains things very well and never seems rushed when I know he’s always busy. The scheduling situation can be frustrating especially in the Lafayette office but if you’re able to schedule ahead it works well.

April 21st, 2026

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Easy to get an emergency appointment, just completed my second follow up a year after incident. I’m very happy with the care and treatment provided by Dr Kanoff and his team. Dr Kanoff is very professional and explains everything that’s happening. Would definitely recommend him as a provider.

March 2nd, 2026

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Dr Knoff is very good and explains everything.

February 27th, 2026

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Dr. Kanoff is very thorough, and takes time with me to provide explanations and will clearly answer all my questions. I trust him with the health of my eyes.

February 24th, 2026

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Friendly and professional Easy to talk to! Very through

February 24th, 2026

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Dr. Kanoff is a very knowledgeable and caring physician. He takes the time to listen to my concerns and formulates a plan of care based on my needs. I know that my eye health is in good hands with Dr. Kanoff's expertise.

February 12th, 2026

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Dr. Kanoff was extremely accommodating with an eye emergency I had that required him coming in during off hours and scheduling surgery for the next morning. He was caring and professional. I felt I was in good hands. The surgery was a success and the quick action most likely saved my sight.

December 16th, 2025

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Very professional. Good bedside manner. Feel very comfortable that I’m in good hands.

December 10th, 2025

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I came to Dr. Kanoff in search of a 2nd opinion, and I in search of a provider who not only knew his stuff, but also took the time to answer my questions and treated me individually. Dr. Kanoff did not disappoint! He instantly made me feel more comfortable and confident in my decisions regarding my health care. His office and everyone working there made me feel just as comfortable. Great experience.

December 9th, 2025

Eye Care Center Of Northern Colorado Pc

1400 Dry Creek DrLongmont, CO 80503

Tel: (303) 772-3300

Mon8:00 am - 5:00 pm

Tue8:00 am - 5:00 pm

Wed8:00 am - 5:00 pm

Thu8:00 am - 5:00 pm

Fri8:00 am - 5:00 pm

SatClosed

SunClosed

Eye Care Center Of Northern Colorado Pc

300 Exempla Cir Ste 120Lafayette, CO 80026

Tel: (303) 772-3300

Mon7:30 am - 5:30 pm

Tue7:30 am - 5:30 pm

Wed7:30 am - 5:30 pm

Thu7:30 am - 5:30 pm

Fri7:30 am - 5:30 pm

SatClosed

SunClosed

Advanced Vision Surgery Center

1390 Dry Creek DrLongmont, CO 80503

Tel: (303) 682-3383

Mon7:30 am - 5:30 pm

Tue7:30 am - 5:30 pm

Wed7:30 am - 5:30 pm

Thu7:30 am - 5:30 pm

Fri7:30 am - 5:30 pm

SatClosed

SunClosed

Longmont United Hospital

1950 Mountain View AveLongmont, CO 80501

Tel: (303) 651-5111

Intermountain Health Good Samaritan Medical Center

200 Exempla CirLafayette, CO 80026

Tel: (303) 689-4000

Eye Care Center Of Northern Colorado Pc

3000 CENTER GREEN DR STE 250BOULDER, CO 80301

Mon8:00 am - 5:30 pm

Tue8:00 am - 5:30 pm

Wed8:00 am - 5:30 pm

Thu8:00 am - 5:30 pm

Fri8:00 am - 5:30 pm

SatClosed

SunClosed

Uchealth Longs Peak Hospital

1750 E Ken Pratt BlvdLongmont, CO 80504

Tel: (720) 718-7000

Banner North Colorado Medical Center

1801 16th StGreeley, CO 80631

Tel: (970) 810-4121

Eye Care Center Of Northern Colorado Pc

1616 15th StGreeley, CO 80631

Mon8:00 am - 5:00 pm

Tue8:00 am - 5:00 pm

Wed8:00 am - 5:00 pm

Thu8:00 am - 5:00 pm

Fri8:00 am - 5:00 pm

SatClosed

SunClosed


Dr. Justin Michael Kanoff, MD	Dr. Elizabeth Groff, MD	Dr. Jonathan Peterson, MD	Dr. Daniel Yee, DO
Internal Medicine	Internal Medicine	Internal Medicine	Internal Medicine
Accepts New Patients
4.9 (50 Ratings)	4.2 (5 Ratings)	0 (0 Ratings)	5 (2 Ratings)
19 Years of Experience	28 Years of Experience	34 Years of Experience
No Virtual Visit Option	No Virtual Visit Option	No Virtual Visit Option	No Virtual Visit Option
Speaks English, Spanish	Speaks English, Spanish
Longmont , CO	Westminster , CO	Westminster , CO	Arvada , CO
Med School: University Of Texas Southwestern Medical School	Med School: Perelman School Of Medicine At University Of Pennsylvania	Med School: Northwestern University The Feinberg School Of Medicine
Current Profile	View Profile	View Profile	View Profile

Search for your insurance and plan

Accepts Medicare
Accepts Medicaid
Aetna
Aetna - Medicare
AmeriGroup
Blue Cross Blue Shield
CHAMPVA - HMO
Cigna
Cigna-HealthSpring
Devoted Health
Family Health Network
Friday Health Plans
Harvard Pilgrim Health Care
HealthPartners
Humana
Humana - Medicare (Advantage HMO)
Kaiser Permanente
Medicaid - Medicaid
Medicaid - Medicaid (Managed)
Medicare
Medicare - Medicare
Meritain Health
Optum Health
Priority Health
Tricare
UnitedHealthcare
UnitedHealthcare - HMO
UnitedHealthcare - Medicare (Advantage HMO)

Blindness
Cataract
Diabetic Retinopathy
Eye Exam
Eye Pain
Glaucoma
Lasik Surgery
Macular Degeneration
Ophthalmology
Vision Issues

MEDICAL LICENSE

Medical Doctor, Colorado, 2027, Active

EDUCATION & TRAINING

Medical School

University Of Texas Southwestern Medical SchoolGraduated in 2007

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How can I make an appointment with Dr. Justin Kanoff?: You can find contact information for Dr. Justin Kanoff here on Vitals.
Is Dr. Justin Kanoff accepting new patients?: Dr. Justin Kanoff is accepting new patients on Vitals. View Dr. Justin Kanoff's profile on Vitals to make an appointment.
Which hospitals is Dr. Justin Kanoff affiliated with?: Dr. Justin Kanoff is affiliated with Longmont United Hospital.
What languages does Dr. Justin Kanoff speak?: Dr. Justin Kanoff speaks English and Spanish.
Does Dr. Justin Kanoff accept virtual/telehealth appointments?: Dr. Justin Kanoff has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.

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