Colleen A. Keegan, DO

Colleen A. Keegan, DO

5.0 
2025 ratings  Read Reviews
Northwestern Medicine logoNorthwestern Medicine Regional Medical Group

Primary Specialty

Dermatology

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Practice Focus Areas

This medical professional has a particular interest or expertise in:

Reasons to Schedule a Visit

This medical professional may be a good choice for you if you are looking for care for any of the following:

  • Acne (adult or teenager)
  • Bacterial skin infection (cellulitis)
  • Blisters (pemphigus)
  • Bug bites
  • Cyst or abscess
  • Dark skin patches (melasma)
  • Eczema (dry, itchy or bumpy skin)
  • Genital concerns, male
  • Genital conditions, female
  • Hair follicle that is inflamed or infected (folliculitis)
  • Hair loss (alopecia)
  • Hidradenitis suppurativa
  • History of melanoma
  • Inflamed cyst (swollen, red or painful cyst)
  • Itchy, peeling or red skin
  • Mole or lesion evaluation
  • Mole that is bleeding
  • Nail evaluation
  • Noncancerous skin tumor (seborrheic keratosis)
  • Psoriasis
  • Rash
  • Redness or flushing of face (rosacea)
  • Scar tissue (keloid)
  • Skin allergies or hives
  • Skin cancer concern
  • Skin color loss (vitiligo)
  • Skin complications from radiation or chemo (cancer treatments)
  • Skin dark spots (hyperpigmentation)
  • Skin exam for full body
  • Skin fungus
  • Skin immune systems conditions (sarcoidosis, granuloma, morphea, scleroderma)
  • Skin inflammation (atopic/contact dermatitis)
  • Skin tag removal
  • Sun spots (actinic keratosis)
  • Sweating excessively (hyperhidrosis)
  • Viral skin infection (molluscum)
  • Warts

Education

Medical Education:
DO, Midwestern University Chicago College of Osteopathic Medicine - 1986
Internship:
Prime Midwest GME Consortium - 1987
Residency:
Cook County Health and Hospitals System - 1990

Board Certifications

  • American Board of Dermatology - Dermatology (Certified)

Practice Groups and Affiliations

Medical Group:
Northwestern Medicine Regional Medical Group
Alignment Category:
Northwestern Medicine Physician Network
On Medical Staff At:
Central DuPage Hospital
Delnor Hospital

Ratings and Reviews

At Northwestern Medicine, our patient’s feedback is important to us. While different care providers have their own unique strengths, we strive to be as transparent as possible with our quality of care.

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Overall Rating

5.0
5.0 

2025 Ratings

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Reviews from Patients

100 Most Recent Reviews

Reviews from Patients

Sort By Newest
100 Most Recent Reviews

February 18, 2026

5.0

Dr Keegan is very knowledgeable and always has great advice. She has a caring manner.

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February 17, 2026

5.0

Dr. Keegan is a wonderful doctor! She is very friendly, knowledgeable, professional, and compassionate. She is the very best!

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February 17, 2026

5.0

Dr Keegan is awesome.

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February 17, 2026

5.0

Excellent. Professional. Devoted.

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February 17, 2026

5.0

Professional, friendly, knowledgeable

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February 10, 2026

5.0

Dr. Keegan is extremely knowledgeable and a perfectionist in her field. She is compassionate and caring. Her expertise has helped me a great deal.

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February 10, 2026

5.0

Dr Keegan is always kind, thorough in her exam, and never makes me feel rushed.

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February 10, 2026

5.0

Very kind and helpful. Took great care of me!

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February 08, 2026

5.0

She's the best and knowledgeable...

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February 08, 2026

5.0

Dr. Keegan is very attentive and knowledgeable.It's obvious that she cares about her patients.

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February 03, 2026

5.0

She is very pleasant.

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February 02, 2026

5.0

She has been my doctor for many years and my visits have always been very lprofessional.

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January 31, 2026

5.0

One of best doctors i have.

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January 29, 2026

5.0

Dr Keegan is why I come here

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January 28, 2026

5.0

Love dr Keegan! She cares About her patients.

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January 28, 2026

5.0

Dr Keegan is an exceptional Dr. She is friendly kind and is interested in listening and understanding patients concerns. Dr Keegan is proactive in communicating and responding to questions about symptoms and discussing various treatment options. In my experience Dr Keegan treats the whole patient which I appreciate. Her whole practice is very organized and specific in the way that they assist their patients.

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January 28, 2026

5.0

She's absolutely wonderful. Such a kind doctor.

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January 27, 2026

5.0

She is one of the most thorough and knowledgeable dermatologists I have ever been to.

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January 27, 2026

5.0

Dr Keegan is kind, professional, and is sincerely interested and concerned about my health. She is a good listener regarding my concerns and questions. I highly recommend her.

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January 26, 2026

5.0

She is very kind and takes time to make you feel comfortable.

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January 21, 2026

5.0

Dr Keegan is professional and very knowledgeable

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January 14, 2026

5.0

Personable and thorough!

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January 13, 2026

5.0

She's the best!

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January 13, 2026

5.0

Dr Keegan is very thorough.

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January 11, 2026

5.0

She is kind and attentive.

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December 22, 2025

5.0

Dr. Keegan is wonderful. She is pleasant while working on you, and she makes you feel comfortable. Great medical care!

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December 19, 2025

5.0

Dr. Keegan is very kind, thoughtful and caring. I also feel that she is very knowledgeable and addresses any questions or concerns I have asked her.

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December 18, 2025

5.0

As it was my first visit, I'd like to see her a few more times before a 10 rating! I felt she was very thorough and explained things as she went along. She was acquainted with my previous dermatologist, who had retired.

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December 17, 2025

5.0

Very thorough exam.

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December 17, 2025

5.0

Very thorough and professional.

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December 16, 2025

5.0

Dr Keegan and the staff are caring and knowledgeable.

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December 15, 2025

5.0

Best !!!

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December 15, 2025

5.0

Very patient explains everything

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December 15, 2025

5.0

She is very thorough and knowledgeable.

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December 14, 2025

5.0

Dr Keegan is an extremely good doctor. She cares about her patients, provides thorough exams and answers my questions. I am especially grateful to her for this appointment as she noticed that my hands and feet were showing possible signs of too much vitamin A in my body and ordered a lab test to check for that.

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December 10, 2025

5.0

Stretches to make her schedule work to fit patients in.

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December 09, 2025

5.0

Very pleasant doctor.

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December 04, 2025

5.0

Dr Keegan is kind and very thorough in explaining everything.

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December 03, 2025

5.0

Thorough, gives me additional advice and things to look out for moving forward

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December 02, 2025

5.0

Very skilled and personable.

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November 29, 2025

5.0

Dr. Keegan is a true professional, she has a great attitude and is very personable. She explains everything completely and makes sure you are as pain free as possible during procedures. Highly recommended.

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November 24, 2025

5.0

As above... she's great!

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November 16, 2025

5.0

Dr. Keegan listens to my concerns, addresses my concerns and answers my questions. She takes the time to explain everything to me. She's very knowledgeable and caring.

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November 14, 2025

5.0

Extremely caring doctor.

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November 12, 2025

5.0

Great job!

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November 12, 2025

5.0

She is both professional and personable

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November 11, 2025

5.0

I have had Dr Keegan for many years as my family's Derm. She is caring, thoughtful, and very smart.

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November 10, 2025

5.0

Communicates well and very competent

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November 09, 2025

5.0

Dr Keegan listens to my concerns and addresses my issues. I don't feel like a number.

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November 09, 2025

5.0

She takes good care of you

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November 08, 2025

5.0

Due to Dr keegan's professionalism I would definitely recommend her to friends.

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November 06, 2025

5.0

She is pleasant, efficient with a keen eye for details.

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November 05, 2025

5.0

Again, Dr. Keegan is fabulous doctor

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November 04, 2025

5.0

Dr. Keegan is thorough in her examinations and always asks questions and voices concerned about my overall health

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October 29, 2025

5.0

Dr. Keegan has given us excellent care and recommendations for years. We trust her as our Dermatology provider.

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October 29, 2025

5.0

I've trusted and sought care from Dr. Keegan since I first met her in 2008. During the few years off due to back issues, I established my dermatological care with Dr. Lauren Taglia. I find them good smart well trained solid practitioners with empathy and compassion.

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October 29, 2025

5.0

She was thorough, going over all the spots. Telling as she was doing the exam what she was finding. Letting me know everything was normal. She made a couple of recommendations for my mild rosesia and also recommended a cream to help my skin from thinning on my arms and hands as I age.

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October 28, 2025

5.0

Not only is she smart and thorough, she is compassionate.

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October 26, 2025

5.0

Extremely knowledgeable and helpful

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October 22, 2025

4.0

See above. Dr. Keegan is great tho.

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October 22, 2025

5.0

I learned a lot. She made me feel comfortable. Safe. Cared for.

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October 22, 2025

5.0

My care and explanation of diagnosis was thoughtful and kind. Great knowledge and recommendations for treatment.

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October 22, 2025

5.0

She's an excellent physician.

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October 17, 2025

5.0

She listens to you and explains everything

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October 16, 2025

5.0

Doctor Keegan and staff are excellent

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October 15, 2025

5.0

Friendly. Extremely thorough. Creates a personal relationship with her patients.

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October 15, 2025

5.0

Dr. Colleen Keegan always made sure I knew what she was doing and why she was doing it. She ALWAYS made sure I knew what steps she planned to take to try to fix the situation. SHE IS AWESOME !!!!!

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October 15, 2025

5.0

She is the BEST!!! Her patient focus is beyond 10!!!

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October 15, 2025

5.0

Dr. Keegan is thorough, knowledegable, and a great listener.

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October 14, 2025

5.0

Dr. Keegan was very thorough and approached everything from a holistic viewpoint.

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October 14, 2025

5.0

she's thorough

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October 07, 2025

5.0

Dr. Keegan is so wonderful! She really cares and is an excellent Dermatologist.

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October 07, 2025

5.0

Took care of problem

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October 07, 2025

5.0

Very helpful and listened to all my issues.

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October 05, 2025

5.0

Listens, explains kind caring understanding! Excellent Dr. Extremely knowledgeable! You couldn't ask for more in a Dr!!!!

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October 02, 2025

5.0

She is very caring and efficient!

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September 30, 2025

5.0

I love Dr. Keegan. She's always responsive. With my multiple "issues" presented at my visit today, she shared a lot of information for me to consider. Seeing a dermatologist can be intimidating because so many people seek perfection through aesthetic treatments. But many of us who have embarrassing and inconvenient skin conditions can be in pain or feel ashamed. Dr. Keegan is warm, empathetic and helpful in her counsel and I truly appreciate her approachability and authenticity.

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September 30, 2025

5.0

She's very thorough!!

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September 29, 2025

5.0

Very good communicator and listener.

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September 24, 2025

5.0

She is top-notch. Very experienced great bedside manner and easy to ask questions to doesn't look at the computer at all and always has a great assistant with her.

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September 21, 2025

5.0

She is very thorough.

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September 19, 2025

5.0

Dr Keegan is professional and has deep experience

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September 15, 2025

5.0

Thorough and knowledgeable

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September 15, 2025

5.0

She listens

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September 13, 2025

5.0

I have and will continue to recommend Dr. Keegan - her professional and compassionate manner is so important and so valuable.

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September 10, 2025

5.0

Dr is very thorough and has excellent knowledge on all dermatology issues. Very kind and respectful.

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September 10, 2025

5.0

I love Dr. Keegan. She is excellent. Staff is friendly and good. Wait time seems to always be long. I was asked to arrive at 9:30 for a 9:45 appt. and I was called back to room at 10:10.

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September 08, 2025

5.0

Dr Keegan is absolutely the most detailed, considerate & concerned doctor I know. She gives you her undivided attention as if you were her only patient.

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August 27, 2025

5.0

one word she isthe best dermatology out in this area of will and dupage county.

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August 26, 2025

5.0

She is great. Takes time to know me

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August 20, 2025

5.0

Competent Explained all procedures. Concerned with my comprehensive care. Attentive to my needs.

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August 20, 2025

5.0

Tod you above .. she is wonderful !

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August 18, 2025

5.0

Great

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August 16, 2025

5.0

She is very thorough. She explains the what's and why's. She has a great bedside manner.

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August 13, 2025

5.0

Dr. Keegan is professional, empathetic and compassionate. Easy to communicate with and is very detailed and knowledgeable.

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August 13, 2025

5.0

She's very personable. She's thorough. She makes you feel at ease instantly.

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August 11, 2025

5.0

very personal,puts you at ease ,knows her stuff.

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August 07, 2025

5.0

Kind and gentle manner, plus she listens to my concerns and answers all my questions. Dr. Keegan makes me feel very comfortable in her office.

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August 06, 2025

5.0

She's awesome! I wish she coukd be our dr for everything. Just wish it was easier to make appts with her. The next opening was months away. She works really hard, makes sure you understand it all, but then has to rush to the next patient bc her appts are short & not much room for questions. Not her fault at all.

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August 06, 2025

5.0

Dr Keegan truly cares about your overall health, so thrilled I was able to become a patient!

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External Professional Relationships

Pharmaceutical, device, and biotechnology companies frequently collaborate with basic scientists and physicians within an academic medical center to help advance science and improve patient care. These relationships are important in achieving scientific breakthroughs and in establishing the effectiveness and safety of promising new therapies. In order to assure objectivity in clinical research and patient care, the Northwestern University Feinberg School of Medicine (Feinberg), Northwestern Memorial HealthCare, Children's Hospital of Chicago Medical Center, and the Shirley Ryan AbilityLab have adopted integrity policies that require research and clinical faculty (in full-time, part-time, and unpaid/voluntary categories) to report compensated and uncompensated external industry relationships. Patients are encouraged to discuss these disclosures with their physician as well as to inquire as to how these relationships are overseen by Feinberg. To learn more about our Disclosure and Professional Integrity Policy, and the conflict of interest policies of our joint affiliate survey partners, please go to our Office for Regulatory Affairs Policies page.

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