Zachary  LaMaster

Zachary LaMaster, D.O.

4600 North Ravenswood Avenue

Chicago, Illinois 60640

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Zachary LaMaster, D.O.

Family Medicine

4600 North Ravenswood Avenue

2nd Floor

Chicago, Illinois 60640


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About Me



  • Residency: Franciscan St. Francis Health Family Medicine Center, Family Medicine
  • Medical School: Midwestern University - Chicago College of Osteopathic Medicine
  • Medical School: Midwestern University - Chicago College of Osteopathic Medicine

Hospital Affiliations

  • Advocate Illinois Masonic Medical Center

Ratings and Comments

Zachary LaMaster, D.O.

5 out of 5

238 Patient Ratings

Gives easy to understand instructions

5 out of 5

220 Patient Ratings

Explains in a way you understand

5 out of 5

237 Patient Ratings

Listens carefully to you

5 out of 5

237 Patient Ratings

Knows your important medical history

4.9 out of 5

238 Patient Ratings

Shows respect for what you say

5 out of 5

237 Patient Ratings

Spends enough time with you

4.9 out of 5

238 Patient Ratings


Kind and empathetic. Very professional but warm. A very good doctor for me. A partner in keeping me well.

Reviewed on November 21, 2019 11:11 AM

Very consistent care from Dr. Lamaster and staff. Excellent nurse in X.

Reviewed on November 21, 2019 11:11 AM

I am very satisfied with Dr. Lamaster and all his team and I have recommended it to my friendships and friends.

Reviewed on November 20, 2019 12:36 PM

I get anxious regarding anything medical & Dr. Lamaster has always been very calm and patient with me.

Reviewed on November 14, 2019 11:00 PM

Dr. Lamaster is a consistent, caring practitioner and the person I go to whenever I have health concerns.

Reviewed on November 13, 2019 11:00 PM

Dr. Lamaster is a great provider. He listened and addressed my concerns.

Reviewed on November 10, 2019 11:00 PM

Dr. Lamaster is the best doctor, that I ever had.

Reviewed on November 3, 2019 6:00 PM

Dr LaMaster is the best doctor I have ever had. He is smart, a good listener and very responsive

Reviewed on October 18, 2019 7:00 PM

Dr. Lamaster is always interested in any changes and concerns to both my physical and mental health.

Reviewed on October 17, 2019 7:00 PM

I always feel like Dr. LaMaster listens to my concerns before making recommendations.

Reviewed on September 27, 2019 7:00 PM

such a positive experience. will definitely recommend

Reviewed on September 15, 2019 7:00 PM

Good experience with this provider

Reviewed on September 15, 2019 7:00 PM

I respect this doctor, and i always appreciate his help.

Reviewed on September 2, 2019 7:00 PM

Dr. LaMaster is simply the best and is a perfect example of an amazing physician.

Reviewed on August 16, 2019 7:00 PM

Dr. Lamaster has been a consistent great doctor for my care and preventative care. Empathetic and a great listener. Very responsive and has helped me.

Reviewed on August 15, 2019 7:00 PM

Reviewed on August 4, 2019 7:00 PM

Provider spent ample time with me and didn't seem rushed. Was good at talking about sensitive issues and bring up important topics. Even went back to update my prescription pharmacy to something near my home when the nurse rushed to enter something near the clinic which is very far from my home.

Reviewed on June 17, 2019 7:00 PM

Excellant. Dr. was on schedule. No long wait in exam room.

Reviewed on June 9, 2019 7:00 PM

Dr. Lamaster was the ideal physician for me to have seen: thoughtful, patient, attentive, caring. I was and am immensely grateful for his care.

Reviewed on May 26, 2019 7:00 PM

Dr. Lamaster is just the best. He listens to me and takes a lot of time going over everything. His MA X is also a superstar I will never change doctor offices!!

Reviewed on May 16, 2019 7:00 PM

Every problem he listens and has patience -

Reviewed on May 16, 2019 7:00 PM

My "primary - care - physician", whose name is Dr. Zachary P. Lamaster is doing a good job, and I appreciate that.

Reviewed on May 16, 2019 7:00 PM

I felt that Dr. Lamaster listened to everything I had to say about my medical concerns and worked with me to develop a treatment plan. He conducted and thorough annual exam and explained everything he was doing and why. It was an excellent appointment at which I received the care I needed with professionalism and friendliness.

Reviewed on May 7, 2019 7:00 PM

Dr. LaMaster has been a great provider for me. He has listened to my needs and addressed them by providing support and referrals.

Reviewed on May 5, 2019 7:00 PM

Dr. Lamaster is always friendly and easy to talk to.

Reviewed on April 29, 2019 7:00 PM

I really like to get treatment from Dr. Llamaster and other doctor such as Dr. X. Both always treat me with respect and they take my concern seriously. The only think i want to say is "big thank you". If i can say better word, i would do it. Again big thanks for my favor doctors.

Reviewed on April 29, 2019 7:00 PM

Always a pleasure. Thanks.

Reviewed on April 15, 2019 7:00 PM

Dr. LaMaster is THE BEST primary care physician I have ever had. He and his staff are efficient, responsive and yet AWLAYS take the time to listen to me and help me through my concerns/needs. My RX"s are always refilled on time and referrals made easily. Dr. is always so warm and compassionate, happy to see me and help me. I look forward to seeing Dr. LaMaster in the office!

Reviewed on April 14, 2019 7:00 PM

We love Doctor Lamaster!!!

Reviewed on April 1, 2019 7:00 PM

Best doctor experience I have had. Uplifting & informative. I feel I know my body now.

Reviewed on March 23, 2019 7:00 PM

I'm always impressed by Dr. LaMaster's care and compassion. He is a classic primary care doctor who generally seems to care about me and my health.

Reviewed on March 17, 2019 7:00 PM


Reviewed on March 17, 2019 7:00 PM

Dr. Lamaster is one of the first doctors to not make me feel like crap. He was kind, patient, and very informative.

Reviewed on March 10, 2019 7:00 PM

Dr. Lamaster is an amazing & affirming dr. He wanted to know about where I grew up & my family history before we talk about Rx's & general health awesome approach!

Reviewed on February 24, 2019 6:00 PM

I have recommended Dr. Lamaster to other people since I am very satisfied with him & I have recommended Advocate Medical Group.

Reviewed on February 7, 2019 6:00 PM

Dr. Lamaster was very helpful regarding my questions about a potentially sensitive health issue. I felt reassured and he provided options for further consultation and treatment.

Reviewed on February 7, 2019 6:00 PM

It was my Truvada 3 month check-in. We also talked about my sinus infection. Very standard visit. Friendly and professional as always.

Reviewed on February 1, 2019 6:00 PM

Thank you for the great care!

Reviewed on January 29, 2019 6:00 PM

Dr. LaMaster is an excellent doctor and I always recommend him to my family and friends

Reviewed on January 27, 2019 6:00 PM

Excellent experience as always with Dr. LaMaster, I always feel heard and respected after I speak with him. I always know exactly what to expect and how to get in contact with him if anything is unusual or concerns me.

Reviewed on January 24, 2019 6:00 PM

as always, felt like i'm in very good hands

Reviewed on January 24, 2019 6:00 PM

The provider often seems rushed, and while the presenting issues I want to discuss are addressed, I would want more time two explain them and have him understand them in the time allotted for my visit. I know part of this is the constraints of the healthcare system and getting everything in in 15 minutes or so. It would be nice to have longer visits for the routine checkups of my provider not only the longer visits for a manipulation.

Reviewed on January 24, 2019 6:00 PM

Dr LaMaster is fantastic. excellent doctor. so glad to have found him.

Reviewed on January 24, 2019 6:00 PM

Absolutely great experience with Dr. LaMaster - very willing to listen, spend as much time as needed to answer questions. Ten of ten.

Reviewed on January 3, 2019 6:00 PM

he was very short and curt and with my questions he seemed as tho he didnt want to amswer them

Reviewed on November 25, 2018 6:00 PM

I was very happy about the time Dr. spent with me. I liked his demeanor and the questions he asked. I was happy I made the appointment.

Reviewed on November 23, 2018 6:00 PM

Dr. Lamaster is a very friendly and respectful physician - always able to answer any questions or concerns well and thoroughly.

Reviewed on November 18, 2018 6:00 PM

Professional, out me an ease, answered all my questions, helped me through a confusing period. I'm going to be updating my insurance so that I can try and keep my doctors and services.

Reviewed on November 16, 2018 6:00 PM

Quick in and out. Good rapport.

Reviewed on November 12, 2018 6:00 PM

Dr LaMaster was highly attentive and provided kind care to us.

Reviewed on October 20, 2018 7:00 PM

I love Dr. Lamaster! He always makes me feel calm and less anxious about going to the doctor. He takes the time to listen to my concerns.

Reviewed on October 17, 2018 7:00 PM

Dr. Lamaster has consistently taken good care of me and provided valuable care and advice for my myriad of physical and mental health issues.

Reviewed on October 16, 2018 7:00 PM

I'm very pleased Zachary Lamaster is my doctor.

Reviewed on October 7, 2018 7:00 PM

I trust Dr. LaMaster's opinion and care very much. That's why I continue to see him.

Reviewed on October 6, 2018 7:00 PM

Dr. Lamaster is always interested in my health issues, follows up on past visits and tests, and encourages age-related check-ups.

Reviewed on September 21, 2018 7:00 PM

Dr. LaMaster provided excellent service as always. There was a medical student there who came in and asked some questions. I normally wouldn't have minded the extra time, but I was there with my newborn and toddler. In the future, it may be helpful to determine which patients to have the student talk with the patients parents separately vs with the doctor too to minimize time.

Reviewed on September 16, 2018 7:00 PM

Good experience

Reviewed on September 10, 2018 7:00 PM

Doctor Lamaster is hands-down one of the best doctors I've ever encountered.

Reviewed on September 3, 2018 7:00 PM

he is very nice and knowledgeable.

Reviewed on September 1, 2018 7:00 PM

He was attentive to my health issues, and he did a good job with respect to my 1st visit, and I appreciated it.

Reviewed on August 23, 2018 7:00 PM

Dr. LaMaster is helpful and caring. He sees our other daughter and helped us get two last minute appts with him. He always takes the time to address our questions and ensure we are clear on what to do.

Reviewed on August 19, 2018 7:00 PM

I have nothing but positive things to say about Dr Lamaster and the rest of the team at family practice

Reviewed on August 19, 2018 7:00 PM

Dr. LaMaster is kind and considerate and very consistent. I'm very happy being his patient. Also the technician in the lab is excellent and puts me at my ease despite my being nervous of blood draws.

Reviewed on August 19, 2018 7:00 PM

Dr Zach was very helpful answering all my questions.

Reviewed on August 7, 2018 7:00 PM

Dr. LaMaster has been one of the best providers I have had over my 55-year lifespan. He is collaborative with my health and wellbeing overall.

Reviewed on August 6, 2018 7:00 PM

Dr. LaMaster is the best! Always makes me feel so comfortable!

Reviewed on July 19, 2018 7:00 PM

I am very satisfied of having Dr. Zachary Lamaster as a doctor.

Reviewed on July 17, 2018 7:00 PM

He is the best doctor that I ever had...

Reviewed on July 16, 2018 7:00 PM

Dr. LaMaster was very professional, approachable, and easy to talk to about my medical concerns. I felt very comfortable during my visit and felt all of my questions were asked and addressed accordingly.

Reviewed on July 15, 2018 7:00 PM

Dr. Lamaster is the best physician I've had. So kind, caring, compassionate; I feel like I can be myself and discuss personal matter with him.

Reviewed on July 10, 2018 7:00 PM

I am very happy with my Doctor and the services at the Chicago Ravenswood center

Reviewed on June 29, 2018 7:00 PM

Excellent physician. Dr. LaMaster is always very professional, courteous and takes his time to answer any questions I may have.

Reviewed on June 25, 2018 7:00 PM

my only complaint is that there is always a long wait time between seeing the doctor and my daughter getting her shots which just heightens her anxiety and makes the experience worse.

Reviewed on June 15, 2018 7:00 PM

He is nice & friendly. It would be nice if the exam rooms had better ambiance - especially if the rooms for kid's exams were kid-friendly and KID-SAFE!

Reviewed on June 13, 2018 7:00 PM

Very good person to me and I like him.

Reviewed on June 1, 2018 7:00 PM

Excellent as usual - Great care and communication. All I would hope for in a provider.

Reviewed on May 30, 2018 7:00 PM

I hate doctor appointments and never go unless I absolutely have to. Dr. Lamaster is everything a person would expect a physician to be. I will no longer fear/get anxious about going to the doctor (as long as I'm going to see him). Though this was my first visit with him, I felt I'd known him for years. He was easy to speak with, showed genuine care/concern for my issue, made me feel comfortable and even has a good sense of humor. I wish I'd found Dr. Lamaster years ago. Great physician!

Reviewed on May 27, 2018 7:00 PM

Overall my provider is very thorough. He answers all the questions I have and I enjoy my visits with him. The only thing I would recommend is sometimes it feels like he only has a brief amount of time and needs to efficiently get through questions and issues that I bring up. I understand that there are multiple appointments and he wants to be timely, but sometimes it would be helpful to not feel rushed.

Reviewed on May 18, 2018 7:00 PM

Dr. Lamaster is my favorite doctor on the planet.

Reviewed on May 8, 2018 7:00 PM

Dr. Lamaster is a consummate professional with an exceptional manner to make his patients feel comfortable and listened to. I've personally recommended him to close friends because of how much I appreciate his care.

Reviewed on May 6, 2018 7:00 PM

great experience. I had been searching for a new PCP for a while and I've definitely found him. thank you!

Reviewed on April 22, 2018 7:00 PM

Awesome. I can assure you that between my PCP Dr. X and Dr. Zachary Lamaster this team will win this health battle for me. I hope to be with them both for years to come as a comprehensive team to ensure the general/personal well-being of my health.

Reviewed on April 15, 2018 7:00 PM

I felt the most comfortable with Dr. Lamaster than I have ever felt with a health care provider. It was like speaking to a friend.

Reviewed on April 15, 2018 7:00 PM


Reviewed on April 15, 2018 7:00 PM


Reviewed on April 8, 2018 7:00 PM

I am very satisfy with Dr. Lamaster, I would recommend him to fam. & friends.

Reviewed on February 14, 2018 6:00 PM

Dr. LaMaster has excellent people skills. Amazing attention to detail and follow-up. I feel very grateful for finding him as my primary care physician.

Reviewed on February 11, 2018 6:00 PM

Dr. Lamaster is the best. He cares about my and my family's health and always listens, follows up on things as necessary, and is thorough. Couldn't ask for a better primary.

Reviewed on February 4, 2018 6:00 PM

Dr. Lamaster is great to interact with. He understands my health concerns and addresses them clearly, making sure I understand everything we are discussing. When I am overly concerned about something he takes the time to put my mind at ease and makes sure that I am aware that I am empowered to take my health care in whatever direction best suits me. Absolutely the best PCP I've had to date with any health care system.

Reviewed on February 4, 2018 6:00 PM

I could not be more pleased with Dr. Lamaster. I always feel confident about the care he provides and the recommendations made for my daughter. However, when I see other providers, it can be very confusing because of the various plans of care employed by each provider. I want to continue my daughters care with Dr. Lamaster; however, I do not wish to see many of the other practitioners secondary to the conflicting care and treatment recommendations offered.

Reviewed on January 29, 2018 6:00 PM

Good listener and attentive

Reviewed on January 5, 2018 6:00 PM

Dr. Lamaster is always on top of what's going on with me. I like that in a doctor. Thanks.

Reviewed on December 13, 2017 6:00 PM

Dr. Lamaster was great. Saw me very quickly and spent more time than expected discussing my health. Makes you feel very comfortable.

Reviewed on December 11, 2017 6:00 PM

Dr. LaMaster is the best doctor I've had ever. He listens, takes time & care, is not condescending, & truly wants to help the patient.

Reviewed on December 5, 2017 6:00 PM

I can't speak highly enough about Dr. Lamaster. I had very negative, upsetting, and poor experiences with my previous doctor from a different medical group, and Dr. Lamaster could not have been more patient and through. He made sure all my questions were asked and discussed. He has a great level of professionalism, and even with this being my first visit to him he was genuine and showed concern for my well being. I will absolutely be recommending him to family and friends. I'm so glad I am a patient of his.

Reviewed on November 27, 2017 6:00 PM

This was my first visit with Dr. LaMaster. I was referred to him after my Harken Care was cancelled at the end of July. I hope to continue on with him if I can find the right insurance in 2018 or even pay cash. He was very kind and impressive. I felt well cared for despite the circumstances.

Reviewed on November 5, 2017 6:00 PM

Trying to schedule with the desk is difficult I prefer speaking with the doc's nurse.

Reviewed on October 16, 2017 7:00 PM

Dr. Lamaster was very caring and listened to all of my concerns. I felt I was getting excellent care.

Reviewed on October 11, 2017 7:00 PM

My provider showed caring and respect. He answered all our questions. He spent the necessary time to take care of us and was through with his examination.

Reviewed on October 10, 2017 7:00 PM

Very thorough as always

Reviewed on October 9, 2017 7:00 PM

health eNews with Zachary LaMaster, D.O.

Medical Areas of Expertise

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Clinical Interests

  • LGBTQ Health
  • TGNC - Hormone/Surgery/Procedures
  • TGNC - Primary Care/OBGYN
  • TGNC - Youth


  • AAH Preferred – Team Member Plan
  • AAH Select – Team Member Plan
  • AARP MedicareComplete Plus HMO - POS
  • Aetna Better Health Premier Plan MMAI
  • Aetna Choice POS
  • Aetna Choice POS II
  • Aetna HMO
  • Aetna Managed Choice (MC) POS
  • Aetna NAP - PPO
  • Aetna Open Access POS
  • Aetna Open Choice POS
  • Aetna Open Choice PPO
  • Aetna Select Choice EPO
  • Aetna Select POS
  • Aetna Signature Administrators PPO
  • Aetna US Healthcare Medicare Advantage HMO
  • Beech Street Network PPO
  • Blue Advantage HMO
  • Blue Cross HMO Illinois
  • Blue Cross Medicare Advantage HMO
  • Blue Cross Medicare Advantage HMO - POS
  • Blue Cross Medicare Advantage PPO
  • Blue Cross PPO
  • Blue Cross PPO - Advocate Associate Medical Plan
  • Blue Precision Bronze HMO
  • Blue Precision Gold HMO
  • Blue Precision HMO
  • Blue Precision Platinum HMO
  • Blue Precision Silver HMO
  • BlueCare Direct
  • Cigna C - 5 POS
  • Cigna Health Partners POS
  • Cigna Health Partners PPO
  • Cigna Open Access Plus POS
  • Cigna Open Access Plus State of Illinois POS
  • CIGNA Open Access POS
  • Cigna POS
  • Cigna PPO
  • Cofinity PPO
  • Coventry HMO
  • Coventry One Select PPO
  • Coventry PPO
  • Coventry Workers Comp PPO
  • First Health Network EPO
  • First Health Network PPO
  • Great West Healthcare - Cigna HMO
  • Great West Healthcare - Cigna Open Access Plus HMO
  • Great West Healthcare - Cigna PPO
  • Harken Health Choice Plus
  • Harken Health Compass Plus
  • Health Alliance HMO
  • Health Alliance PPO
  • Healthlink PPO
  • HealthSpring Medicaid ICP
  • HealthSpring Medicare HMO
  • HealthSpring MMAI
  • HFN Platinum EPO
  • HFN Total Care PPO
  • Humana Choice POS
  • Humana Gold Choice PFFS
  • Humana Gold Choice PPO
  • Humana Gold Plus HMO
  • Humana Gold Plus Integrated-Medicare-Medicaid Plan
  • Humana HMO Select
  • Humana Illinois Platinum HMO
  • Humana Integrated Care Program of Illinois
  • Humana Medicaid Managed Care Plan
  • Humana National EPO
  • Humana National HMO
  • Humana National POS - Open Access
  • Humana National PPO
  • Humana POS
  • Humana PPO
  • LLH Adventist Silver PPO 3000
  • LLH Family Health Network Silver PPO 3100
  • LLH Swedish Covenant Silver PPO
  • Meridian
  • Meritain Health PPO
  • MultiPlan PPO
  • NALC (Natl Assn of Letter Carriers) Health Benefit
  • PHCS Savility PPO
  • Preferred Network Access PPO
  • Three Rivers Provider Network PPO
  • Tricare POS
  • Tricare PPO
  • UFCW Local 1546 Health and Welfare Fund (UMC)
  • UHC / AARP MedicareComplete (Secure Horizons) HMO
  • UHC / AARP MedicareComplete Focus HMO
  • Union Medical Care PPO
  • United Healthcare Charter
  • United Healthcare Choice HMO
  • United Healthcare Choice Plus POS
  • United Healthcare Compass HMO
  • United Healthcare Group Medicare Advantage PPO
  • United Healthcare Medicare Solutions PPO
  • United Healthcare MedicareComplete Plan 1 HMO
  • United Healthcare Navigate HMO
  • United Healthcare Navigate POS
  • United Healthcare Nexus
  • United Healthcare Options PPO
  • United Healthcare Select EPO
  • United Healthcare Select HMO
  • United Healthcare Select Plus POS


Learn more about this provider and request an appointment online. Prior to requesting an appointment with any provider you select, confirm with your insurance carrier that this doctor is in your insurance network.

Information listed under the "clinical interests" columns was supplied by the physicians. It is provided to you for informational purposes only, and neither Advocate Health Care nor the Advocate facility has independently verified the information. If you wish to confirm the information contained herein, or if you have any other questions about a particular physician, please contact the physician’s office.

Unless otherwise stated, physicians are independent practitioners who are not employees or agents of Advocate Health Care or the Advocate facility where the care is being provided. Neither Advocate Health Care nor the Advocate facility shall be liable for the medical care provided or decisions made by these independent physicians.

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