Zachary LaMaster, DO

Specialty: Family Medicine

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Advocate Medical Group

4600 North Ravenswood Avenue

2nd Floor

Chicago, IL 60640

Get directions

Office: 773-561-7500

Fax: 773-561-7612

Meet Zachary LaMaster, DO

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

Board certifications

  • Family Medicine

Hospital affiliations

  • Advocate Illinois Masonic Medical Center

Insurance accepted

  • AAH Preferred – Team Member Plan
  • AAH Select – Team Member Plan
  • AARP Medicare Advantage Access HMO
  • Aetna Better Health Premier Plan MMAI
  • Aetna Coventry (Aetna Medicare) HMO
  • Aetna EPO
  • Aetna HMO
  • Aetna Managed Choice (MC) POS
  • Aetna Medicare HMO
  • Aetna Medicare POS
  • Aetna Medicare PPO
  • Aetna Medicare Value Plan PPO
  • Aetna NAP - PPO
  • Aetna Open Choice PPO
  • Aetna POS
  • Aetna Premier Care Network
  • Aetna Select
  • Aetna Signature Administrators PPO
  • Aetna State of Illinois HMO
  • Aetna State of Illinois Open Access Plus
  • Aetna State of Illinois PPO
  • Aetna Value Performance Network
  • Beech Street Network PPO
  • Benefit Plan Administrators (BPA)
  • Benefits Services and Systems, Inc
  • Blue Advantage HMO
  • Blue Cross Community FHP
  • Blue Cross Community ICP
  • Blue Cross Community MMAI
  • Blue Cross HMO Illinois
  • Blue Cross Med Select PPO
  • Blue Cross Medicare Advantage HMO
  • Blue Cross Medicare Advantage HMO-POS
  • Blue Cross Medicare Advantage PFFS
  • Blue Cross Medicare Advantage PPO
  • Blue Cross Medicare Supplement PPO
  • Blue Medicare Advocate Health HMO
  • Blue Precision HMO
  • BlueCare Direct
  • Cigna APWU Health Plan Open Access Plus
  • Cigna EPO
  • Cigna Health Partners POS
  • Cigna Healthspring True Choice PPO
  • Cigna HMO
  • Cigna NALC Health Benefits Plan
  • Cigna Open Access Plus
  • Cigna Open Access POS
  • Cigna POS
  • Cigna PPO
  • Cigna-HealthSpring Medicare Advantage HMO
  • Cofinity PPO
  • Coventry / FirstHealth
  • Coventry Health Care HMO
  • Coventry Health Care Open Access POS
  • Coventry Health Care POS
  • Coventry Health Care PPO
  • First Health Network PPO
  • FirstHealth / Coventry Personal Care
  • Galaxy Health Network PPO
  • Great West Healthcare - Cigna EPO
  • Great West Healthcare - Cigna PPO
  • HealthLink PPO
  • HealthSmart Preferred PPO
  • HST Care Connect EPO
  • HST Care Connect PPO
  • Humana Choice POS
  • Humana Community Select HMO
  • Humana HMO
  • Humana Illinois CCN HMO
  • Humana Medicare Advantage HMO
  • Humana Medicare Choice PPO
  • Humana Medicare Gold Plus HMO
  • Humana Medicare Supplement Plan
  • Humana MMAI
  • Humana National HMO
  • Humana National POS
  • Humana National POS - Open Access
  • Humana POS
  • Humana PPO
  • Medicare
  • Meridian
  • Meridian MMAI
  • MultiPlan PPO
  • SEIU – Local 4 HMO
  • SEIU – Local 4 PPO
  • Tricare Prime
  • UFCW Local 1546 Health and Welfare Fund (UMC)
  • UHC / AARP Medicare Advantage Value HMO - POS
  • UHC / AARP Medicare Complete HMO
  • UHC / AARP Medicare Complete Plan 1 HMO
  • UHC / AARP Medicare Complete Plan 2 HMO
  • UHC / AARP Medicare Supplement
  • UHC National Railway Carriers & United Transportation Union Health and Welfare
  • UHC Railroad Employees National Health & Welfare Plan
  • UHC/ AARP Medicare Advantage Choice PPO
  • UniCare PPO
  • Union Health Services, Inc.
  • Union Medical Care PPO
  • United Health One Golden Rule
  • United Healthcare Charter HMO
  • United Healthcare Choice Plus PPO
  • United Healthcare Choice PPO
  • United Healthcare Core PPO
  • United Healthcare Group Medicare Advantage PPO
  • United Healthcare Indemnity
  • United Healthcare Medica
  • United Healthcare Medicare Complete Assure PPO
  • United Healthcare Navigate HMO
  • United Healthcare NexusACO OA
  • United Healthcare NexusACO R
  • United Healthcare Options PPO
  • United Healthcare Oxford
  • Wellcare Health Plans HMO

Ratings and reviews

Overall rating

based on 249 patient ratings.


July 27, 2020 8:24 PM

I trust Dr LaMaster. he is always thorough and helpful.

July 27, 2020 9:27 AM

Dr. Lamaster is always attentive and has a comforting, good attitude and this last visit wasn't any different.

July 27, 2020 9:27 AM

As a gay man of color, Dr. Lamaster makes me feel safe and well-informed about my health and my health care decisions.

July 20, 2020 1:59 PM

It was good. I was with both kids in the same office, so it was hard to talk, but that was because I did not have help from my family that day. Otherwise, the doctor was great!

July 8, 2020 11:36 AM

Excellent service by all personnel at Advocate, 4600 N. Ravenswood, Chicago IL 60640.

June 29, 2020 2:36 PM

Prompt on time appointment. Very important to me. Good knowledge of my health and personal history.

June 29, 2020 2:36 PM

Experience could not have been better.

May 24, 2020 11:09 AM

Due to the shelter in place rules, this was a video visit. And since it was a routine check-up/follow-up, it was overall a good experience.

May 4, 2020 1:24 PM

Some of these questions asking about my most recent visit was structured for in-person visits, however, I did my visit via teleconference. Everyone was courteous and it worked well for a check-up.

May 4, 2020 1:24 PM

Dr LaMaster is a great PCP. He's professional, very knowledgeable and is a great communicator. I've felt safe to discuss medical concerns and happy to share progress.

April 20, 2020 3:44 PM

Dr. Lamaster is always friendly, knowledgeable, empathetic and helpful. I am comfortable with him and trust his advice and counsel.

April 20, 2020 3:44 PM

This was a phone visit because of the coronavirus pandemic. I had a positive talk with Dr. Lamaster about my overall health conditions and we both felt comfortable that things are going well.

March 27, 2020 12:13 PM

always listens and asks the appropriate questions

March 27, 2020 12:13 PM


March 21, 2020 11:34 PM

Dr LaMaster is always a delight to see, he is always attentive to my health and I have been happy since he has become my PCP.

March 9, 2020 3:55 PM

Dr. LaMaster is the greatest PCP I've ever had, and I truly can't overstate what an excellent partner he has been since I started seeing him over 4 years ago.

March 4, 2020 10:11 AM

Dr. LaMaster was great! This was my first time feeling truly comfortable with a doctor and was able to talk openly about issues I've never felt free to discuss.

March 2, 2020 3:40 PM

The only thing I would say is bad is that it took 6 weeks to get in for an appointment and I had a hard time scheduling a follow up within the time frame he asked me to (4 weeks, and I am at 6 weeks).

March 2, 2020 3:40 PM

Dr. Lamaster always provides excellent care. He's open, talks freely and shares information in a concise manner, and is realistic about outcomes and risks. I have referred several people to him since starting to see him. He is night and day in his level of friendliness and communication vs. my previous physician.

February 10, 2020 4:50 PM

All good.

February 10, 2020 4:50 PM

Kind, great communicator, good clinician, attentive, warm, and excellent care.

January 21, 2020 9:01 AM

front desk staff is very very helpful and professional. X the MA is amazing - she is so helpful. Dr. Lamaster is a great listener and addresses all my questions and spends enough time with me. they are a great care team!

January 21, 2020 9:01 AM

a great experience!

December 16, 2019 8:55 PM

I absolutely love Dr. Lamaster. He is intelligent and empathic. I feel like we are in a partnership working towards the best me.

December 5, 2019 10:38 AM

Not an ideal office for unexpected sickness. The walk-in clinic has very limited hours.

December 5, 2019 10:38 AM

Positive the nurse & doctor were both friendly. Overall a comfortable first experience.

November 21, 2019 11:11 AM

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

November 21, 2019 11:11 AM

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

November 20, 2019 12:36 PM

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

November 14, 2019 11:00 PM

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

November 13, 2019 11:00 PM

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

November 10, 2019 11:00 PM

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

November 3, 2019 6:00 PM

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

October 18, 2019 7:00 PM

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

October 17, 2019 7:00 PM

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

September 27, 2019 7:00 PM

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

September 15, 2019 7:00 PM

such a positive experience. will definitely recommend

September 15, 2019 7:00 PM

Good experience with this provider

September 2, 2019 7:00 PM

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

August 16, 2019 7:00 PM

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

August 15, 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.

August 4, 2019 7:00 PM

June 17, 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.

June 9, 2019 7:00 PM

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

May 26, 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.

May 16, 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!!

May 16, 2019 7:00 PM

Every problem he listens and has patience -

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.

May 7, 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.

May 5, 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.

April 29, 2019 7:00 PM

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

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.

April 15, 2019 7:00 PM

Always a pleasure. Thanks.

April 14, 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!

April 1, 2019 7:00 PM

We love Doctor Lamaster!!!

March 23, 2019 7:00 PM

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

March 17, 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.

March 17, 2019 7:00 PM


March 10, 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.

February 24, 2019 6:00 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!

February 7, 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.

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.

February 1, 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.

January 29, 2019 6:00 PM

Thank you for the great care!

January 27, 2019 6:00 PM

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

January 24, 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.

January 24, 2019 6:00 PM

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

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.

January 24, 2019 6:00 PM

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

January 3, 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.

November 25, 2018 6:00 PM

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

November 23, 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.

November 18, 2018 6:00 PM

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

November 16, 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.

November 12, 2018 6:00 PM

Quick in and out. Good rapport.

October 20, 2018 7:00 PM

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

October 17, 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.

October 16, 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.

October 7, 2018 7:00 PM

I'm very pleased Zachary Lamaster is my doctor.

October 6, 2018 7:00 PM

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

September 21, 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.

September 16, 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.

September 10, 2018 7:00 PM

Good experience

September 3, 2018 7:00 PM

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

September 1, 2018 7:00 PM

he is very nice and knowledgeable.

August 23, 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.

August 19, 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.

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

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.

August 7, 2018 7:00 PM

Dr Zach was very helpful answering all my questions.

August 6, 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.

July 19, 2018 7:00 PM

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

July 17, 2018 7:00 PM

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

July 16, 2018 7:00 PM

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

July 15, 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.

July 10, 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.

June 29, 2018 7:00 PM

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

June 25, 2018 7:00 PM

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

June 15, 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.

June 13, 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!

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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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