Northwest Community Hospital

Megan Brennan

Brennan-Megan-1407433055-profile
Megan Brennan
Megan Brennan
MD
Specialties
Sports Medicine (Non-surgical)
National Provider Identifier
1407433055
Employment Status/Appointment
Medical Staff
Female
    1407433055 - 13669 - Endeavor Health Medical Group 1407433055 - 31606 - Endeavor Health Medical Group 1407433055 - 9883 - Endeavor Health Medical Group
Provider Status
Active
Accepting Patients
No
Employed
Yes

My endeavor is to get my patients back to living their healthy, active lifestyle with as little pain as possible.

Open Scheduling
Off
My Chart Scheduling
Off

I partner with patients and treat them like a family member of mine. I focus on understanding their goals and working together to find the best path forward. That may include physical therapy, medications, injections or a combination of these options. It is important to me that patients feel comfortable with the plan we create together and leave the visit knowing they played an active role in shaping their care.

Megan Brennan, MD, a primary care sports medicine physician at Endeavor Health, cares for patients of all ages with a wide range of musculoskeletal conditions. Her clinical focus includes sports injuries, concussions, arthritis-related pain and everyday joint or muscle concerns that affect daily activity. Dr. Brennan evaluates injuries, develops individualized treatment plans and helps patients return to movement and activity through a combination of conservative therapies tailored to each person’s goals.

Years Experience
5
Medical Group Override
Off
Hide Online Scheduling
Off
Override Specialties
On
Display Middle Name
Off
Override Locations
Off
Primary Specialty Not Schedulable
Off

Merle Diamond

Merle Diamond, MD
Merle Diamond
Merle Diamond
MD
Specialties
Headache Medicine
National Provider Identifier
1780676668
Employment Status/Appointment
Medical Staff
Female
    1780676668 - 6095 - Endeavor Health Medical Group 1780676668 - 8286 - Endeavor Health Medical Group
Provider Status
Active
Accepting Patients
No
Employed
Yes

My endeavor is to help patients regain control over their lives by providing compassionate, individualized care for those living with headache and migraine disorders.

Open Scheduling
Off
My Chart Scheduling
Off

I focus on helping patients restore normal function so they can live fully. While headaches may not disappear completely, I teach my patients how to manage attacks effectively, giving them the confidence and tools to maintain their quality of life. 

Merle Diamond, MD, a headache medicine specialist at Endeavor Health, provides comprehensive care for patients living with migraine and other headache disorders. She earned her medical degree from Northwestern University Feinberg School of Medicine and completed her residency in internal and emergency medicine at Northwestern Memorial Hospital. Board certified in internal medicine and specially trained in headache medicine, Dr. Diamond has contributed to more than 70 scientific publications and co-authored several headache textbooks, advancing clinical understanding and patient care.

Years Experience
46
Medical Group Override
Off
Hide Online Scheduling
Off
Override Specialties
On
Primary Specialty Not Schedulable
Off

George Nissan

George Nissan, DO
George Nissan
George Nissan
DO
Specialties
Headache Medicine
National Provider Identifier
1245222033
Employment Status/Appointment
Medical Staff
Male
    1245222033 - 6095 - Endeavor Health Medical Group 1245222033 - 8286 - Endeavor Health Medical Group
Provider Status
Active
Accepting Patients
No
Employed
Yes

My endeavor is to improve the quality of life of patients with headache disorders and remain committed to each and every patient I treat.

Open Scheduling
Off
My Chart Scheduling
Off

I listen carefully to each patient’s detailed headache history and create a multidisciplinary plan tailored to their needs. This includes lifestyle modifications, preventive therapies and acute headache management to help improve quality of life for those with headache disorders.

George Nissan, DO, a headache medicine specialist at Endeavor Health, provides comprehensive care for patients living with chronic and complex headache disorders. He earned his medical degree from the Chicago College of Osteopathic Medicine and completed his internal medicine residency and chief residency at Methodist Medical Center in Dallas, Texas. Board certified in internal medicine and specially trained in headache medicine, Dr. Nissan has focused on inpatient and outpatient headache care since 2003 and serves as Co-Director of the Endeavor Health Diamond Headache & Migraine Center.

Years Experience
27
Medical Group Override
Off
Hide Online Scheduling
Off
Override Specialties
On
Display Middle Name
Off
Override Locations
Off
Primary Specialty Not Schedulable
Off

Kristin Nelson

Kristin Nelson, APN-DNP
Kristin Nelson
Kristin Nelson
APN-CNP
Specialties
Headache Medicine
National Provider Identifier
1043778731
Employment Status/Appointment
Employed
Female
    1043778731 - 6095 - Endeavor Health Medical Group 1043778731 - 8286 - Endeavor Health Medical Group
Provider Status
Advanced Practitioner
Accepting Patients
No
Employed
Yes
Open Scheduling
Off
My Chart Scheduling
Off
Years Experience
8
Medical Group Override
Off
Hide Online Scheduling
Off
Override Specialties
On
Primary Specialty Not Schedulable
Off

Caroline Wright

Caroline Wright, PA-C
Caroline Wright
Caroline Wright
PA-C
Specialties
Headache Medicine
National Provider Identifier
1295553626
Employment Status/Appointment
Employed
Female
    1295553626 - 30707 - Endeavor Health Medical Group 1295553626 - 6095 - Endeavor Health Medical Group 1295553626 - 8286 - Endeavor Health Medical Group
Provider Status
Advanced Practitioner
Accepting Patients
No
Employed
Yes
Open Scheduling
Off
My Chart Scheduling
Off
Years Experience
2
Medical Group Override
Off
Hide Online Scheduling
Off
Override Specialties
On
Primary Specialty Not Schedulable
Off

Ayisha Jameel

Ayisha Jameel, MD
Ayisha Jameel
Ayisha Jameel
MD
Specialties
Psychiatry
National Provider Identifier
1508194887
Employment Status/Appointment
Provisional
Female
    1508194887 - 2191 - Endeavor Health Medical Group
Provider Status
Active
Accepting Patients
No
Employed
Yes
Open Scheduling
Off
My Chart Scheduling
Off
Years Experience
22
Medical Group Override
Off
Hide Online Scheduling
Off
Override Specialties
Off
Primary Specialty Not Schedulable
Off

Susie Ro

Susie Ro, MD
Susie Ro
Susie Ro
MD
Specialties
Neurology
National Provider Identifier
1902965643
Employment Status/Appointment
Assistant
Female
    1902965643 - 13765 - Endeavor Health Medical Group 1902965643 - 31476 - Endeavor Health Medical Group 1902965643 - 5502 - Endeavor Health Medical Group
Provider Status
Active
Accepting Patients
No
Employed
Yes
Open Scheduling
Off
My Chart Scheduling
Off
Years Experience
27
Medical Group Override
Off
Hide Online Scheduling
Off
Override Specialties
Off
Primary Specialty Not Schedulable
Off

Marny Fetzer

Marny Fetzer, MD
Marny Fetzer
Marny Fetzer
MD
Specialties
Hospice & Palliative Medicine
National Provider Identifier
1982643730
Employment Status/Appointment
Medical Staff
Female
    1982643730 - 16618 - Endeavor Health Medical Group 1982643730 - 16619 - Endeavor Health Medical Group 1982643730 - 16620 - Endeavor Health Medical Group 1982643730 - 1956 - Endeavor Health Medical Group 1982643730 - 30392 - Endeavor Health Medical Group 1982643730 - 3923 - Endeavor Health Medical Group 1982643730 - 4728 - Endeavor Health Medical Group 1982643730 - 9885 - Endeavor Health Medical Group
Provider Status
Active
Accepting Patients
No
Employed
Yes
Open Scheduling
Off
My Chart Scheduling
Off
Years Experience
24
Medical Group Override
Off
Hide Online Scheduling
Off
Override Specialties
Off
Primary Specialty Not Schedulable
Off

Mary Joyce-Cahill

Mary Joyce-Cahill
Mary Joyce-Cahill
APN-CNP
Specialties
Hospice & Palliative Medicine
National Provider Identifier
1790178671
Employment Status/Appointment
Employed
Female
    1790178671 - 16618 - Endeavor Health Medical Group 1790178671 - 16619 - Endeavor Health Medical Group 1790178671 - 16620 - Endeavor Health Medical Group 1790178671 - 30392 - Endeavor Health Medical Group 1790178671 - 3923 - Endeavor Health Medical Group
Provider Status
Advanced Practitioner
Accepting Patients
No
Employed
Yes
Open Scheduling
Off
My Chart Scheduling
Off
Years Experience
12
Primary Specialty Not Schedulable
Off

Elizabeth Mann

Elizabeth Mann, PA-C
Elizabeth Mann
Elizabeth Mann
PA-C
Specialties
Internal Medicine
National Provider Identifier
1396846788
Employment Status/Appointment
Employed
Female
    1396846788 - 31196 - Endeavor Health Medical Group
Provider Status
Advanced Practitioner
Accepting Patients
No
Employed
Yes
Overall Rating
5
Total Ratings
42
Total Comments
7
Comments
[{"id":1809668215,"surveyKey":"10697961856","source":"PG Survey- MD","mentionTime":"2026-02-08T05:00:00Z","wordCount":33,"comment":"Elizabeth Mann is very knowledgeable and compassionate and listens to everything that I have to say. I really enjoy working with her. I feel she is partnering with me to make me successful.","ratings":[],"overallRating":{"name":"Likelihood to recommend","value":5}},{"id":1809668225,"surveyKey":"10697961768","source":"PG Survey- MD","mentionTime":"2026-02-08T05:00:00Z","wordCount":22,"comment":"Elizabeth is very knowledgeable about weight loss strategies. She answered all of my questions thoroughly. She is very easy to talk to.","ratings":[],"overallRating":{"name":"Likelihood to recommend","value":5}},{"id":1809669951,"surveyKey":"10650081471","source":"PG Survey- MD","mentionTime":"2026-02-04T05:00:00Z","wordCount":14,"comment":"The provider has been very helpful and shows compassion an interest in my health.","ratings":[],"overallRating":{"name":"Likelihood to recommend","value":5}},{"id":1809670804,"surveyKey":"10645509242","source":"PG Survey- MD","mentionTime":"2026-02-01T05:00:00Z","wordCount":19,"comment":"Elizabeth Mann is very thorough and explains things carefully and completely so I feel my health care is foremost.","ratings":[],"overallRating":{"name":"Likelihood to recommend","value":5}},{"id":1792311334,"surveyKey":"10629325231","source":"PG Survey- MD","mentionTime":"2026-01-31T05:00:00Z","wordCount":10,"comment":"Elizabeth Mann does an excellent job and is very knowledgeable.","ratings":[],"overallRating":{"name":"Likelihood to recommend","value":5}},{"id":1768122875,"surveyKey":"10330828866","source":"PG Survey- MD","mentionTime":"2025-12-08T05:00:00Z","wordCount":39,"comment":"Today was my first visit with Dr Mann. She was excellent. Very concerned. She offered many helpful suggestions. Gave good advice. Plans for my future. I liked her very much and look forward to seeing her in 4 weeks.","ratings":[],"overallRating":{"name":"Likelihood to recommend","value":5}},{"id":1768122876,"surveyKey":"10330829675","source":"PG Survey- MD","mentionTime":"2025-12-08T05:00:00Z","wordCount":24,"comment":"I'm very pleased with the nurse practitioner Elizabeth Mann who I see in the weight management clinic. She is very knowledgeable, professional and caring.","ratings":[],"overallRating":{"name":"Likelihood to recommend","value":5}}]
Open Scheduling
Off
My Chart Scheduling
Off
Hospital Affiliations
Years Experience
20
Medical Group Override
Off
Hide Online Scheduling
Off
Override Specialties
Off
Display Middle Name
Off
Override Locations
Off
Primary Specialty Not Schedulable
Off
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