of
JH

John Hammock, MD

Dr. Hammock is a cardiologist in the Quincy area. He is affiliated with Barnes Jewish Hospital and 3 more hospitals.
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Conditions treated

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Top 25%
38k doctors
Top 15%
38k doctors
Top 5%
19k doctors
Dr. Hammock saw more cardiovascular disease (CVD) patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

Related services provided

Top 25%
26k doctors
Top 15%
26k doctors
Top 5%
13k doctors
Dr. Hammock saw more heart disease patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
40k doctors
Top 15%
40k doctors
Top 5%
20k doctors
Dr. Hammock saw more pain patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
10k doctors
Top 15%
10k doctors
Top 5%
5.0k doctors
Dr. Hammock saw more irregular heartbeat patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
3.2k doctors
Top 15%
3.2k doctors
Top 5%
1.6k doctors
Dr. Hammock saw more heart block patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
340 doctors
Top 15%
340 doctors
Top 5%
169 doctors
Dr. Hammock saw more Long QT syndrome patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
13k doctors
Top 15%
13k doctors
Top 5%
6.5k doctors
Dr. Hammock saw more heart valve condition patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
36k doctors
Top 15%
36k doctors
Top 5%
18k doctors
Dr. Hammock saw more vascular disease patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
17k doctors
Top 15%
17k doctors
Top 5%
8.4k doctors
Dr. Hammock saw more atrial fibrillation (Afib) patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
2.0k doctors
Top 15%
2.0k doctors
Top 5%
1.0k doctors
Dr. Hammock saw more AV block patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
17k doctors
Top 15%
17k doctors
Top 5%
8.7k doctors
Dr. Hammock saw more coronary artery disease (CAD) patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
2.9k doctors
Top 15%
2.9k doctors
Top 5%
1.4k doctors
Dr. Hammock saw more enlarged heart patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
13k doctors
Top 15%
13k doctors
Top 5%
6.3k doctors
Dr. Hammock saw more shortness of breath patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
23k doctors
Top 15%
23k doctors
Top 5%
12k doctors
Dr. Hammock saw more anxiety patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
16k doctors
Top 15%
16k doctors
Top 5%
7.8k doctors
Dr. Hammock saw more abnormal breathing patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
17k doctors
Top 15%
17k doctors
Top 5%
8.3k doctors
Dr. Hammock saw more heart failure patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
15k doctors
Top 15%
15k doctors
Top 5%
7.7k doctors
Dr. Hammock saw more congestive heart failure (CHF) patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
12k doctors
Top 15%
12k doctors
Top 5%
6.0k doctors
Dr. Hammock saw more fainting patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
2.0k doctors
Top 15%
2.0k doctors
Top 5%
996 doctors
Dr. Hammock saw psychosis patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.

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Top 25%
10k doctors
Top 15%
10k doctors
Top 5%
5.2k doctors
Dr. Hammock saw more obstructive sleep apnea (OSA) patients than 85% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
23k doctors
Top 15%
23k doctors
Top 5%
11k doctors
Dr. Hammock saw more high cholesterol patients than 75% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
17k doctors
Top 15%
17k doctors
Top 5%
8.7k doctors
Dr. Hammock saw more pneumonia patients than 85% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
919 doctors
Top 15%
919 doctors
Top 5%
459 doctors
Dr. Hammock saw acute respiratory distress syndrome (ARDS) patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.

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Top 25%
14k doctors
Top 15%
14k doctors
Top 5%
6.8k doctors
Dr. Hammock saw more sleep apnea patients than 85% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
34k doctors
Top 15%
34k doctors
Top 5%
17k doctors
Dr. Hammock saw digestive tract conditions patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.

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Top 25%
2.8k doctors
Top 15%
2.8k doctors
Top 5%
1.4k doctors
Dr. Hammock saw more angina patients than 85% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
8.4k doctors
Top 15%
8.4k doctors
Top 5%
4.2k doctors
Dr. Hammock saw dehydration patients in 2014–2019, but we couldn’t determine whether he was a top doctor for the condition nationwide. Learn more.

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Top 25%
6.1k doctors
Top 15%
6.1k doctors
Top 5%
3.1k doctors
Dr. Hammock saw more cardiomyopathy patients than 85% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
16k doctors
Top 15%
16k doctors
Top 5%
8.2k doctors
Dr. Hammock saw more cerebrovascular disease patients than 85% of similar doctors nationwide in 2014–2019. Learn more.

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Top 25%
2.8k doctors
Top 15%
2.8k doctors
Top 5%
1.4k doctors
Dr. Hammock saw more atrial flutter patients than 95% of similar doctors nationwide in 2014–2019. Learn more.

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Locations

Dr. Hammock sees patients and can be reached at the following locations.

Office
927 Broadway St
Quincy, IL 62301
1,066 miles away
Hannibal Clinic Operations
100 Medical Dr
Hannibal, MO 63401
1,073 miles away

Reviews

Credentials
  • Southern Illinois University School of Medicine
    MEDICAL EDUCATION, 2002

Specializations

    1. Allopathic & Osteopathic Physicians
    2. Internal Medicine
    3. Cardiovascular Disease
    1. Allopathic & Osteopathic Physicians
    2. Internal Medicine
    3. Clinical Cardiac Electrophysiology
    1. Allopathic & Osteopathic Physicians
    2. Internal Medicine

Hospital affiliations

Dr. Hammock is able to admit and treat patients at the following hospitals.

  • Barnes Jewish Hospital
    C
    Hospital safety grade (Spring 2019)
  • Illini Community Hospital Illini Community Hospital
    Hospital safety grade not available
  • Keokuk Area Hospital
    Hospital safety grade not available
  • Memorial Hospital
    Hospital safety grade not available

Insurance accepted

Always check coverage with your doctor’s office.

  • Aetna
  • Affinity Health Plan
  • Anthem
  • Arkansas Blue Cross and Blue Shield
  • Assurant Health
  • AvMed
  • Avera
  • Beacon Health Strategies
  • Blue Cross Blue Shield of Arizona
  • Blue Cross Blue Shield of Massachusetts
  • Blue Cross Blue Shield of Michigan
  • Blue Cross and Blue Shield of Alabama
  • Blue Cross and Blue Shield of Florida
  • Blue Cross and Blue Shield of Illinois
  • Blue Cross and Blue Shield of Kansas
  • Blue Cross and Blue Shield of Kansas City
  • Blue Cross and Blue Shield of Louisiana
  • Blue Cross and Blue Shield of Minnesota
  • Blue Cross and Blue Shield of Mississippi
  • Blue Cross and Blue Shield of Montana
  • Blue Cross and Blue Shield of Nebraska
  • Blue Cross and Blue Shield of New Mexico
  • Blue Cross and Blue Shield of North Dakota
  • Blue Cross and Blue Shield of Oklahoma
  • Blue Cross and Blue Shield of Rhode Island
  • Blue Cross and Blue Shield of Texas
  • Blue Cross and Blue Shield of Vermont
  • Blue Cross and Blue Shield of Wyoming
  • Blue Cross of Idaho
  • Blue Shield of California
  • BlueCross BlueShield of South Carolina
  • BlueCross BlueShield of Tennessee
  • Capital District Physicians Health Plan
  • CareFirst BlueCross BlueShield
  • Cigna
  • Community Health Options
  • CommunityCare
  • CoreSource
  • Coventry Health Care
  • Cross and Blue Shield of North Carolina
  • EmblemHealth
  • FirstCare Health Plans
  • GlobalHealth
  • Group Health Cooperative
  • Harvard Pilgrim Health Care
  • Hawaii Medical Assurance Association
  • Health Alliance
  • Health First
  • Health Net
  • HealthPartners
  • HealthSCOPE Benefits
  • HealthSmart
  • Highmark Blue Cross Blue Shield
  • Horizon Blue Cross Blue Shield of New Jersey
  • Humana
  • Independence Blue Cross AmeriHealth
  • MVP Health Care
  • Magellan Health
  • MagnaCare
  • MedCost
  • Medica
  • Medical Mutual of Ohio
  • Medicare
  • Meritain Health
  • Midlands Choice
  • MultiPlan
  • Neighborhood Health Plan
  • Ohio PPO Connect
  • Optima Health
  • Pomco
  • Premera Blue Cross
  • Regence Blue Cross Blue Shield
  • Scott and White Health Plan
  • Security Health Plan
  • Southeastern Indiana Health Organization
  • TRICARE
  • The Health Plan
  • Tufts Health Plan
  • United Healthcare
  • ValueOptions
  • WPS Health Insurance
  • WellMed Medical Management
  • Wellmark Blue Cross and Blue Shield