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Douglas Aach, MD

Dr. Aach is a general surgeon in the O Fallon area. He is affiliated with Barnes Jewish Hospital and 3 more hospitals.
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Conditions treated

Tap to see related services for each condition and more details about our calculations.

Top 25%
374 doctors
Top 15%
374 doctors
Top 5%
186 doctors
Dr. Aach saw more digestive tract conditions patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
385 doctors
Top 15%
385 doctors
Top 5%
192 doctors
Dr. Aach saw more vascular disease patients than 85% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
54 doctors
Top 15%
54 doctors
Top 5%
26 doctors
Dr. Aach saw more goiter patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
2 doctors
Top 15%
2 doctors
Top 5%
Dr. Aach saw more thyroid nodules patients than 75% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.
Top 25%
226 doctors
Top 15%
226 doctors
Top 5%
112 doctors
Dr. Aach saw more thyroid condition patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
108 doctors
Top 15%
108 doctors
Top 5%
53 doctors
Dr. Aach saw more hernia patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
435 doctors
Top 15%
434 doctors
Top 5%
217 doctors
Dr. Aach saw more pain patients than 85% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
28 doctors
Top 15%
27 doctors
Top 5%
13 doctors
Dr. Aach saw more inguinal hernia patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
403 doctors
Top 15%
404 doctors
Top 5%
201 doctors
Dr. Aach saw more cardiovascular disease (CVD) patients than 85% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
102 doctors
Top 15%
102 doctors
Top 5%
51 doctors
Dr. Aach saw more biliary tract disease patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
9 doctors
Top 15%
8 doctors
Top 5%
4 doctors
Dr. Aach saw more hyperparathyroidism patients than 75% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.
Top 25%
53 doctors
Top 15%
53 doctors
Top 5%
26 doctors
Dr. Aach saw more hemorrhoid patients than 75% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
15 doctors
Top 15%
15 doctors
Top 5%
7 doctors
Dr. Aach saw more ventral hernia patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
56 doctors
Top 15%
56 doctors
Top 5%
27 doctors
Dr. Aach saw more gallstones patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
26 doctors
Top 15%
26 doctors
Top 5%
12 doctors
Dr. Aach saw more lipoma patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
28 doctors
Top 15%
27 doctors
Top 5%
13 doctors
Dr. Aach saw more umbilical hernia patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
56 doctors
Top 15%
56 doctors
Top 5%
28 doctors
Dr. Aach saw more sebaceous cyst patients than 85% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
54 doctors
Top 15%
53 doctors
Top 5%
26 doctors
Dr. Aach saw more breast cancer patients than 75% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
32 doctors
Top 15%
32 doctors
Top 5%
15 doctors
Dr. Aach saw more gas patients than 75% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.
Top 25%
9 doctors
Top 15%
9 doctors
Top 5%
4 doctors
Dr. Aach saw thyroid cancer patients in 2014–2018, but we couldn’t determine whether he was a top doctor for the condition in the Greater St. Louis area. Learn more.
Top 25%
144 doctors
Top 15%
144 doctors
Top 5%
72 doctors
Dr. Aach saw more hemorrhage patients than 95% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
130 doctors
Top 15%
130 doctors
Top 5%
64 doctors
Dr. Aach saw hormonal imbalance patients in 2014–2018, but we couldn’t determine whether he was a top doctor for the condition in the Greater St. Louis area. Learn more.

Related services provided

Top 25%
6 doctors
Top 15%
6 doctors
Top 5%
2 doctors
Dr. Aach saw more hidradenitis patients than 75% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.
Top 25%
9 doctors
Top 15%
9 doctors
Top 5%
4 doctors
Dr. Aach saw more anal fissure patients than 75% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.
Top 25%
27 doctors
Top 15%
27 doctors
Top 5%
13 doctors
Dr. Aach saw head and neck cancers patients in 2014–2018, but we couldn’t determine whether he was a top doctor for the condition in the Greater St. Louis area. Learn more.

Related services provided

Top 25%
7 doctors
Top 15%
7 doctors
Top 5%
3 doctors
Dr. Aach saw more pilonidal cyst patients than 85% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.
Top 25%
11 doctors
Top 15%
10 doctors
Top 5%
5 doctors
Dr. Aach saw more breast cyst patients than 75% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
39 doctors
Top 15%
38 doctors
Top 5%
19 doctors
Dr. Aach saw more colon cancer patients than 85% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
217 doctors
Top 15%
218 doctors
Top 5%
108 doctors
Dr. Aach saw more peripheral vascular disease (PVD) patients than 85% of similar doctors in the Greater St. Louis area in 2014–2018. Learn more.

Related services provided

Top 25%
2 doctors
Top 15%
3 doctors
Top 5%
1 doctor
Dr. Aach saw anal fistula patients in 2014–2018, but we couldn’t determine whether he was a top doctor for the condition in the Greater St. Louis area. Learn more.

Laparoscopic hernia surgery rate

Dr. Aach’s laparoscopic hernia surgery rate is lower than the rate we predicted for his mix of cases and patients.
Dr. Aach 4%
Predicted for his patients 17%

As a patient, you may prefer a doctor who has a higher rate of laparoscopic hernia surgery to reduce scarring and pain compared to traditional open surgery.

Decision factor

Compared to predicted rates calculated for each doctor’s unique mix of cases and patients

  • Lower than our predicted rate
  • Higher than our predicted rate
  • Similar to our predicted rate

Laparoscopic surgery involves smaller incisions, less scarring, and sometimes less pain than traditional open surgery.

To help you understand how Dr. Aach’s rate of laparoscopic hernia surgery compares to a typical doctor who performs hernia surgeries:

  1. We first measure how many of Dr. Aach’s hernia surgeries were performed laparoscopically.
  2. We then analyze the typical practices of all other doctors in the United States who perform hernia surgeries, using a data-driven model to predict the rate of laparoscopic hernia surgeries for patients like Dr. Aach’s.

By comparing these two numbers, you can see whether Dr. Aach’s rate of laparoscopic hernia surgery is lower than, similar to, or higher than predicted.

This prediction adjusts based on the types of patients the doctor sees, so a doctor who treats sicker patients may have a different predicted rate than a doctor who treats healthier patients.

Outpatient gallbladder removal rate

Dr. Aach’s outpatient gallbladder removal rate is higher than the rate we predicted for his mix of cases and patients.
Dr. Aach 88%
Predicted for his patients 75%

As a patient, you may prefer a doctor who has a higher rate of outpatient gallbladder removal to improve your odds of having an uncomplicated recovery after surgery.

Decision factor

Compared to predicted rates calculated for each doctor’s unique mix of cases and patients

  • Lower than our predicted rate
  • Higher than our predicted rate
  • Similar to our predicted rate

Hospitalizations are costly and associated with a higher risk of infections, so avoiding unnecessary hospital stays can save money and improve your odds of having an uncomplicated recovery after surgery. Gallbladder removals are commonly performed in an outpatient setting, avoiding hospitalizations altogether.

To help you understand how Dr. Aach’s rate of outpatient gallbladder removal compares to a typical doctor who performs gallbladder removals:

  1. We first measure how many of Dr. Aach’s gallbladder removals were performed in an outpatient setting.
  2. We then analyze the typical practices of all other doctors in the United States who perform gallbladder removals, using a data-driven model to predict the rate of outpatient gallbladder removal for patients like Dr. Aach’s.

By comparing these two numbers, you can see whether Dr. Aach’s rate of outpatient gallbladder removal is lower than, similar to, or higher than predicted.

This prediction adjusts based on the types of patients the doctor sees, so a doctor who treats sicker patients may have a different predicted rate than a doctor who treats healthier patients.

Outpatient hernia surgery rate

Dr. Aach’s outpatient hernia surgery rate is higher than the rate we predicted for his mix of cases and patients.
Dr. Aach 96%
Predicted for his patients 89%

As a patient, you may prefer a doctor who has a higher rate of outpatient hernia surgery to improve your odds of having an uncomplicated recovery after surgery.

Decision factor

Compared to predicted rates calculated for each doctor’s unique mix of cases and patients

  • Lower than our predicted rate
  • Higher than our predicted rate
  • Similar to our predicted rate

Hospitalizations are costly and associated with a higher risk of infections, so avoiding unnecessary hospital stays can save money and improve your odds of having an uncomplicated recovery after surgery. Hernia surgeries are commonly performed in an outpatient setting, avoiding hospitalizations altogether.

To help you understand how Dr. Aach’s rate of outpatient hernia surgery compares to a typical doctor who performs hernia surgeries:

  1. We first measure how many of Dr. Aach’s hernia surgeries were performed in an outpatient setting.
  2. We then analyze the typical practices of all other doctors in the United States who perform hernia surgeries, using a data-driven model to predict the rate of outpatient hernia surgery for patients like Dr. Aach’s.

By comparing these two numbers, you can see whether Dr. Aach’s rate of outpatient hernia surgery is lower than, similar to, or higher than predicted.

This prediction adjusts based on the types of patients the doctor sees, so a doctor who treats sicker patients may have a different predicted rate than a doctor who treats healthier patients.

Same-day biopsy rate

Dr. Aach’s same-day biopsy rate is higher than the rate we predicted for his mix of cases and patients.
Dr. Aach 80%
Predicted for his patients 53%

As a patient, you may prefer a doctor who has a higher rate of same-day biopsy following mammogram, because early diagnosis of conditions detected by biopsy is important for effective treatment.

Decision factor

Compared to predicted rates calculated for each doctor’s unique mix of cases and patients

  • Lower than our predicted rate
  • Higher than our predicted rate
  • Similar to our predicted rate

When a breast tissue biopsy is indicated following a suspicious finding on mammogram, our data indicates that about a third of all biopsies occur on the same day. As a patient, you may prefer a doctor who has a higher rate of same-day biopsy following mammogram, because early diagnosis of conditions detected by biopsy is important for effective treatment.

To help you understand how Dr. Aach’s rate of same-day biopsy for mammogram compares to a typical doctor who performs mammograms:

  1. We first measure the actual same-day biopsy rate for Dr. Aach’s patients whose mammograms included a suspicious finding that merited a biopsy.
  2. We then analyze the typical practices of all other doctors in the United States who perform mammograms, using a data-driven model to predict the rate of same-day biopsy for patients like Dr. Aach’s.

By comparing these two numbers, you can see whether Dr. Aach’s rate of same-day biopsy is lower than, similar to, or higher than predicted.

This prediction adjusts based on the types of patients the doctor sees, so a doctor who treats sicker patients may have a different predicted rate than a doctor who treats healthier patients.

Locations

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

Office
1414 Cross St
O Fallon, IL 62269
697 miles away
Office
3 Saint Elizabeth Blvd
O Fallon, IL 62269
698 miles away
Belleville Orthopedic Surgeons
4550 Memorial Dr
Belleville, IL 62226
692 miles away

Reviews

Credentials
  • Jewish Hospital of Cincinnati Program
    RESIDENCY
  • University of Missouri-Kansas City School of Medicine
    MEDICAL EDUCATION, 1986

Specializations

    1. Allopathic & Osteopathic Physicians
    2. Surgery

Hospital affiliations

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

  • Barnes Jewish Hospital
    C
    Hospital safety grade (Spring 2019)
  • Protestant Memorial Medical Center
    C
    Hospital safety grade (Spring 2019)
  • SSM Health Saint Louis University Hospital
    C
    Hospital safety grade (Spring 2019)
  • St Elizabeth Hospital
    Hospital safety grade not available

Insurance accepted

Always check coverage with your doctor’s office.

  • Aetna
  • Anthem
  • Arkansas Blue Cross and Blue Shield
  • Assurant Health
  • Banner Health
  • 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
  • CareFirst BlueCross BlueShield
  • Cigna
  • CoreSource
  • Coventry Health Care
  • Cross and Blue Shield of North Carolina
  • Hawaii Medical Assurance Association
  • Health Alliance
  • HealthPartners
  • HealthSCOPE Benefits
  • HealthSmart
  • Highmark Blue Cross Blue Shield
  • Horizon Blue Cross Blue Shield of New Jersey
  • Humana
  • Independence Blue Cross AmeriHealth
  • Medica
  • Medicare
  • Meritain Health
  • PacificSource
  • PreferredOne
  • Premera Blue Cross
  • Priority Health
  • Regence Blue Cross Blue Shield
  • Security Health Plan
  • TRICARE
  • United Healthcare
  • WPS Health Insurance
  • Wellmark Blue Cross and Blue Shield