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Internal Medicine, Gastroenterology in Saint Louis, MO
Dr Michael Ansstas, Gastroenterologist in Saint Louis, MO
Michael Ansstas is a gastroenterologist at 11155 Dunn RD Suite 309E in Saint Louis, MO. View phone 314-953-8799 and NPI 1851658728.
- Specialty
- Internal Medicine, Gastroenterology
- Location
- Saint Louis, MO
- NPI
- 1851658728
- Pricing
- Current estimate required
Pricing information
Loa does not yet have a verified provider-submitted price for this listing. Ask the provider and your insurer for a current estimate before scheduling care.
About Internal Medicine, Gastroenterology
Gastroenterology providers evaluate digestive conditions and perform procedures such as colonoscopy and upper endoscopy. Procedure pricing depends on the facility setting and whether sedation is included.
Common services and price guides
- ColonoscopyTypical range: $1,000-$5,000
- Upper Endoscopy (EGD)Typical range: $1,000-$5,000
- Doctor Office VisitTypical range: $100-$350
- New Patient VisitTypical range: $150-$500
CMS Medicare clinician details
For NPI 1851658728, the CMS Doctors and Clinicians National Downloadable File released July 9, 2026 reports Gastroenterology.
- Medicare assignment
- Accepts the Medicare-approved amount
- Graduation year
- 2002
CMS enrollment records list group affiliations including Archbold Medical GROUP, INC. and Hshs Medical Group Inc.
Review the CMS source dataset. Confirm current participation and services directly with the provider.
How to confirm pricing with Michael Ansstas M.D.
Published and estimated prices are a starting point. Confirm these details before scheduling to avoid surprises.
Confirm the billing code and setting
Verify the CPT or other billing code and whether care is billed as an office, outpatient, or hospital service.
Check insurance benefits
Ask your insurer about network status, deductible progress, prior authorization, and expected patient responsibility.
Get an itemized estimate
Compare the written estimate with source-labeled prices and ask which additional services could be billed.
Related provider profiles
Provider record and data sources
Michael Ansstas M.D. is published from source-labeled provider data. Registry classifications, practice locations, network participation, and contact information can change, so verify current details before care, billing, or referral.
- Primary taxonomyInternal Medicine, Gastroenterology (207RG0100X)
- NPI record datesEnumerated April 17, 2012; certified October 27, 2025
- Other registry locationsAlton, IL and O Fallon, IL
Source: NPI Registry. Source record updated October 27, 2025. Loa profile refreshed Jul 21, 2026.
Frequently asked questions
Can I see prices for Michael Ansstas M.D.?
Loa does not yet have a verified provider-submitted price for Michael Ansstas M.D.. Ask the office for a written self-pay estimate and compare nearby source-labeled prices before scheduling.
What information is shown for Michael Ansstas M.D.?
This profile shows public provider information for Internal Medicine, Gastroenterology in Saint Louis, MO, including contact details, NPI source information, and source-labeled price context when available.
What NPI taxonomy is listed for Michael Ansstas M.D.?
Michael Ansstas M.D. is listed as an NPI individual under Internal Medicine, Gastroenterology (207RG0100X). Registry classifications can change and do not guarantee that every listed service is currently offered.
When was NPI 1851658728 assigned to Michael Ansstas M.D.?
The NPI Registry lists April 17, 2012 as the enumeration date for NPI 1851658728. The record certification date is October 27, 2025. These are registry dates, not necessarily the date the provider began practicing.
What Medicare specialty does CMS list for Michael Ansstas M.D.?
The CMS Doctors and Clinicians file lists Gastroenterology for NPI 1851658728. Medicare enrollment details can change, so confirm current credentials, participation, and services directly.
Does Michael Ansstas M.D. accept Medicare assignment?
The CMS record indicates that Michael Ansstas M.D. accepts the Medicare-approved amount as payment in full. Confirm current participation, network status, and patient responsibility before care.
How should I confirm care details with Michael Ansstas M.D.?
Contact the office before care to confirm the location, appointment availability, network participation, exact service and billing code, and all expected professional or facility fees.
How can Michael Ansstas M.D. update this profile?
The provider or an authorized representative can claim the profile or suggest a correction. Loa reviews submitted changes before publishing them.