Robert Towner Lapp, M.D.
Gastroenterology Physician · Sioux Falls, SD
Robert Towner Lapp, M.D. is a gastroenterology physician with a practice address in Sioux Falls, South Dakota, and NPI 1588829436, issued on Jul 21, 2008. Check the license on the South Dakota Board of Medical and Osteopathic Examiners; the Medicare figures below come from public CMS files.
- Name
- Robert Towner Lapp
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 4301105662 MI
Self-reported in NPPES; status is on the state search - Practice location
- 6100 S Louise Ave Ste 3100, Sioux Falls, SD 57108
- Phone
- (605) 504-1400
- Enumerated
- Jul 21, 2008
- Record last updated
- Oct 31, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150801017369); accepts Medicare assignment
- Medical or professional school
- Sanford School Of Medicine Of University Of South Dakota, 2008
- Entity
- Type 1 · individual
Also registered at 6100 S Louise Ave Ste 3100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Irena Chernatinski, CNPFamily Nurse Practitioner1700133667
- Jodi Julius, NP-CNurse Practitioner1508332842
- Cassie Moser, CNPGastroenterology Physician1912738394
- Kristi Owen, CNPGastroenterology Physician1851072243
- Amanda Richter, CNPFamily Nurse Practitioner1124503016
Verify Robert Towner Lapp in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Dakota Board of Medical and Osteopathic ExaminersCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% more Medicare Part D claims than the average gastroenterology physician in 2024
1,189 Medicare Part D claims for 584 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Peg 3350-Electrolyte373 claims
- Omeprazole210 claims
- Ondansetron Hcl207 claims
- Ondansetron Odt136 claims
- Gavilyte-N77 claims
- Pantoprazole Sodium20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Avera MckennanSioux Falls, SD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gastroenterology Physician providers in South Dakota
There are 49 gastroenterology physician records in South Dakota.
Other gastroenterology physician records in South Dakota
- Backer Abdu, MDSioux Falls, SD1306366760
- Mouhanna Abu Ghanimeh, M.D.Sioux Falls, SD1962812982
- Kesiena AkpoigbeYankton, SD1922599612
- Oksana Aleksenko, MDRapid City, SD1043439631
- Aydamir AlrakawiRapid City, SD1154343051
- Muslim Atiq, M.D.Sioux Falls, SD1548475031
- Lee Austin, M.D.Sioux Falls, SD1306927074
- Dale BachwichRapid City, SD1114978947
- Brett Baloun, MDSioux Falls, SD1245448869
- John Barker, M.D.Sioux Falls, SD1063486975
Common questions
What is Robert Towner Lapp, M.D.'s NPI number?
Robert Towner Lapp, M.D.'s National Provider Identifier (NPI) is 1588829436, issued on Jul 21, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Robert Towner Lapp, M.D. located?
The NPPES record lists a practice address at 6100 S Louise Ave Ste 3100, Sioux Falls, SD, 57108. Phone: (605) 504-1400. Providers update this record themselves, so call before visiting.
How can I verify Robert Towner Lapp, M.D.'s license?
Search the South Dakota Board of Medical and Osteopathic Examiners at https://www.sdbmoe.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert Towner Lapp, M.D. prescribe under Medicare Part D?
In 2024, Robert Towner Lapp, M.D. had 1,189 Medicare Part D claims for 584 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.