David W. Landau, MD
Gastroenterology Physician · Hazelwood, MO
David W. Landau, MD is a gastroenterology physician with a practice address in Hazelwood, Missouri, and NPI 1861485476, issued on Aug 30, 2005. Check the license (Missouri R8628, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- David W. Landau
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- R8628 MO
Self-reported in NPPES; status is on the state search - Practice location
- 100 Village SQ, Hazelwood, MO 63042
- Phone
- (314) 355-4010
- Enumerated
- Aug 30, 2005
- Record last updated
- Feb 13, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (314) 355-9484
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 414 in Missouri → Look up another NPI →
Also registered at 100 Village SQ
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robyn Haithcock, DOGastroenterology Physician1497751994
- Gary Koenig, M.D.Gastroenterology Physician1861485724
- David Margolis, MDGastroenterology Physician1538152301
- Tomma Stowers, AGNPAdult Health Nurse Practitioner1225535263
Verify David W. Landau in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license R8628Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average gastroenterology physician in 2024
66 Medicare Part D claims for 12 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Buspirone Hcl13 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.
Industry payments in 2024: $127.20
5 payments; by number, the most common kind was food and beverage; the largest payer was Neurocrine Biosciences, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
David W. Landau among 414 gastroenterology physician records in Missouri
David W. Landau, MD is one of 414 gastroenterology physician records with a practice address in Missouri. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 73% of these records are
- Record last updated2017 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 gastroenterology physician records list a practice address in Hazelwood
They are 4 of the 301 NPPES records with a practice address in Hazelwood, and 414 gastroenterology physician records in Missouri.
All 414 in Missouri → Every provider in Hazelwood → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Robyn Haithcock, DOHazelwood, MO 630421497751994
- Gary Koenig, M.D.Hazelwood, MO 630421861485724
- David Margolis, MDHazelwood, MO 630421538152301
- Patrick McDonough, MDBridgeton, MO 630441770791832
- Raymond Mohrman, MDBridgeton, MO 630441063516375
- Melvin Saltzman, D.O.Bridgeton, MO 630441124025416
- Shanker Das Kundumadam, MDFestus, MO 630281720475403
- Rehan Rafiq, M.D.Festus, MO 630281407924954
Common questions
What is David W. Landau, MD's NPI number?
David W. Landau, MD's National Provider Identifier (NPI) is 1861485476, issued on Aug 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is David W. Landau, MD located?
The NPPES record lists a practice address at 100 Village SQ, Hazelwood, MO, 63042. Phone: (314) 355-4010. Providers update this record themselves, so call before visiting.
How can I verify David W. Landau, MD's license?
NPPES lists Missouri license number R8628, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does David W. Landau, MD prescribe under Medicare Part D?
In 2024, David W. Landau, MD had 66 Medicare Part D claims for 12 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.