Lamar Wilbur Koistinen, DDS
Dentist · De Smet, SD
Lamar Wilbur Koistinen, DDS is a dentist with a practice address in De Smet, South Dakota, and NPI 1134567746, issued on Jun 6, 2013. Check the license (South Dakota 413, as entered in NPPES) with the South Dakota board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Lamar Wilbur Koistinen
- Credential
- DDS
- Primary taxonomy
- Dentist 122300000X
- License number
- 413 SD
Self-reported in NPPES; status is on the state search - Practice location
- 401 Prairie Ave SW, De Smet, SD 57231
- Phone
- (605) 854-3455
- Enumerated
- Jun 6, 2013
- Record last updated
- Jun 30, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (605) 854-9952
- Entity
- Type 1 · individual
8 nearest dentist records → All 235 in South Dakota → Look up another NPI →
Also registered at 401 Prairie Ave SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Denise Olson, FNP-BCFamily Medicine Physician1760070841
- Devyn ProdoehlGeneral Practice Dentistry1568035160
Verify Lamar Wilbur Koistinen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich South Dakota board licenses this profession
Search for license 413Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average dentist in 2024
32 Medicare Part D claims for 19 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Lamar Wilbur Koistinen among 235 dentist records in South Dakota
Lamar Wilbur Koistinen, DDS is one of 235 dentist records with a practice address in South Dakota. 60% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 58% of them.
- NPI issued2013 · 58% of these records are older, 39% newer
- In a Medicare fileYes · 60% of these records are
- In the CMS Doctors and Clinicians fileNo · 1% of these records are
- Record last updated2014 · 70% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a South Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 dentist record lists a practice address in De Smet
They are 1 of the 24 NPPES records with a practice address in De Smet, and 235 dentist records in South Dakota.
All 235 in South Dakota → Every provider in De Smet → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Solomon Nair, DMDClear Lake, SD 572261093239873
- Mark Bierschbach, DDSMilbank, SD 572521083606180
- William Baune, DDSRosholt, SD 572601508389230
- Camryn BlackwellWatertown, SD 572011922930072
- Clayton Conroy, DDSWatertown, SD 572011922459833
- Leeann Diercks, D.D.S.Watertown, SD 572011174934574
- Sydney Ebben-Carmody, DDSWatertown, SD 572011487357000
- Brody Grantham, DDSWatertown, SD 572011740173871
Common questions
What is Lamar Wilbur Koistinen, DDS's NPI number?
Lamar Wilbur Koistinen, DDS's National Provider Identifier (NPI) is 1134567746, issued on Jun 6, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Lamar Wilbur Koistinen, DDS located?
The NPPES record lists a practice address at 401 Prairie Ave SW, De Smet, SD, 57231. Phone: (605) 854-3455. Providers update this record themselves, so call before visiting.
How can I verify Lamar Wilbur Koistinen, DDS's license?
NPPES lists South Dakota license number 413, as entered by the provider. Search the South Dakota board that licenses this profession; the NPPES record confirms identity only.
How much does Lamar Wilbur Koistinen, DDS prescribe under Medicare Part D?
In 2024, Lamar Wilbur Koistinen, DDS had 32 Medicare Part D claims for 19 beneficiaries; the average among dentist prescribers was 86. 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.