Karl S. Demarco, MD
Family Medicine Physician · Tyndall, SD
Karl S. Demarco, MD is a family medicine physician with a practice address in Tyndall, South Dakota, and NPI 1205483781, issued on Aug 20, 2019. Check the license (South Dakota 13975, as entered in NPPES) on the South Dakota Board of Medical and Osteopathic Examiners; the Medicare figures below come from public CMS files.
- Name
- Karl S. Demarco
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 13975 SD
Self-reported in NPPES; status is on the state search - Practice location
- 410 W 16TH Ave, Tyndall, SD 57066
- Phone
- (605) 589-2100
- Enumerated
- Aug 20, 2019
- Record last updated
- Sep 12, 2024
- Fax
- (605) 589-2115
- Medicare enrollment
- Enrolled (PECOS I20221206001108); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 410 W 16TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica Bares, DPTPhysical Therapist1497432231
- Taylor DiedePhysical Therapist1598643777
- Amber Evenson, PA-CPhysician Assistant1285003772
- Kimberly Hinz, PA-CPhysician Assistant1679810931
- Douglas Johnson, PHARMACISTPharmacist1720164155
- Janelle Kriz, CNPFamily Nurse Practitioner1427674779
Verify Karl S. Demarco in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Dakota Board of Medical and Osteopathic Examiners
Search for license 13975Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average family medicine physician in 2024
1,993 Medicare Part D claims for 153 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 14 claims were for opioids.
Most prescribed
- Losartan Potassium143 claims
- Rosuvastatin Calcium87 claims
- Atorvastatin Calcium84 claims
- Prednisone75 claims
- Furosemide71 claims
- Duloxetine Hcl68 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: $36.49
2 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 55,478 providers of this specialty with any payment received $902.55 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.
Bills Medicare through one group practice
- St Michael's Hospital, Inc.Tyndall, SD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
4 family medicine physician records list a practice address in Tyndall
They are 4 of the 33 NPPES records with a practice address in Tyndall, and 601 family medicine physician records in South Dakota.
All 4 in Tyndall → All 601 in South Dakota → Every provider in Tyndall →
Other family medicine physician records in South Dakota
- Adeem Abdulwahab, M.DSioux Falls, SD1720432073
- Gordon Abernathie, D.O.Rapid City, SD1053316174
- Kyle Adams, D.O.Rapid City, SD1881009496
- Mary Ahlers, DOBrookings, SD1609301365
- Alese Allerdings, M.D.De Smet, SD1285926261
- Jay Allison, MDSioux Falls, SD1235195041
- E. Amundson, MDSioux Falls, SD1144220914
- Sylvia Anderson, MDFaulkton, SD1790891844
- Wayne Anderson, MDSpearfish, SD1902834914
- Roberto Anel, MDSioux Falls, SD1841411444
Common questions
What is Karl S. Demarco, MD's NPI number?
Karl S. Demarco, MD's National Provider Identifier (NPI) is 1205483781, issued on Aug 20, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Karl S. Demarco, MD located?
The NPPES record lists a practice address at 410 W 16TH Ave, Tyndall, SD, 57066. Phone: (605) 589-2100. Providers update this record themselves, so call before visiting.
How can I verify Karl S. Demarco, MD's license?
NPPES lists South Dakota license number 13975, as entered by the provider. 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 Karl S. Demarco, MD prescribe under Medicare Part D?
In 2024, Karl S. Demarco, MD had 1,993 Medicare Part D claims for 153 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.