Theophilus Bortier, MD
Internal Medicine Physician · Yankton, SD
Theophilus Bortier, MD is an internal medicine physician with a practice address in Yankton, South Dakota, and NPI 1861141939, issued on Mar 23, 2022. Check the license (South Dakota 18263, as entered in NPPES) on the South Dakota Board of Medical and Osteopathic Examiners; the Medicare figures below come from public CMS files.
- Name
- Theophilus Bortier
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 18263 SD
Self-reported in NPPES; status is on the state search - Practice location
- 501 Summit St, Yankton, SD 57078
- Phone
- (605) 668-8000
- Enumerated
- Mar 23, 2022
- Entity
- Type 1 · individual
Also registered at 501 Summit St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Benjamin Aaker, MDEmergency Medicine Physician1811198278
- Boakye-Yiadom Adomako, M.D.Internal Medicine Physician1720774771
- Cortney Arkfeld, RNMedical-Surgical Registered Nurse1265132245
- Susan Bruening, CRNACertified Registered Nurse Anesthetist1093881906
- Calley BuckleyCertified Registered Nurse Anesthetist1467918144
- William Cohen, MDPain Medicine (Physical Medicine & Rehabilitation) Physician1407896301
Verify Theophilus Bortier 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 18263Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
84% fewer Medicare Part D claims than the average internal medicine physician in 2024
444 Medicare Part D claims for 76 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium42 claims
- Metformin Hcl26 claims
- Januvia21 claims
- Amlodipine Besylate19 claims
- Gabapentin18 claims
- Hydrochlorothiazide15 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.
12 internal medicine physician records list a Yankton practice address
They are 12 of the 515 NPPES records with a Yankton practice address, and 331 internal medicine physician records in South Dakota.
All 12 in Yankton → All 331 in South Dakota → Every provider in Yankton →
Other internal medicine physician records in South Dakota
- Mouhanna Abu Ghanimeh, M.D.Sioux Falls, SD1962812982
- Emad Abu Sitta, M.DSioux Falls, SD1194165977
- Joyce Achenjang, M.DPine Ridge, SD1750736096
- Boakye-Yiadom Adomako, M.D.Yankton, SD1720774771
- Comfort Agaba, MDSioux Falls, SD1891221123
- Abdalah Ahmed, MDSioux Falls, SD1457091993
- Munir Ahmed, M.D.Sisseton, SD1962577585
- Shakeel Ahmed, MDRapid City, SD1356773113
- Ghassan Al-Shbool, MDRapid City, SD1215450937
- Swetha Alapati, MDSioux Falls, SD1982051421
Common questions
What is Theophilus Bortier, MD's NPI number?
Theophilus Bortier, MD's National Provider Identifier (NPI) is 1861141939, issued on Mar 23, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Theophilus Bortier, MD located?
The NPPES record lists a practice address at 501 Summit St, Yankton, SD, 57078. Phone: (605) 668-8000. Providers update this record themselves, so call before visiting.
How can I verify Theophilus Bortier, MD's license?
NPPES lists South Dakota license number 18263, 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 Theophilus Bortier, MD prescribe under Medicare Part D?
In 2024, Theophilus Bortier, MD had 444 Medicare Part D claims for 76 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.