Jennifer Ann Fillaus, D.O.
Internal Medicine Physician · Yankton, SD
Jennifer Ann Fillaus, D.O. is an internal medicine physician with a practice address in Yankton, South Dakota, and NPI 1760696967, issued on May 9, 2007. Check the license (South Dakota 14278, as entered in NPPES) on the South Dakota Board of Medical and Osteopathic Examiners; the Medicare figures below come from public CMS files.
- Name
- Jennifer Ann Fillaus
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 14278 SD
810 NE
Self-reported in NPPES; status is on the state search - Practice location
- Yankton Medical Clinic P.C., Yankton, SD 57078
- Phone
- (605) 665-7841
- Enumerated
- May 9, 2007
- Record last updated
- Jul 17, 2023
- Fax
- (605) 665-0546
- Medicare enrollment
- Enrolled (PECOS I20230721002815); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 247 in South Dakota → Look up another NPI →
Verify Jennifer Ann Fillaus 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 14278Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,957 Medicare Part D claims for 348 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 73 claims were for opioids.
Most prescribed
- Amlodipine Besylate191 claims
- Atorvastatin Calcium128 claims
- Furosemide103 claims
- Levothyroxine Sodium91 claims
- Potassium Chloride85 claims
- Losartan Potassium83 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
- Yankton Medical Clinic PCYankton, SD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jennifer Ann Fillaus among 247 internal medicine physician records in South Dakota
Jennifer Ann Fillaus, D.O. is one of 247 internal medicine physician records with a practice address in South Dakota. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 48% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2004 · median 2008 among the 146 with a school on file
- Record last updated2023 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a South Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
15 internal medicine physician records list a practice address in Yankton
They are 15 of the 515 NPPES records with a practice address in Yankton, and 247 internal medicine physician records in South Dakota.
All 247 in South Dakota → Every provider in Yankton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Clarissa Barnes, M.D.Yankton, SD 570781770758757
- Theophilus Bortier, MDYankton, SD 570781861141939
- Gregory Erickson, MDYankton, SD 570781306989090
- Susan Fanta, MDYankton, SD 570781326049313
- John Frank, MDYankton, SD 570781669473443
- Tyler Hanson, M.D.Yankton, SD 570781700800885
- Michael Hein, MDYankton, SD 570781346241148
- Martha Holstein, MDYankton, SD 570781447601141
Common questions
What is Jennifer Ann Fillaus, D.O.'s NPI number?
Jennifer Ann Fillaus, D.O.'s National Provider Identifier (NPI) is 1760696967, issued on May 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer Ann Fillaus, D.O. located?
The NPPES record lists a practice address at Yankton Medical Clinic P.C., Yankton, SD, 57078. Phone: (605) 665-7841. Providers update this record themselves, so call before visiting.
How can I verify Jennifer Ann Fillaus, D.O.'s license?
NPPES lists South Dakota license number 14278, 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 Jennifer Ann Fillaus, D.O. prescribe under Medicare Part D?
In 2024, Jennifer Ann Fillaus, D.O. had 2,957 Medicare Part D claims for 348 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.