Randall Fenner, M.D.
Endocrinology, Diabetes & Metabolism Physician · Sioux Falls, SD
Randall Fenner, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Sioux Falls, South Dakota, and NPI 1073780375, issued on May 15, 2008. Check the license on the South Dakota Board of Medical and Osteopathic Examiners; the Medicare figures below come from public CMS files.
- Name
- Randall Fenner
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- Practice location
- 1305 W 18TH St, Sioux Falls, SD 57105
- Phone
- (605) 328-8700
- Enumerated
- May 15, 2008
- Entity
- Type 1 · individual
Also registered at 1305 W 18TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Beth AbrahamsonNeonatal Nurse Practitioner1013047380
- Unknown AbubakarStudent in an Organized Health Care Education/Training Program1235020959
- Mamoon AhmedHospitalist Physician1679184360
- Sameer Ahmed, MDHospitalist Physician1619549292
- Swetha Alapati, MDInternal Medicine Physician1982051421
- Joseph Alex, MDEmergency Medicine Physician1407484819
Verify Randall Fenner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Dakota Board of Medical and Osteopathic ExaminersCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
9% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
2,493 Medicare Part D claims for 378 beneficiaries, against an average of 2,739 among the 6,176 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Levothyroxine Sodium500 claims
- Metformin Hcl Er125 claims
- Glimepiride98 claims
- Methimazole95 claims
- Ozempic95 claims
- Synthroid93 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.
The Medicare quality score for 2023: 94 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $184.85
11 payments, mostly food and beverage; the largest payer was Medtronic, Inc.. The 4,299 providers of this specialty with any payment received $6,068.67 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.
2 hospital and facility affiliations
- Sanford ClinicSioux Falls, SD
- Sanford Medical CenterSioux Falls, SD
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Endocrinology, Diabetes & Metabolism Physician providers in South Dakota
There are 17 endocrinology, diabetes & metabolism physician records in South Dakota.
Other endocrinology, diabetes & metabolism physician records in South Dakota
- Richard Barth, M.D.Sioux Falls, SD1659375038
- William Blankenship, MDDakota Dunes, SD1104890888
- Lorayne Ann Chua, M.D.Sioux Falls, SD1700237914
- Richard Crawford, MDSioux Falls, SD1164528261
- Marie Angelica Diaz, M.D.Sioux Falls, SD1588072532
- Tracey Domangue, RNSioux Falls, SD1548139280
- Juliana Ferri Guerra, MDSioux Falls, SD1003435579
- Natalie Kappus, D.O.Sioux Falls, SD1649626037
- Sonalika Khachikian, MDRapid City, SD1699934067
- Charles Longo, M.D.Sioux Falls, SD1841266608
Common questions
What is Randall Fenner, M.D.'s NPI number?
Randall Fenner, M.D.'s National Provider Identifier (NPI) is 1073780375, issued on May 15, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Randall Fenner, M.D. located?
The NPPES record lists a practice address at 1305 W 18TH St, Sioux Falls, SD, 57105. Phone: (605) 328-8700. Providers update this record themselves, so call before visiting.
How can I verify Randall Fenner, M.D.'s license?
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 Randall Fenner, M.D. prescribe under Medicare Part D?
In 2024, Randall Fenner, M.D. had 2,493 Medicare Part D claims for 378 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,739. Part D covers Medicare prescriptions only.
What is Randall Fenner, M.D.'s Medicare quality score?
The 2023 MIPS final score is 94 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.