NPPES file of Aug 9, 2026

Sherlon Orin Sinclair, M.D.

Internal Medicine Physician · Yankton, SD

Sherlon Orin Sinclair, M.D. is an internal medicine physician with a practice address in Yankton, South Dakota, and NPI 1619506896, issued on Apr 8, 2020. Check the license (South Dakota 14523, as entered in NPPES) on the South Dakota Board of Medical and Osteopathic Examiners; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1619506896
Name
Sherlon Orin Sinclair
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
14523 SD
Self-reported in NPPES; status is on the state search
Practice location
501 Summit St, Yankton, SD 57078
Phone
(605) 653-2859
Enumerated
Apr 8, 2020
Record last updated
Aug 7, 2024
Medicare enrollment
Enrolled (PECOS I20230816002469); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 247 in South Dakota → Look up another NPI →

Also registered at 501 Summit St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Benjamin Aaker, MDEmergency Medicine Physician1811198278
  2. Boakye-Yiadom Adomako, M.D.Internal Medicine Physician1720774771
  3. Cortney Arkfeld, RNMedical-Surgical Registered Nurse1265132245
  4. Theophilus Bortier, MDInternal Medicine Physician1861141939
  5. Susan Bruening, CRNACertified Registered Nurse Anesthetist1093881906
  6. Calley BuckleyCertified Registered Nurse Anesthetist1467918144

Verify Sherlon Orin Sinclair in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersSouth Dakota Board of Medical and Osteopathic Examiners
    Search for license 14523    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the South Dakota license search

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88% fewer Medicare Part D claims than the average internal medicine physician in 2024

387 Medicare Part D claims for 161 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 12 claims were for opioids.

  1. Sherlon Sinclair387
  2. Specialty average3,176

Most prescribed

  1. Eliquis31 claims
  2. Levofloxacin26 claims
  3. Famotidine23 claims
  4. Lactulose17 claims
  5. Prednisone17 claims
  6. Amlodipine Besylate15 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

  1. Sacred Heart Health ServicesYankton, SD

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Sherlon Orin Sinclair among 247 internal medicine physician records in South Dakota

Sherlon Orin Sinclair, M.D. 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 2020, is newer than 89% of them.

  • NPI issued2020 · 89% of these records are older, 9% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 59% of these records are
  • Graduated2014 · median 2008 among the 146 with a school on file
  • Record last updated2024 · 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

  1. Clarissa Barnes, M.D.Yankton, SD 570781770758757
  2. Theophilus Bortier, MDYankton, SD 570781861141939
  3. Gregory Erickson, MDYankton, SD 570781306989090
  4. Susan Fanta, MDYankton, SD 570781326049313
  5. Jennifer Fillaus, D.O.Yankton, SD 570781760696967
  6. John Frank, MDYankton, SD 570781669473443
  7. Tyler Hanson, M.D.Yankton, SD 570781700800885
  8. Michael Hein, MDYankton, SD 570781346241148

Common questions

What is Sherlon Orin Sinclair, M.D.'s NPI number?

Sherlon Orin Sinclair, M.D.'s National Provider Identifier (NPI) is 1619506896, issued on Apr 8, 2020. An NPI identifies a provider in billing; it is not a license.

Where is Sherlon Orin Sinclair, M.D. located?

The NPPES record lists a practice address at 501 Summit St, Yankton, SD, 57078. Phone: (605) 653-2859. Providers update this record themselves, so call before visiting.

How can I verify Sherlon Orin Sinclair, M.D.'s license?

NPPES lists South Dakota license number 14523, 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 Sherlon Orin Sinclair, M.D. prescribe under Medicare Part D?

In 2024, Sherlon Orin Sinclair, M.D. had 387 Medicare Part D claims for 161 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.