Clarissa Grace Barnes, M.D.
Internal Medicine Physician · Yankton, SD
Clarissa Grace Barnes, M.D. is an internal medicine physician with a practice address in Yankton, South Dakota, and NPI 1770758757, issued on Apr 29, 2008. Check the license (South Dakota 8146, as entered in NPPES) on the South Dakota Board of Medical and Osteopathic Examiners; the Medicare figures below come from public CMS files.
- Name
- Clarissa Grace Barnes
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 8146 SD
Self-reported in NPPES; status is on the state search - Practice location
- 1104 W 8TH St, Yankton, SD 57078
- Phone
- (605) 665-7841
- Enumerated
- Apr 29, 2008
- Record last updated
- Jan 16, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (605) 665-0546
- Medicaid ID
- 6007050 SD
- Medicare enrollment
- Enrolled (PECOS I20110920000785); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 2008
- Entity
- Type 1 · individual
Also registered at 1104 W 8TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brent Adams, MDOrthopaedic Surgery Physician1093930521
- Cassandra Arens, PAPhysician Assistant1033522966
- Sarah ArensPhysician Assistant1669912291
- Amber Authier, PA-CMedical Physician Assistant1518679851
- Leann Bassing, M.D.Rheumatology Physician1871784124
- Betty Bisgard, CRNACertified Registered Nurse Anesthetist1265508162
Verify Clarissa Grace Barnes 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 8146Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average internal medicine physician in 2024
101 Medicare Part D claims for 73 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Naloxone Hcl54 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
- Avera MckennanSioux Falls, SD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (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 15 in Yankton → All 247 in South Dakota → Every provider in Yankton →
Other internal medicine physician records in South Dakota
- Ghaith Aboud, M.DWatertown, SD1497117618
- Joyce Achenjang, M.DPine Ridge, SD1750736096
- Boakye-Yiadom Adomako, M.D.Yankton, SD1720774771
- Comfort Agaba, MDSioux Falls, SD1891221123
- Abdalah Ahmed, MDSioux Falls, SD1457091993
- Mohammad Ahmed, M.DSioux Falls, SD1528417821
- Munir Ahmed, M.D.Sisseton, SD1962577585
- Shakeel Ahmed, MDRapid City, SD1356773113
- Hadi Al-Hasnawi, M.DSioux Falls, SD1518351808
- Marc Aldrich, MDRapid City, SD1932209442
Common questions
What is Clarissa Grace Barnes, M.D.'s NPI number?
Clarissa Grace Barnes, M.D.'s National Provider Identifier (NPI) is 1770758757, issued on Apr 29, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Clarissa Grace Barnes, M.D. located?
The NPPES record lists a practice address at 1104 W 8TH St, Yankton, SD, 57078. Phone: (605) 665-7841. Providers update this record themselves, so call before visiting.
How can I verify Clarissa Grace Barnes, M.D.'s license?
NPPES lists South Dakota license number 8146, 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 Clarissa Grace Barnes, M.D. prescribe under Medicare Part D?
In 2024, Clarissa Grace Barnes, M.D. had 101 Medicare Part D claims for 73 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.