Catherine A. Hajek, MD
Internal Medicine Physician · Sioux Falls, SD
Catherine A. Hajek, MD is an internal medicine physician with a practice address in Sioux Falls, South Dakota, and NPI 1528219664, issued on Oct 7, 2008. Check the license (South Dakota 8557, as entered in NPPES) on the South Dakota Board of Medical and Osteopathic Examiners; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Catherine A. Hajek
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 8557 SD
261236 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1309 W 17TH St Ste G01, Sioux Falls, SD 57104
- Phone
- (605) 312-3400
- Enumerated
- Oct 7, 2008
- Record last updated
- Dec 9, 2025
- Entity
- Type 1 · individual
Also registered at 1309 W 17TH St Ste G01
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Colleen SchmidtFamily Nurse Practitioner1447675640
- Raychel Schurman, PA-CPhysician Assistant1447894514
- Shirlene Smook, MDFamily Medicine Physician1578528576
Verify Catherine A. Hajek 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 8557Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
110 internal medicine physician records list a practice address in Sioux Falls
They are 110 of the 6,563 NPPES records with a practice address in Sioux Falls, and 247 internal medicine physician records in South Dakota. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 110 in Sioux Falls → All 247 in South Dakota → Every provider in Sioux Falls →
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 Catherine A. Hajek, MD's NPI number?
Catherine A. Hajek, MD's National Provider Identifier (NPI) is 1528219664, issued on Oct 7, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Catherine A. Hajek, MD located?
The NPPES record lists a practice address at 1309 W 17TH St Ste G01, Sioux Falls, SD, 57104. Phone: (605) 312-3400. Providers update this record themselves, so call before visiting.
How can I verify Catherine A. Hajek, MD's license?
NPPES lists South Dakota license number 8557, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.