Jeffrey Patrick Michalak, DO
Gastroenterology Physician · Dakota Dunes, SD
Jeffrey Patrick Michalak, DO is a gastroenterology physician with a practice address in Dakota Dunes, South Dakota, and NPI 1962622431, issued on Apr 26, 2007. Check the license (South Dakota 8388, as entered in NPPES) on the South Dakota Board of Medical and Osteopathic Examiners; the Medicare figures below come from public CMS files.
- Name
- Jeffrey Patrick Michalak
- Credential
- DO
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 8388 SD
DO-04307 IA
933 NE
Self-reported in NPPES; status is on the state search - Practice location
- 575 N Sioux Point Road, Dakota Dunes, SD 57049
- Phone
- (605) 217-2667
- Enumerated
- Apr 26, 2007
- Record last updated
- Dec 10, 2025
- Fax
- (605) 217-2900
- Medicaid IDs
- 1962622431 NH
1962622431 IA
1962622431 SD - Medicare enrollment
- Enrolled (PECOS I20120725001029); accepts Medicare assignment
- Medical or professional school
- Kansas City University Of Med & Biosciences, College Of Osteo Med, 2005
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 49 in South Dakota → Look up another NPI →
Also registered at 575 N Sioux Point Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michelle Daffer, MDDermatology Physician1396711867
- James Hegvik, MDSurgery Physician1780099135
- Raymond Kuwahara, MDDermatology Physician1376512244
- Joshua Locker, MDOrthopaedic Surgery Physician1487036190
- Douglas Martin, MDOccupational Medicine Physician1689636532
- Elijah Miller, DOOrthopaedic Surgery Physician1386191682
Verify Jeffrey Patrick Michalak 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 8388Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.3 times the Medicare Part D claims of the average gastroenterology physician in 2024
3,524 Medicare Part D claims for 1,099 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Pantoprazole Sodium957 claims
- Sod Sulf-Potass Sulf-Mag Sulf536 claims
- Omeprazole291 claims
- Dexlansoprazole Dr243 claims
- Lansoprazole178 claims
- Colestipol Hcl112 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.
Industry payments in 2024: $287.72
15 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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.
Bills Medicare through one group practice
- Cnos PCSioux City, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jeffrey Patrick Michalak among 49 gastroenterology physician records in South Dakota
Jeffrey Patrick Michalak, DO is one of 49 gastroenterology physician records with a practice address in South Dakota. 76% 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 49% of them.
- NPI issued2007 · 49% of these records are older, 41% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2005 · median 2009 among the 32 with a school on file
- Record last updated2025 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a South Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
5 gastroenterology physician records list a practice address in Dakota Dunes
They are 5 of the 326 NPPES records with a practice address in Dakota Dunes, and 49 gastroenterology physician records in South Dakota.
All 49 in South Dakota → Every provider in Dakota Dunes → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Sarah Bligh, MDDakota Dunes, SD 570491225266364
- Michael Persaud, DODakota Dunes, SD 570491235192402
- Kevin Preston, D.O.Dakota Dunes, SD 570491396717229
- Alexander Sarkisian, M.D.Dakota Dunes, SD 570491174985568
- Kesiena AkpoigbeYankton, SD 570781922599612
- Steve Gutnik, MDYankton, SD 570781295736205
- John Barker, M.D.Sioux Falls, SD 571051063486975
- Jorge Gilbert, M.D.Sioux Falls, SD 571051205831377
Common questions
What is Jeffrey Patrick Michalak, DO's NPI number?
Jeffrey Patrick Michalak, DO's National Provider Identifier (NPI) is 1962622431, issued on Apr 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jeffrey Patrick Michalak, DO located?
The NPPES record lists a practice address at 575 N Sioux Point Road, Dakota Dunes, SD, 57049. Phone: (605) 217-2667. Providers update this record themselves, so call before visiting.
How can I verify Jeffrey Patrick Michalak, DO's license?
NPPES lists South Dakota license number 8388, 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 Jeffrey Patrick Michalak, DO prescribe under Medicare Part D?
In 2024, Jeffrey Patrick Michalak, DO had 3,524 Medicare Part D claims for 1,099 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.