Dr. Jeffrey Patrick Michalak, DO
- Medicare services, 2024
- 1,225
- Medicare patients, 2024
- 753
- Part D claims, 2024
- 3,524
- Hospital affiliations
- 5
- Industry payments
- $1,461
- Practice address
- 600 N Sioux Point Road, Dakota Dunes, SD 57049
- Practice phone
- Call (605) 232-3332
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Michalak's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Jeffrey Patrick Michalak is a gastroenterologist in North Sioux City, South Dakota
Dr. Michalak practices at Dunes Surgical Hospital in Dakota Dunes, South Dakota, part of Tenet Healthcare.
Dr. Michalak's NPI, 1962622431, was assigned on April 26, 2007. Dr. Michalak graduated from Kansas City University of Med & Biosciences, College of Osteo Med in 2005. Dr. Michalak holds South Dakota license 8388.
- NPI
- 1962622431NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7911071535
- NPI enumeration date
- April 26, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (605) 232-3332
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jeffrey Patrick Michalak practices at Dunes Surgical Hospital in Dakota Dunes, South Dakota
Dr. Michalak's primary practice is Dunes Surgical Hospital, at 600 N Sioux Point Road, Dakota Dunes, SD 57049 in Union County. The practice phone is (605) 232-3332.
- Dunes Surgical Hospital600 N Sioux Point Road, Dakota Dunes, SD 57049 · Union CountyPhone(605) 232-3332
Source: Dmand AI Affiliation Data
Dr. Jeffrey Patrick Michalak is affiliated with 7 sites of care and 2 medical groups
Dr. Michalak's primary practice is Dunes Surgical Hospital in Dakota Dunes, South Dakota, part of Tenet Healthcare. Dr. Michalak is also affiliated with UnityPoint Health - St. Luke's. The medical group on file is CNOS. Dmand AI also links Dr. Michalak to 3 more hospitals, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jeffrey Patrick Michalak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Michalak practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dunes Surgical Hospital | Available with a free account |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Tenet Healthcare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jeffrey Patrick Michalak is one of 46 gastroenterologists in South Dakota
Gastroenterology is Dr. Michalak's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Michalak's licenses on file in 3 states: South Dakota, Iowa and Nebraska.
Specialties and state licenses
- Gastroenterology, South DakotaPrimary
- Iowa license
- Nebraska license
Gastroenterologists near Dr. Michalak
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Jeffrey Patrick Michalak billed Medicare for 1,225 services in 2024
CMS data shows 1,225 Medicare services from Dr. Michalak across 11 procedure codes in 2024, for 753 Medicare patients. Medicare paid $124,541 for them.
Dr. Michalak's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 8192024: 7459%
- Office and hospital visits
- 2023: 2802024: 2704%
- Other services
- 2023: 1522024: 19629%
- Tests and treatments
- 2023: 02024: 14
Where Dr. Michalak's Medicare services took place, 2024
- In an office32226%
- In a facility90374%
Dr. Michalak compared with the South Dakota median for gastroenterologists, 2024
- Dr. Michalak
- South Dakota median
- Medicare services
- 1,225vs 5352.3 times
- Medicare patients
- 753vs 3482.2 times
- Part D claims
- 3,350vs 7054.8 times
Medians across 43 gastroenterologists in South Dakota with Dmand AI profiles that report each measure.
Dr. Michalak's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Michalak?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Michalak and other gastroenterologists in South Dakota.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jeffrey Patrick Michalak treated 753 Medicare patients in 2024, average age 72
CMS counts 753 Medicare patients who saw Dr. Michalak in 2024. The largest group is 65 to 74, with 458 patients. 75% of them have high cholesterol, and 72% have high blood pressure. 5% are also on Medicaid. Their average risk score is 0.99, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Michalak's median patient age at 64, with 48% women.
Dr. Michalak's Medicare patients by age, 2024
Dr. Michalak's Medicare patients by sex, 2024
- Women41355%
- Men34045%
Chronic conditions among Dr. Michalak's Medicare patients, 2024
- High cholesterol75%
- High blood pressure72%
- Arthritis42%
- Mood disorders27%
- Anxiety26%
- Depression25%
- Diabetes25%
- Chronic kidney disease24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Michalak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women48%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jeffrey Patrick Michalak wrote 3,524 Medicare Part D claims in 2024
In 2024, Dr. Michalak wrote 3,524 Medicare Part D claims for 1,099 patients. 84% of them were for generic drugs. CMS names the drug for 3,350 of them, across 37 drugs with 11 or more claims each, at $356,538 in total drug cost. In 2023, CMS named 3,301 claims across 34 drugs.
Dr. Michalak's Part D claims by kind of drug, 2024
- Generic2,949 claims84%
- Brand-name575 claims16%
Dr. Michalak's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Michalak's Part D claims, 2024
- Antibiotics4%134 of 3,524 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,3012024: 3,3501%
Drugs named by CMS: 37 in 2024, 34 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Jeffrey Patrick Michalak ranks in the 98th percentile for colonoscopy in Medicare
Dr. Michalak accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 364 procedures of colonoscopy by Dr. Michalak, more than 98% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Michalak ranks in Medicare procedure volume
- Colonoscopy
- 98th percentile364 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 96th percentile335 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Jeffrey Patrick Michalak received $1,461 in industry payments from 2016 to 2025
CMS Open Payments shows 86 general payments to Dr. Michalak from 12 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. Takeda Pharmaceuticals U.S.A., Inc. paid the most, $687.
General payments to Dr. Michalak by program year, 2016 to 2025
General payments to Dr. Michalak by kind, 2016 to 2025
- Food and beverage$1,42397%
- Education$383%
Companies that paid Dr. Michalak the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jeffrey Patrick Michalak graduated from Kansas City University of Med & Biosciences, College of Osteo Med
Dr. Michalak graduated from Kansas City University of Med & Biosciences, College of Osteo Med in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jeffrey Patrick Michalak's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Jeffrey Patrick Michalak
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Jeffrey Patrick Michalak's NPI number?
Dr. Jeffrey Patrick Michalak's NPI number is 1962622431. It was assigned on April 26, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Jeffrey Patrick Michalak?
Dr. Jeffrey Patrick Michalak is a gastroenterologist in North Sioux City, South Dakota. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Jeffrey Patrick Michalak practice?
Dr. Michalak practices at 600 N Sioux Point Road, Dakota Dunes, SD 57049. Dr. Michalak's primary practice is Dunes Surgical Hospital in Dakota Dunes, South Dakota, part of Tenet Healthcare. Dmand AI also links Dr. Michalak to 3 hospitals, 2 group practices and clinics and 1 medical group.
What is Dr. Jeffrey Patrick Michalak's office phone number?
The practice phone on file for Dr. Michalak is (605) 232-3332.
What is Dr. Jeffrey Patrick Michalak's medical license number?
Dr. Michalak holds South Dakota license 8388, one of the licenses on file in 3 states.
Which states has Dr. Jeffrey Patrick Michalak been licensed in?
Dmand AI has state licenses on file for Dr. Michalak in South Dakota, Iowa and Nebraska.
Which hospitals is Dr. Jeffrey Patrick Michalak affiliated with?
Dr. Michalak practices at Dunes Surgical Hospital in Dakota Dunes, South Dakota. Dr. Michalak is also affiliated with UnityPoint Health - St. Luke's. Dmand AI links Dr. Michalak to 3 more hospitals.
What medical group is Dr. Jeffrey Patrick Michalak part of?
Dr. Michalak is linked to CNOS. Dmand AI links Dr. Michalak to 1 more medical group.
Does Dr. Jeffrey Patrick Michalak accept Medicare?
Yes. CMS data shows Dr. Michalak billed Medicare for 1,225 services in 2024, and Dr. Michalak accepts Medicare assignment.
How many Medicare patients does Dr. Jeffrey Patrick Michalak see?
CMS counts 753 Medicare patients who saw Dr. Michalak in 2024, with an average age of 72.
Show 5 more questionsShow fewer questions
What services does Dr. Jeffrey Patrick Michalak bill to Medicare?
In 2024, Dr. Michalak's most billed Medicare services were surgery: digestive system (43239), office visit, established patient (99213) and surgery: digestive system (45380).
Where did Dr. Jeffrey Patrick Michalak go to medical school?
Dr. Michalak graduated from Kansas City University of Med & Biosciences, College of Osteo Med in 2005.
What drugs does Dr. Jeffrey Patrick Michalak prescribe most?
In 2024 Medicare Part D data, Dr. Michalak's most prescribed drugs by claims were Pantoprazole Sodium, Sod Sulf-Potass Sulf-Mag Sulf and Omeprazole.
Has Dr. Jeffrey Patrick Michalak received payments from drug or device companies?
CMS Open Payments shows $1,461 in general payments to Dr. Michalak from 12 companies from 2016 to 2025. The largest total came from Takeda Pharmaceuticals U.S.A., Inc.
How long has Dr. Jeffrey Patrick Michalak been practicing?
Dr. Michalak graduated from medical school in 2005, 21 years ago.
Selling to gastroenterology practices?
See gastroenterologists in South Dakota by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card