Dr. Mark A. Jonker, MD
- Medicare services, 2024
- 15
- Medicare patients, 2024
- 48
- Part D claims, 2024
- 40
- Hospital affiliations
- 3
- Industry payments
- $48,644
- Practice address
- 24 Frank Lloyd Wright Dr, Ann Arbor, MI 48105
- Practice phone
- Call (734) 712-8150
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
IHA General Surgery
Ann Arbor, Michigan
Find Dr. Jonker'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. Mark A. Jonker is a general surgeon in Ann Arbor, Michigan
Dr. Jonker practices at IHA General Surgery in Ann Arbor, Michigan.
Dr. Jonker's NPI, 1780620039, was assigned on June 22, 2006. Dr. Jonker graduated from Medical College of Wisconsin in 2006. Dr. Jonker holds Michigan license 4301108483.
- NPI
- 1780620039NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1355587080
- NPI enumeration date
- June 22, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (734) 712-8150
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark A. Jonker practices at IHA General Surgery in Ann Arbor, Michigan
Dr. Jonker's primary practice is IHA General Surgery, at 24 Frank Lloyd Wright Dr, Ann Arbor, MI 48105 in Washtenaw County. The practice phone is (734) 712-8150.
- IHA General Surgery24 Frank Lloyd Wright Dr, Ann Arbor, MI 48105 · Washtenaw CountyPhone(734) 712-8150
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark A. Jonker is affiliated with 7 sites of care and 3 medical groups
Dr. Jonker's primary practice is IHA General Surgery in Ann Arbor, Michigan. Dr. Jonker is also affiliated with Trinity Health Ann Arbor Hospital. The medical group on file is Trinity Health IHA Medical Group. Dmand AI also links Dr. Jonker to 2 more hospitals, 3 group practices and clinics and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark A. Jonker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Jonker practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| IHA General Surgery | Available with a free account |
| +6 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark A. Jonker is one of 1,095 general surgeons in Michigan
Surgery is Dr. Jonker's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. Jonker's licenses on file in 2 states: Michigan and Massachusetts.
Specialties and state licenses
- Surgery, MichiganPrimary
- Massachusetts license
General surgeons near Dr. Jonker
Counts of general surgeons 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. Mark A. Jonker billed Medicare for 15 services in 2024
CMS data shows 15 Medicare services from Dr. Jonker across 1 procedure code in 2024, for 48 Medicare patients. Medicare paid $1,496 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Jonker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 132024: 1515%
Dr. Jonker compared with the Michigan median for general surgeons, 2024
- Dr. Jonker
- Michigan median
- Medicare services
- 15vs 12688% below
- Medicare patients
- 48vs 10755% below
- Part D claims
- 11vs 3063% below
Medians across 1,046 general surgeons in Michigan with Dmand AI profiles that report each measure.
Dr. Jonker'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Jonker and other general surgeons in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark A. Jonker treated 48 Medicare patients in 2024, average age 68
CMS counts 48 Medicare patients who saw Dr. Jonker in 2024. The largest group is 65 to 74, with 24 patients. 67% of them have high blood pressure, and 65% have high cholesterol. 27% are also on Medicaid. Their average risk score is 1.08, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Jonker's median patient age at 49, with 70% women.
Dr. Jonker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Jonker's Medicare patients by sex, 2024
- Women2858%
- Men2042%
Chronic conditions among Dr. Jonker's Medicare patients, 2024
- High blood pressure67%
- High cholesterol65%
- Arthritis46%
- Mood disorders42%
- Depression38%
- Anxiety25%
- Ischemic heart disease23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Jonker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women70%
- Men30%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark A. Jonker wrote 40 Medicare Part D claims in 2024
In 2024, Dr. Jonker wrote 40 Medicare Part D claims for 20 patients. 95% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $310 in total drug cost. In 2022, CMS named 16 claims across 1 drug.
Dr. Jonker's Part D claims by kind of drug, 2024
- Generic38 claims95%
- Brand-name and other2 claims5%
Dr. Jonker'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.
Part D claims for drugs CMS names, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 162024: 1131%
Drugs named by CMS: 1 in 2024, 1 in 2022.
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
How Dr. Mark A. Jonker takes part in Medicare
Dr. Jonker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Mark A. Jonker received $48,644 in industry payments from 2016 to 2025
CMS Open Payments shows 155 general payments to Dr. Jonker from 8 drug and device companies from 2016 to 2025. Education make up the largest share, 65% of the total. Intuitive Surgical, Inc. paid the most, $43,628.
General payments to Dr. Jonker by program year, 2016 to 2025
General payments to Dr. Jonker by kind, 2016 to 2025
- Education$31,50065%
- Travel and lodging$10,82922%
- Food and beverage$4,3159%
- Speaker and faculty fees$2,0004%
Companies that paid Dr. Jonker 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. Mark A. Jonker graduated from Medical College of Wisconsin
Dr. Jonker graduated from Medical College of Wisconsin in 2006.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark A. Jonker'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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. Mark A. Jonker
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. Mark A. Jonker's NPI number?
Dr. Mark A. Jonker's NPI number is 1780620039. It was assigned on June 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark A. Jonker?
Dr. Mark A. Jonker is a general surgeon in Ann Arbor, Michigan. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Mark A. Jonker practice?
Dr. Jonker practices at 24 Frank Lloyd Wright Dr, Ann Arbor, MI 48105. Dr. Jonker's primary practice is IHA General Surgery in Ann Arbor, Michigan. Dmand AI also links Dr. Jonker to 2 hospitals, 3 group practices and clinics and 2 medical groups.
What is Dr. Mark A. Jonker's office phone number?
The practice phone on file for Dr. Jonker is (734) 712-8150.
What is Dr. Mark A. Jonker's medical license number?
Dr. Jonker holds Michigan license 4301108483, one of the licenses on file in 2 states.
Which states has Dr. Mark A. Jonker been licensed in?
Dmand AI has state licenses on file for Dr. Jonker in Michigan and Massachusetts.
Which hospitals is Dr. Mark A. Jonker affiliated with?
Dr. Jonker is affiliated with Trinity Health Ann Arbor Hospital. Dmand AI links Dr. Jonker to 2 more hospitals.
What medical group is Dr. Mark A. Jonker part of?
Dr. Jonker is linked to Trinity Health IHA Medical Group. Dmand AI links Dr. Jonker to 2 more medical groups.
Does Dr. Mark A. Jonker accept Medicare?
Yes. CMS data shows Dr. Jonker billed Medicare for 15 services in 2024, and Dr. Jonker accepts Medicare assignment.
How many Medicare patients does Dr. Mark A. Jonker see?
CMS counts 48 Medicare patients who saw Dr. Jonker in 2024, with an average age of 68.
Show 5 more questionsShow fewer questions
What services does Dr. Mark A. Jonker bill to Medicare?
In 2024, Dr. Jonker's most billed Medicare services were hospital inpatient care (99222).
Where did Dr. Mark A. Jonker go to medical school?
Dr. Jonker graduated from Medical College of Wisconsin in 2006.
What drugs does Dr. Mark A. Jonker prescribe most?
In 2024 Medicare Part D data, Dr. Jonker's most prescribed drugs by claims were Pantoprazole Sodium.
Has Dr. Mark A. Jonker received payments from drug or device companies?
CMS Open Payments shows $48,644 in general payments to Dr. Jonker from 8 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Mark A. Jonker been practicing?
Dr. Jonker graduated from medical school in 2006, 20 years ago.
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