Dr. Theodore J. Vanderkooi, MD
- Medicare services, 2024
- 96
- Medicare patients, 2024
- 104
- Part D claims, 2024
- 120
- Hospital affiliations
- 2
- Industry payments
- $1,776
- Practice address
- 1700 Clinton Street, Muskegon, MI 49443
- Practice phone
- Call (231) 728-4007
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Hackley Hospital - Unit
Acute Care Hospital-Unit · Muskegon, Michigan
Find Dr. Vanderkooi's professional email, personal email and mobile number
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Dr. Theodore J. Vanderkooi is a general surgeon in Muskegon, Michigan
Dr. Vanderkooi practices at Hackley Hospital - Unit in Muskegon, Michigan.
Dr. Vanderkooi's NPI, 1801849120, was assigned on May 18, 2006. Dr. Vanderkooi graduated from University of Michigan Medical School in 1995. Dr. Vanderkooi holds Michigan license 065627.
- NPI
- 1801849120NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2365431038
- NPI enumeration date
- May 18, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (231) 728-4007
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Theodore J. Vanderkooi practices at Hackley Hospital - Unit in Muskegon, Michigan
Dr. Vanderkooi's primary practice is Hackley Hospital - Unit, at 1700 Clinton Street, Muskegon, MI 49443 in Muskegon County. The practice phone is (231) 728-4007.
- Hackley Hospital - Unit1700 Clinton Street, Muskegon, MI 49443 · Muskegon CountyPhone(231) 728-4007
Source: Dmand AI Affiliation Data
Dr. Theodore J. Vanderkooi is affiliated with 3 sites of care and 1 medical group
Dr. Vanderkooi's primary practice is Hackley Hospital - Unit in Muskegon, Michigan. Dr. Vanderkooi is also affiliated with Trinity Health Muskegon Hospital. The medical group on file is Muskegon Surgical Associates. Dmand AI also links Dr. Vanderkooi to 1 more group practice or clinic, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Theodore J. Vanderkooi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Vanderkooi practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hackley Hospital - Unit | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Theodore J. Vanderkooi is one of 1,095 general surgeons in Michigan
Surgery is Dr. Vanderkooi's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Vanderkooi is licensed in Michigan.
Specialties and state licenses
- Surgery, MichiganPrimary
General surgeons near Dr. Vanderkooi
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. Theodore J. Vanderkooi billed Medicare for 96 services in 2024
CMS data shows 96 Medicare services from Dr. Vanderkooi across 4 procedure codes in 2024, for 104 Medicare patients. Medicare paid $5,525 for them.
Dr. Vanderkooi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 762024: 9626%
Where Dr. Vanderkooi's Medicare services took place, 2024
- In an office4042%
- In a facility5658%
Dr. Vanderkooi compared with the Michigan median for general surgeons, 2024
- Dr. Vanderkooi
- Michigan median
- Medicare services
- 96vs 12624% below
- Medicare patients
- 104vs 107Close to median
- Part D claims
- 75vs 302.5 times
Medians across 1,046 general surgeons in Michigan with Dmand AI profiles that report each measure.
Dr. Vanderkooi'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. Vanderkooi and other general surgeons in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Theodore J. Vanderkooi treated 104 Medicare patients in 2024, average age 74
CMS counts 104 Medicare patients who saw Dr. Vanderkooi in 2024. The largest group is 65 to 74, with 39 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 29% are also on Medicaid. Their average risk score is 1.68, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Vanderkooi's median patient age at 61, with 41% women.
Dr. Vanderkooi's Medicare patients by age, 2024
Dr. Vanderkooi's Medicare patients by sex, 2024
- Women4745%
- Men5755%
Chronic conditions among Dr. Vanderkooi's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis50%
- Mood disorders41%
- Depression40%
- Anxiety38%
- COPD34%
- Heart failure33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Vanderkooi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women41%
- Men59%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Theodore J. Vanderkooi wrote 120 Medicare Part D claims in 2024
In 2024, Dr. Vanderkooi wrote 120 Medicare Part D claims for 67 patients. 97% of them were for generic drugs. CMS names the drug for 75 of them, across 3 drugs with 11 or more claims each, at $194 in total drug cost. In 2023, CMS named 59 claims across 2 drugs.
Dr. Vanderkooi's Part D claims by kind of drug, 2024
- Generic116 claims97%
- Brand-name and other4 claims3%
Dr. Vanderkooi'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. Vanderkooi's Part D claims, 2024
- Opioids43%51 of 120 claims
- Antibiotics33%39 of 120 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: 592024: 7527%
Drugs named by CMS: 3 in 2024, 2 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. Theodore J. Vanderkooi ranks in the 43rd percentile for colonoscopy in Medicare
Dr. Vanderkooi accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 13 procedures of colonoscopy by Dr. Vanderkooi, more than 43% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Vanderkooi ranks in Medicare procedure volume
- Colonoscopy
- 43rd percentile13 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 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. Theodore J. Vanderkooi received $1,776 in industry payments from 2016 to 2025
CMS Open Payments shows 36 general payments to Dr. Vanderkooi from 11 drug and device companies from 2016 to 2025. Travel and lodging make up the largest share, 73% of the total. Intuitive Surgical, Inc. paid the most, $1,419.
General payments to Dr. Vanderkooi by program year, 2016 to 2025
General payments to Dr. Vanderkooi by kind, 2016 to 2025
- Travel and lodging$1,30173%
- Food and beverage$47527%
Companies that paid Dr. Vanderkooi 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. Theodore J. Vanderkooi graduated from University of Michigan Medical School
Dr. Vanderkooi graduated from University of Michigan Medical School in 1995.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Theodore J. Vanderkooi'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 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. Theodore J. Vanderkooi
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. Theodore J. Vanderkooi's NPI number?
Dr. Theodore J. Vanderkooi's NPI number is 1801849120. It was assigned on May 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Theodore J. Vanderkooi?
Dr. Theodore J. Vanderkooi is a general surgeon in Muskegon, Michigan. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Theodore J. Vanderkooi practice?
Dr. Vanderkooi practices at 1700 Clinton Street, Muskegon, MI 49443. Dr. Vanderkooi's primary practice is Hackley Hospital - Unit in Muskegon, Michigan. Dmand AI also links Dr. Vanderkooi to 1 group practice or clinic.
What is Dr. Theodore J. Vanderkooi's office phone number?
The practice phone on file for Dr. Vanderkooi is (231) 728-4007.
What is Dr. Theodore J. Vanderkooi's medical license number?
Dr. Vanderkooi holds Michigan license 065627.
Which hospitals is Dr. Theodore J. Vanderkooi affiliated with?
Dr. Vanderkooi is affiliated with Trinity Health Muskegon Hospital. Dmand AI links Dr. Vanderkooi to 1 more hospital.
What medical group is Dr. Theodore J. Vanderkooi part of?
Dr. Vanderkooi is linked to Muskegon Surgical Associates.
Does Dr. Theodore J. Vanderkooi accept Medicare?
Yes. CMS data shows Dr. Vanderkooi billed Medicare for 96 services in 2024, and Dr. Vanderkooi accepts Medicare assignment.
How many Medicare patients does Dr. Theodore J. Vanderkooi see?
CMS counts 104 Medicare patients who saw Dr. Vanderkooi in 2024, with an average age of 74.
What services does Dr. Theodore J. Vanderkooi bill to Medicare?
In 2024, Dr. Vanderkooi's most billed Medicare services were hospital inpatient care (99231), office visit, established patient (99213) and hospital inpatient care (99221).
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Where did Dr. Theodore J. Vanderkooi go to medical school?
Dr. Vanderkooi graduated from University of Michigan Medical School in 1995.
What drugs does Dr. Theodore J. Vanderkooi prescribe most?
In 2024 Medicare Part D data, Dr. Vanderkooi's most prescribed drugs by claims were Tramadol HCl, Metronidazole and Omeprazole.
Has Dr. Theodore J. Vanderkooi received payments from drug or device companies?
CMS Open Payments shows $1,776 in general payments to Dr. Vanderkooi from 11 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Theodore J. Vanderkooi been practicing?
Dr. Vanderkooi graduated from medical school in 1995, 31 years ago.
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