Dr. Jacob Kalkman, MD
- Part D claims, 2024
- 25
- Hospital affiliations
- 1
- Industry payments
- $138
- State license
- 1
- Year NPI issued
- 2024
- Practice address
- 100 Michigan St NE, Grand Rapids, MI 49503
- Practice phone
- Call (616) 391-1774
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Kalkman'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. Jacob Kalkman is a general surgeon in Grand Rapids, Michigan
Dr. Kalkman practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health.
Dr. Kalkman's NPI, 1225880131, was assigned on April 3, 2024. Dr. Kalkman holds Michigan license 4351052913.
- NPI
- 1225880131NPI Registry (opens in a new tab)
- NPI enumeration date
- April 3, 2024
- NPI status
- Active
- Practice phone
- (616) 391-1774
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Jacob Kalkman practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan
Dr. Kalkman's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth, at 100 Michigan St NE, Grand Rapids, MI 49503 in Kent County. The practice phone is (616) 391-1774.
- Corewell Health Grand Rapids Hospitals - Butterworth100 Michigan St NE, Grand Rapids, MI 49503 · Kent CountyPhone(616) 391-1774
Source: Dmand AI Affiliation Data
Dr. Jacob Kalkman is affiliated with 1 site of care
Dr. Kalkman's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jacob Kalkman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kalkman practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Corewell Health Grand Rapids Hospitals - Butterworth | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Corewell Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jacob Kalkman is one of 1,095 general surgeons in Michigan
Surgery is Dr. Kalkman's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Kalkman is licensed in Michigan.
Specialties and state licenses
- Surgery, MichiganPrimary
General surgeons near Dr. Kalkman
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. Jacob Kalkman's patients have a median age of 38
Across all payers, Dmand AI patient panel data puts Dr. Kalkman's median patient age at 38, with 75% women.
Dr. Kalkman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 38
Patient panel by sex, all payers
- Women75%
- Men25%
Source: Dmand AI Patient Panel Data
Dr. Jacob Kalkman wrote 25 Medicare Part D claims in 2024
In 2024, Dr. Kalkman wrote 25 Medicare Part D claims for 11 patients. 100% of them were for generic drugs.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Jacob Kalkman received $138 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Kalkman from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $138.
Companies that paid Dr. Kalkman the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Jacob Kalkman'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Jacob Kalkman
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. Jacob Kalkman's NPI number?
Dr. Jacob Kalkman's NPI number is 1225880131. It was assigned on April 3, 2024, and it is active in the NPI Registry.
What kind of doctor is Dr. Jacob Kalkman?
Dr. Jacob Kalkman is a general surgeon in Grand Rapids, Michigan. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Jacob Kalkman practice?
Dr. Kalkman practices at 100 Michigan St NE, Grand Rapids, MI 49503. Dr. Kalkman's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health.
What is Dr. Jacob Kalkman's office phone number?
The practice phone on file for Dr. Kalkman is (616) 391-1774.
What is Dr. Jacob Kalkman's medical license number?
Dr. Kalkman holds Michigan license 4351052913.
Which hospitals is Dr. Jacob Kalkman affiliated with?
Dr. Kalkman practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan.
Has Dr. Jacob Kalkman received payments from drug or device companies?
CMS Open Payments shows $138 in general payments to Dr. Kalkman from 1 company from 2024 to 2024. The largest total came from Abbvie Inc.
How long has Dr. Jacob Kalkman been practicing?
Dr. Kalkman's NPI was assigned in 2024.
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