Dr. James A. Knol, MD
- Medicare services, 2020
- 140
- Part D claims, 2019
- 18
- Publications
- 1
- Hospital affiliations
- 2
- Industry payments
- $114
- 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. Knol'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. James A. Knol is a general surgeon in Grand Rapids, Michigan
Dr. Knol practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health.
Dr. Knol's NPI, 1457451296, was assigned on September 22, 2006. Dr. Knol holds Michigan license 4301040766.
- NPI
- 1457451296NPI Registry (opens in a new tab)
- NPI enumeration date
- September 22, 2006
- NPI status
- Active
- Practice phone
- (616) 391-1774
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 78
- Medical school graduation
- 1974
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. James A. Knol practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan
Dr. Knol'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. James A. Knol is affiliated with 2 sites of care and 1 medical group
Dr. Knol's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health. Dr. Knol is also affiliated with University Hospital. The medical group on file is University of Michigan Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James A. Knol's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Knol practices, 2 sites in all. 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 |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James A. Knol is one of 1,095 general surgeons in Michigan
Surgery is Dr. Knol's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Knol is licensed in Michigan.
Specialties and state licenses
- Surgery, MichiganPrimary
General surgeons near Dr. Knol
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. James A. Knol billed Medicare for 140 services in 2020
CMS data shows 140 Medicare services from Dr. Knol across 4 procedure codes in 2020. Medicare paid $3,796 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Knol's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 1712020: 12726%
- Other services
- 2019: 112020: 1318%
Dr. Knol compared with the Michigan median for general surgeons, 2020
- Dr. Knol
- Michigan median
- Medicare services
- 140vs 12611% above
- Part D claims
- 18vs 3040% below
Medians across 1,046 general surgeons in Michigan with Dmand AI profiles that report each measure.
Dr. Knol's most billed Medicare procedure codes, 2020
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. Knol?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Knol and other general surgeons in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James A. Knol's patients have a median age of 71
Across all payers, Dmand AI patient panel data puts Dr. Knol's median patient age at 71, with 0% women.
Dr. Knol's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Dr. James A. Knol wrote 18 Medicare Part D claims in 2019
In 2019, Dr. Knol wrote 18 Medicare Part D claims. They cover 1 drug, with $179 in total drug cost. In 2018, CMS named 29 claims across 2 drugs.
Dr. Knol's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 292019: 1838%
Drugs named by CMS: 1 in 2019, 2 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. James A. Knol has 1 publication on record
Dmand AI links 1 paper to Dr. Knol in 2012. Dr. Knol's most frequent co-authors are Mary Uan-Sian Feng, MD and David E. Smith, MD.
Dr. Knol's most frequent co-authors
Recent publications by Dr. Knol
See who Dr. Knol researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Knol works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. James A. Knol received $114 in industry payments from 2022 to 2024
CMS Open Payments shows 2 general payments to Dr. Knol from 2 drug and device companies from 2022 to 2024. Food and beverage make up the largest share, 88% of the total. Integra LifeSciences Corporation paid the most, $100.
General payments to Dr. Knol by program year, 2022 to 2024
General payments to Dr. Knol by kind, 2022 to 2024
- Food and beverage$10088%
- Education$1312%
Companies that paid Dr. Knol the most, 2022 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. James A. Knol'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. James A. Knol
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. James A. Knol's NPI number?
Dr. James A. Knol's NPI number is 1457451296. It was assigned on September 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. James A. Knol?
Dr. James A. Knol is a general surgeon in Grand Rapids, Michigan. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. James A. Knol practice?
Dr. Knol practices at 100 Michigan St NE, Grand Rapids, MI 49503. Dr. Knol's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health.
What is Dr. James A. Knol's office phone number?
The practice phone on file for Dr. Knol is (616) 391-1774.
What is Dr. James A. Knol's medical license number?
Dr. Knol holds Michigan license 4301040766.
Which hospitals is Dr. James A. Knol affiliated with?
Dr. Knol practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan. Dr. Knol is also affiliated with University Hospital.
What medical group is Dr. James A. Knol part of?
Dr. Knol is linked to University of Michigan Health.
Does Dr. James A. Knol accept Medicare?
Yes. CMS data shows Dr. Knol billed Medicare for 140 services in 2020.
What services does Dr. James A. Knol bill to Medicare?
In 2020, Dr. Knol's most billed Medicare services were office visit, established patient (99212), office visit, new patient (99203) and office visit, established patient (99213).
What drugs does Dr. James A. Knol prescribe most?
In 2019 Medicare Part D data, Dr. Knol's most prescribed drugs by claims were Sodium Chloride.
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Has Dr. James A. Knol received payments from drug or device companies?
CMS Open Payments shows $114 in general payments to Dr. Knol from 2 companies from 2022 to 2024. The largest total came from Integra LifeSciences Corporation.
How long has Dr. James A. Knol been practicing?
Dr. Knol graduated from medical school in 1974, 52 years ago.
Does Dr. James A. Knol do research?
Dmand AI links 1 publication to Dr. Knol.
Who does Dr. James A. Knol publish with?
Dr. Knol's most frequent co-authors are Mary Uan-Sian Feng, MD (1 shared paper) and David E. Smith, MD (1 shared paper).
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