Dr. Guy P. Van Der Werf, MD
- Medicare services, 2024
- 2,150
- Medicare patients, 2024
- 466
- Part D claims, 2024
- 7,053
- Hospital affiliations
- 3
- Industry payments
- $46
- Practice address
- 2695 Rocky Mountain Ave, Loveland, CO 80538
- Practice phone
- Call (970) 624-4420
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UCHealth Medical Group
Loveland, Colorado
Find Dr. Van Der Werf'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. Guy P. Van Der Werf is a family medicine physician in Loveland, Colorado
Dr. Van Der Werf practices at UCHealth Medical Group in Loveland, Colorado.
Dr. Van Der Werf's NPI, 1538154257, was assigned on September 19, 2005. Dr. Van Der Werf graduated from University of Arizona College of Medicine in 1987. Dr. Van Der Werf holds Colorado license 31317.
- NPI
- 1538154257NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426090804
- NPI enumeration date
- September 19, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (970) 624-4420
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Guy P. Van Der Werf practices at UCHealth Medical Group in Loveland, Colorado
Dr. Van Der Werf's primary practice is UCHealth Medical Group, at 2695 Rocky Mountain Ave, Loveland, CO 80538 in Larimer County. The practice phone is (970) 624-4420.
- UCHealth Medical Group2695 Rocky Mountain Ave, Loveland, CO 80538 · Larimer CountyPhone(970) 624-4420
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Guy P. Van Der Werf is affiliated with 5 sites of care and 1 medical group
Dr. Van Der Werf's primary practice is UCHealth Medical Group in Loveland, Colorado. Dr. Van Der Werf is also affiliated with UCHealth Medical Center of the Rockies. The medical group on file is UCHealth Medical Group. Dmand AI also links Dr. Van Der Werf to 2 more hospitals and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Guy P. Van Der Werf's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Van Der Werf practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCHealth Medical Group | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Guy P. Van Der Werf is one of 2,952 family medicine physicians in Colorado
Family medicine is Dr. Van Der Werf's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Van Der Werf is licensed in Colorado.
Specialties and state licenses
- Family medicine, ColoradoPrimary
Family medicine physicians near Dr. Van Der Werf
Counts of family medicine physicians 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. Guy P. Van Der Werf billed Medicare for 2,150 services in 2024
CMS data shows 2,150 Medicare services from Dr. Van Der Werf across 22 procedure codes in 2024, for 466 Medicare patients. Medicare paid $80,858 for them. Every service was in an office.
Dr. Van Der Werf's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8782024: 99013%
- Other services
- 2023: 4822024: 481No change
- Surgery
- 2023: 3112024: 36016%
- Tests and treatments
- 2023: 2102024: 26627%
- Lab and pathology
- 2023: 262024: 53104%
Dr. Van Der Werf compared with the Colorado median for family medicine physicians, 2024
- Dr. Van Der Werf
- Colorado median
- Medicare services
- 2,150vs 2727.9 times
- Medicare patients
- 466vs 1243.8 times
- Part D claims
- 6,376vs 6809.4 times
Medians across 2,975 family medicine physicians in Colorado with Dmand AI profiles that report each measure.
Dr. Van Der Werf'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. Van Der Werf and other family medicine physicians in Colorado.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Guy P. Van Der Werf treated 466 Medicare patients in 2024, average age 75
CMS counts 466 Medicare patients who saw Dr. Van Der Werf in 2024. The largest group is 65 to 74, with 219 patients. 59% of them have high cholesterol, and 57% have high blood pressure. Their average risk score is 0.88, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Van Der Werf's median patient age at 73, with 31% women.
Dr. Van Der Werf's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Van Der Werf's Medicare patients by sex, 2024
- Women17137%
- Men29563%
Chronic conditions among Dr. Van Der Werf's Medicare patients, 2024
- High cholesterol59%
- High blood pressure57%
- Arthritis38%
- Ischemic heart disease21%
- Anxiety16%
- Atrial fibrillation16%
- Cancer15%
- Diabetes14%
Share of Medicare patients with each condition. A patient can have several.
Dr. Van Der Werf's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women31%
- Men68%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Guy P. Van Der Werf wrote 7,053 Medicare Part D claims in 2024
In 2024, Dr. Van Der Werf wrote 7,053 Medicare Part D claims for 675 patients. 93% of them were for generic drugs. CMS names the drug for 6,376 of them, across 112 drugs with 11 or more claims each, at $278,482 in total drug cost. In 2023, CMS named 5,460 claims across 101 drugs.
Dr. Van Der Werf's Part D claims by kind of drug, 2024
- Generic6,551 claims93%
- Brand-name470 claims7%
- Other32 claims0%
Dr. Van Der Werf'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. Van Der Werf's Part D claims, 2024
- Opioids5%320 of 7,053 claims
- Antibiotics4%306 of 7,053 claims
- Antipsychotics, patients 65 and over0%32 of 7,053 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: 5,4602024: 6,37617%
Drugs named by CMS: 112 in 2024, 101 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. Guy P. Van Der Werf ranks in the 58th percentile for removal of skin lesions in Medicare
Dr. Van Der Werf accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Van Der Werf as offering telehealth. CMS counts 11 procedures of removal of skin lesions by Dr. Van Der Werf, more than 58% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Van Der Werf ranks in Medicare procedure volume
- Removal of skin lesions
- 58th percentile11 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 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. Guy P. Van Der Werf received $46 in industry payments from 2018 to 2019
CMS Open Payments shows 2 general payments to Dr. Van Der Werf from 2 drug and device companies from 2018 to 2019. Education make up the largest share, 65% of the total. Allergan Inc. paid the most, $30.
General payments to Dr. Van Der Werf by program year, 2018 to 2019
General payments to Dr. Van Der Werf by kind, 2018 to 2019
- Education$3065%
- Food and beverage$1635%
Companies that paid Dr. Van Der Werf the most, 2018 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Guy P. Van Der Werf graduated from University of Arizona College of Medicine
Dr. Van Der Werf graduated from University of Arizona College of Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Guy P. Van Der Werf'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 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. Guy P. Van Der Werf
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. Guy P. Van Der Werf's NPI number?
Dr. Guy P. Van Der Werf's NPI number is 1538154257. It was assigned on September 19, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Guy P. Van Der Werf?
Dr. Guy P. Van Der Werf is a family medicine physician in Loveland, Colorado. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Guy P. Van Der Werf practice?
Dr. Van Der Werf practices at 2695 Rocky Mountain Ave, Loveland, CO 80538. Dr. Van Der Werf's primary practice is UCHealth Medical Group in Loveland, Colorado. Dmand AI also links Dr. Van Der Werf to 2 hospitals and 1 group practice or clinic.
What is Dr. Guy P. Van Der Werf's office phone number?
The practice phone on file for Dr. Van Der Werf is (970) 624-4420.
What is Dr. Guy P. Van Der Werf's medical license number?
Dr. Van Der Werf holds Colorado license 31317.
Which hospitals is Dr. Guy P. Van Der Werf affiliated with?
Dr. Van Der Werf is affiliated with UCHealth Medical Center of the Rockies. Dmand AI links Dr. Van Der Werf to 2 more hospitals.
What medical group is Dr. Guy P. Van Der Werf part of?
Dr. Van Der Werf is linked to UCHealth Medical Group.
Does Dr. Guy P. Van Der Werf accept Medicare?
Yes. CMS data shows Dr. Van Der Werf billed Medicare for 2,150 services in 2024, and Dr. Van Der Werf accepts Medicare assignment.
Does Dr. Guy P. Van Der Werf offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Van Der Werf as offering telehealth services.
How many Medicare patients does Dr. Guy P. Van Der Werf see?
CMS counts 466 Medicare patients who saw Dr. Van Der Werf in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. Guy P. Van Der Werf bill to Medicare?
In 2024, Dr. Van Der Werf's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and surgery: heart and blood vessels (36415).
Where did Dr. Guy P. Van Der Werf go to medical school?
Dr. Van Der Werf graduated from University of Arizona College of Medicine in 1987.
What drugs does Dr. Guy P. Van Der Werf prescribe most?
In 2024 Medicare Part D data, Dr. Van Der Werf's most prescribed drugs by claims were Lisinopril, Levothyroxine Sodium and Atorvastatin Calcium.
Has Dr. Guy P. Van Der Werf received payments from drug or device companies?
CMS Open Payments shows $46 in general payments to Dr. Van Der Werf from 2 companies from 2018 to 2019. The largest total came from Allergan Inc.
How long has Dr. Guy P. Van Der Werf been practicing?
Dr. Van Der Werf graduated from medical school in 1987, 39 years ago.
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