Garrett Klaassen
- Medicare patients, 2024
- 15
- Part D claims, 2024
- 88
- Hospital affiliations
- 2
- Industry payments
- $79
- Medical group
- 1
- Practice address
- 1200 Childrens Ave, Oklahoma City, OK 73104
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ou Medical Center-The Children's Ho - Rad CT - HOPD
Acute Care Hospital outpatient department · Oklahoma City, Oklahoma
Find Garrett Klaassen'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.
Garrett Klaassen is a physician assistant in Oklahoma City, Oklahoma
Garrett Klaassen practices at Ou Medical Center-The Children's Ho - Rad CT - HOPD in Oklahoma City, Oklahoma.
Garrett Klaassen's NPI, 1710652540, was assigned on August 13, 2021.
- NPI
- 1710652540NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1052751849
- NPI enumeration date
- August 13, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 29
- Medical school graduation
- 2023
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Garrett Klaassen practices at Ou Medical Center-the Children's Ho - Rad CT - HOPD in Oklahoma City, Oklahoma
Garrett Klaassen's primary practice is Ou Medical Center-the Children's Ho - Rad CT - HOPD, at 1200 Childrens Ave, Oklahoma City, OK 73104.
- Ou Medical Center-the Children's Ho - Rad CT - HOPD1200 Childrens Ave, Oklahoma City, OK 73104
Source: Dmand AI Affiliation Data
Garrett Klaassen is affiliated with 4 sites of care and 1 medical group
Garrett Klaassen's primary practice is Ou Medical Center-The Children's Ho - Rad CT - HOPD in Oklahoma City, Oklahoma. Garrett Klaassen is also affiliated with OU Health University of Oklahoma Medical Center. The medical group on file is OU Health. Dmand AI also links Garrett Klaassen to 1 more hospital and 1 group practice or clinic, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Garrett Klaassen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Garrett Klaassen practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ou Medical Center-The Children's Ho - Rad CT - HOPD | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Garrett Klaassen is one of 1,545 physician assistants in Oklahoma
Physician assistant is Garrett Klaassen's primary specialty in the NPI Registry, under taxonomy code 363A00000X.
Specialties and state licenses
- Physician assistantPrimary
Physician assistants near Garrett Klaassen
Counts of physician assistants 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
Garrett Klaassen treated 15 Medicare patients in 2024, average age 71
CMS counts 15 Medicare patients who saw Garrett Klaassen in 2024. 73% of them have cancer. Their average risk score is 2.05, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Garrett Klaassen's median patient age at 66, with 43% women.
Chronic conditions among Garrett Klaassen's Medicare patients, 2024
- Cancer73%
Share of Medicare patients with each condition. A patient can have several.
Garrett Klaassen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women43%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Garrett Klaassen wrote 88 Medicare Part D claims in 2024
In 2024, Garrett Klaassen wrote 88 Medicare Part D claims for 22 patients. 92% of them were for generic drugs.
Garrett Klaassen's Part D claims by kind of drug, 2024
- Generic81 claims92%
- Brand-name and other7 claims8%
Drug classes CMS tracks in Garrett Klaassen's Part D claims, 2024
- Opioids25%22 of 88 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Garrett Klaassen offers telehealth to Medicare patients
Garrett Klaassen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Garrett Klaassen as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Garrett Klaassen received $79 in industry payments in 2025
CMS Open Payments shows 4 general payments to Garrett Klaassen from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Daiichi Sankyo Inc. paid the most, $64.
Companies that paid Garrett Klaassen the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Garrett Klaassen'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 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 (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) |
| 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 Garrett Klaassen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Garrett Klaassen's NPI number?
Garrett Klaassen's NPI number is 1710652540. It was assigned on August 13, 2021, and it is active in the NPI Registry.
What does Garrett Klaassen specialize in?
Garrett Klaassen is a physician assistant in Oklahoma City, Oklahoma. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Garrett Klaassen practice?
Garrett Klaassen practices at 1200 Childrens Ave, Oklahoma City, OK 73104. Garrett Klaassen's primary practice is Ou Medical Center-The Children's Ho - Rad CT - HOPD in Oklahoma City, Oklahoma. Dmand AI also links Garrett Klaassen to 1 hospital and 1 group practice or clinic.
Which hospitals is Garrett Klaassen affiliated with?
Garrett Klaassen is affiliated with OU Health University of Oklahoma Medical Center. Dmand AI links Garrett Klaassen to 1 more hospital.
What medical group is Garrett Klaassen part of?
Garrett Klaassen is linked to OU Health.
Does Garrett Klaassen accept Medicare?
Yes. CMS lists Garrett Klaassen as accepting Medicare assignment.
Does Garrett Klaassen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Garrett Klaassen as offering telehealth services.
How many Medicare patients does Garrett Klaassen see?
CMS counts 15 Medicare patients who saw Garrett Klaassen in 2024, with an average age of 71.
Has Garrett Klaassen received payments from drug or device companies?
CMS Open Payments shows $79 in general payments to Garrett Klaassen from 2 companies from 2025 to 2025. The largest total came from Daiichi Sankyo Inc.
How long has Garrett Klaassen been practicing?
Garrett Klaassen graduated from medical school in 2023, 3 years ago.
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