Mark Andrew Klaassen, DO
Student in an Organized Health Care Education/Training Program · Lawton, OK
Mark Andrew Klaassen, DO is a student in an organized health care education/training program with a practice address in Lawton, Oklahoma, and NPI 1225886021, issued on May 8, 2024. Check the license with the Oklahoma board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Andrew Klaassen
- Credential
- DO
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- Practice location
- 3401 W Gore Blvd, Lawton, OK 73505
- Phone
- (580) 585-5545
- Enumerated
- May 8, 2024
- Record last updated
- May 8, 2024
- Entity
- Type 1 · individual
8 nearest student in an organized health care education/training program records → All 3,108 in Oklahoma → Look up another NPI →
Also registered at 3401 W Gore Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Susmitha Aluri, MDFamily Medicine Physician1275282048
- Ama Amofah, D.O.Hospitalist Physician1093021016
Verify Mark Andrew Klaassen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oklahoma board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average student in an organized health care education/training program in 2024
116 Medicare Part D claims for 24 beneficiaries, against an average of 185 among the 59,748 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $14.89
1 payment: food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 13,278 providers of this specialty with any payment received $608.08 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Mark Andrew Klaassen among 3,108 student in an organized health care education/training program records in Oklahoma
Mark Andrew Klaassen, DO is one of 3,108 student in an organized health care education/training program records with a practice address in Oklahoma. 12% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 44% of them.
- NPI issued2024 · 44% of these records are older, 39% newer
- In a Medicare fileYes · 12% of these records are
- In the CMS Doctors and Clinicians fileNo · 3% of these records are
- Record last updated2024 · 19% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 390200000X and a Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
28 student in an organized health care education/training program records list a practice address in Lawton
They are 28 of the 2,582 NPPES records with a practice address in Lawton, and 3,108 student in an organized health care education/training program records in Oklahoma.
All 3,108 in Oklahoma → Every provider in Lawton → Student in an Organized Health Care Education/Training Program nationwide →
The 8 student in an organized health care education/training program records with the nearest ZIP codes
- Caitlin CunninghamLawton, OK 735051043723257
- Cameron Dodge, DOLawton, OK 735051982395661
- Ivana Grimm, DOLawton, OK 735051265285266
- Courtney HillLawton, OK 735051023547510
- Brittany Kauffman, DOLawton, OK 735051699520981
- Benjamin Kirkland, DOLawton, OK 735051346967676
- Joshua LamarLawton, OK 735051952144032
- Lucas Marin Salcedo, DOLawton, OK 735051871380964
Common questions
What is Mark Andrew Klaassen, DO's NPI number?
Mark Andrew Klaassen, DO's National Provider Identifier (NPI) is 1225886021, issued on May 8, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Mark Andrew Klaassen, DO located?
The NPPES record lists a practice address at 3401 W Gore Blvd, Lawton, OK, 73505. Phone: (580) 585-5545. Providers update this record themselves, so call before visiting.
How can I verify Mark Andrew Klaassen, DO's license?
Search the Oklahoma board that licenses this profession; the NPPES record confirms identity only.
How much does Mark Andrew Klaassen, DO prescribe under Medicare Part D?
In 2024, Mark Andrew Klaassen, DO had 116 Medicare Part D claims for 24 beneficiaries; the average among student in an organized health care education/training program prescribers was 185. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.