MARK A. KLAASSEN MD – NPI #1053325589
Orthopaedic Surgery
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
MARK KLAASSEN is an orthopaedic surgeon located in WARSAW, IN. NPPES has assigned the NPI number 1053325589 to MARK KLAASSEN on July 28, 2006. It is a Type-1 NPI, indicating this NPI number is associated with an individual. The primary taxonomy selected by this provider is 207X00000X from the Health Care Provider Taxonomy code set, which is classified as Orthopaedic Surgery.
The NPI profile was last updated on Dec 23, 2025. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for MARK KLAASSEN below.
NPI Profile for
MARK A. KLAASSEN
(about 20 years ago)
STE A
WARSAW, IN 46582 Phone: (574) 264-4163 Fax: (574) 262-9650
FORT WAYNE, IN 46825-5822 Phone: (260) 484-8551 Fax: (260) 482-5060
Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.
Identifiers for MARK KLAASSEN
Identifiers are used to associate other provider identifiers such as Medicaid or other insurers (ie:, Blue Cross, Blue Shield, Aetna, Kaiser-Permanente, etc.), with their NPI number. These identifiers can be used in matching an NPI number to an insurer's records. However, not all providers have such numbers and not all providers choose to include them in their NPI information.
| Description | Issuer | State | Identifier |
|---|---|---|---|
| medicaid | IN | 100206940A |
A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.
| Taxonomy Classification / Specialization | State | License |
|---|---|---|
| 207X00000X - Orthopaedic Surgery (Primary) |
IN | 01031923A |
The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.
Additional Information
- Refer to Part B
- Order Durable Medical Equipment
- Refer to Home Health Agency
- Order Power Mobility Devices
MARK KLAASSEN is affiliated with the following medical group(s):
- HOSPITAL
- ELKHART GENERAL HOSPITAL600 E BLVD
ELKHART, IN 46514 - GOSHEN HOSPITAL200 HIGH PARK AVE
GOSHEN, IN 46526
- ELKHART GENERAL HOSPITAL600 E BLVD
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