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KATHERINE LYNN KLAASSEN MD
NPI 1114937034
Psychiatry & Neurology - Geriatric Psychiatry in Muskogee, OK

Active since August 09, 2006
1011 HONOR HEIGHTS DR, DEPARTMENT OF VETERANS AFFAIRS- MEDICAL CENTER, MUSKOGEE, OK 74401(918) 680-3699(918) 680-3701 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Sep 11, 2025, Jul 21, 2022 (2 updates tracked since 2022).

About Katherine Lynn Klaassen Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KATHERINE LYNN KLAASSEN MD (NPI 1114937034) is an individual geriatric psychiatry provider in Muskogee, Oklahoma, licensed in Oklahoma (18532) and active in the NPI registry since August 2006.

NPPES Registry Identity

NPI1114937034
Entity TypeIndividualFemale
Primary Taxonomy2084P0805X
Provider Legal NameKATHERINE LYNN KLAASSENCredential: MD
Location Address1011 HONOR HEIGHTS DR, DEPARTMENT OF VETERANS AFFAIRS- MEDICAL CENTERMuskogee, OK 74401-1318
Mailing Address1011 Honor Heights Dr, Department Of Veterans Affairs- Medical CenterMuskogee, OK 74401-1318 · (918) 680-3699 · Fax (918) 680-3701
Phone(918) 680-3699
Fax(918) 680-3701
Sole ProprietorYes
Enumeration DateAugust 9, 2006
Last NPPES UpdateSeptember 11, 20252 updates tracked since enumeration
✔ NPI 1114937034 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · Geriatric PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0805X
License✔ Licensed in OK · 18532
Definition
Geriatric Psychiatry is a subspecialty with psychiatric expertise in prevention, evaluation, diagnosis and treatment of mental and emotional disorders in the elderly, and improvement of psychiatric care for healthy and ill elderly patients.
Also ListedPsychiatry & Neurology · PsychiatryTaxonomy 2084P0800X · License 18532 (OK)
1011 HONOR HEIGHTS DR, Muskogee, OK 74401
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LESA TRICKETT RRT
Respiratory Therapist, Registered
1011 HONOR HEIGHTS DR
MUSKOGEE, OK 74401
Muskogee County (918) 577-3546
MRS. ALEF NANCY GRAHAM ARNP
Nurse Practitioner (Family)
1011 HONOR HEIGHTS DR
MUSKOGEE, OK 74401
Muskogee County (918) 683-3261
BONNIE M KENNEDY PHARM.D.
Pharmacist
1011 HONOR HEIGHTS DR
MUSKOGEE, OK 74401
Muskogee County (918) 577-3185
BRYAN KEITH SHERMAN
Registered Nurse
1011 HONOR HEIGHTS DR
MUSKOGEE, OK 74401
Muskogee County (405) 830-0503
CHERYL D. CLEVELAND
Registered Nurse (Case Management)
1011 HONOR HEIGHTS DR
MUSKOGEE, OK 74401
Muskogee County (918) 577-3000
LISA LOUISE KIDDIE RN
Registered Nurse (General Practice)
1011 HONOR HEIGHTS DR
MUSKOGEE, OK 74401
Muskogee County (918) 781-3622
DR. VERNON LEE JENKINS D.O.
Emergency Medicine
1011 HONOR HEIGHTS DR
MUSKOGEE, OK 74401
Muskogee County (918) 680-3662
MARIE A ENOW
Registered Nurse
1011 HONOR HEIGHTS DR
MUSKOGEE, OK 74401
Muskogee County (918) 577-4040

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Katherine Klaassen's NPI number?

The NPI number for Katherine Klaassen is 1114937034. It was assigned to this individual provider in the NPPES registry on August 9, 2006.

Where is Katherine Klaassen located?

Katherine Klaassen practices at 1011 Honor Heights Dr Department Of Veterans Affairs- Medical Center, Muskogee, OK 74401. The listed phone number is (918) 680-3699.

What is Katherine Klaassen's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Geriatric Psychiatry, with taxonomy code 2084P0805X.

When was this NPI record last updated?

The NPPES record for Katherine Klaassen was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.