Katherine Klaassen, MD
NPI 1114937034 · Geriatric Psychiatry Physician · Muskogee, OK
Katherine Klaassen, MD is a Geriatric Psychiatry Physician provider in Muskogee, OK (NPI 1114937034).
Provider details
- NPI number
- 1114937034
- Entity type
- Individual
- Primary specialty
- Geriatric Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 18532 (OK)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-09
- Last updated
- 2025-09-11
Frequently asked questions
- What is Katherine Klaassen's NPI number?
- Katherine Klaassen's National Provider Identifier (NPI) is 1114937034, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Klaassen's specialty?
- Katherine Klaassen is listed in the NPPES registry with a primary specialty of Geriatric Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Klaassen located?
- Katherine Klaassen's practice location on file with NPPES is 1011 Honor Heights Dr, Muskogee, OK 74401-1318.
- What is Katherine Klaassen's phone number?
- The practice phone number listed in the NPPES registry for Katherine Klaassen is (918) 680-3699.
- Is Katherine Klaassen's NPI active?
- Yes — Katherine Klaassen's NPI (1114937034) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.