Olivia Letter
NPI 1598583197 · Certified Registered Nurse Anesthetist · Oshkosh, WI
Olivia Letter is a Certified Registered Nurse Anesthetist provider in Oshkosh, WI (NPI 1598583197).
Provider details
- NPI number
- 1598583197
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 161098 (WI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr 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
- 2024-10-01
- Last updated
- 2026-05-26
- Certified
- 2026-05-26
Frequently asked questions
- What is Olivia Letter's NPI number?
- Olivia Letter's National Provider Identifier (NPI) is 1598583197, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Olivia Letter's specialty?
- Olivia Letter is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Olivia Letter located?
- Olivia Letter's practice location on file with NPPES is 800 Algoma Blvd, Oshkosh, WI 54901-8610.
- What is Olivia Letter's phone number?
- The practice phone number listed in the NPPES registry for Olivia Letter is (920) 424-1077.
- Is Olivia Letter's NPI active?
- Yes — Olivia Letter's NPI (1598583197) is active in the NPPES registry as of the last update on 2026-05-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.