Marilyn Trenfield-Joyner, FNP
NPI 1609921386 · Family Nurse Practitioner · Missoula, MT
Marilyn Trenfield-Joyner, FNP is a Family Nurse Practitioner provider in Missoula, MT (NPI 1609921386).
Provider details
- NPI number
- 1609921386
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 22750 (MT)
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
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
- 2007-01-24
- Last updated
- 2007-07-25
Frequently asked questions
- What is Marilyn Trenfield-Joyner's NPI number?
- Marilyn Trenfield-Joyner's National Provider Identifier (NPI) is 1609921386, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marilyn Trenfield-Joyner's specialty?
- Marilyn Trenfield-Joyner is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marilyn Trenfield-Joyner located?
- Marilyn Trenfield-Joyner's practice location on file with NPPES is 500 W Broadway St, Missoula, MT 59802-4008.
- What is Marilyn Trenfield-Joyner's phone number?
- The practice phone number listed in the NPPES registry for Marilyn Trenfield-Joyner is (406) 721-5600.
- Is Marilyn Trenfield-Joyner's NPI active?
- Yes — Marilyn Trenfield-Joyner's NPI (1609921386) is active in the NPPES registry as of the last update on 2007-07-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.