Mark Johnston, FNP-C
NPI 1144623455 · Family Nurse Practitioner · Inverness, FL
Mark Johnston, FNP-C is a Family Nurse Practitioner provider in Inverness, FL (NPI 1144623455).
Provider details
- NPI number
- 1144623455
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Male
- Sole proprietor
- No
- License
- RN9462949 (FL)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Nursing Service Providers
Physician Assistants & Advanced Practice Nursing Providers
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
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 12412 Judson RdLive Oak, TX 78233-3255Phone: (210) 757-5300Fax: (210) 757-5186
Registry dates
- Enumerated
- 2014-09-30
- Last updated
- 2019-05-25
Frequently asked questions
- What is Mark Johnston's NPI number?
- Mark Johnston's National Provider Identifier (NPI) is 1144623455, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Johnston's specialty?
- Mark Johnston is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mark Johnston located?
- Mark Johnston's practice location on file with NPPES is 502 W Highland Blvd, Inverness, FL 34452-4720.
- What is Mark Johnston's phone number?
- The practice phone number listed in the NPPES registry for Mark Johnston is (352) 726-1551.
- Is Mark Johnston's NPI active?
- Yes — Mark Johnston's NPI (1144623455) is active in the NPPES registry as of the last update on 2019-05-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.