IndividualActive
Mark Johnston, M.D.
NPI 1659404226 · Psychiatry Physician · Salt Lake City, UT
Mark Johnston, M.D. is a Psychiatry Physician provider in Salt Lake City, UT (NPI 1659404226).
Provider details
- NPI number
- 1659404226
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 185388-1205 (UT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(89/100 index)
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
419 Wakara Way
#200
Salt Lake City, UT 84108-1257
Phone: (801) 583-1781
Street-level locationGet directions
Mailing address
555 E 4500 S
Salt Lake City, UT 84107-4533
Registry dates
- Enumerated
- 2007-03-13
- Last updated
- 2009-03-04
Frequently asked questions
- What is Mark Johnston's NPI number?
- Mark Johnston's National Provider Identifier (NPI) is 1659404226, 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 Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Johnston located?
- Mark Johnston's practice location on file with NPPES is 419 Wakara Way, Salt Lake City, UT 84108-1257.
- What is Mark Johnston's phone number?
- The practice phone number listed in the NPPES registry for Mark Johnston is (801) 583-1781.
- Is Mark Johnston's NPI active?
- Yes — Mark Johnston's NPI (1659404226) is active in the NPPES registry as of the last update on 2009-03-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.