Harold Johnston, M.D.
NPI 1255305942 · Family Medicine Physician · Cook, MN
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harold Johnston, M.D. is a Family Medicine Physician provider in Cook, MN (NPI 1255305942).
Provider details
- NPI number
- 1255305942
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- 21520 (MN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
- 2006-02-17
- Last updated
- 2007-07-08
Frequently asked questions
- What is Harold Johnston's NPI number?
- Harold Johnston's National Provider Identifier (NPI) is 1255305942, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harold Johnston's specialty?
- Harold Johnston is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Harold Johnston located?
- Harold Johnston's practice location on file with NPPES is 20 5th St Se, Cook, MN 55723-9702.
- What is Harold Johnston's phone number?
- The practice phone number listed in the NPPES registry for Harold Johnston is (218) 666-5941.
- Does Harold Johnston accept Medicare?
- Harold Johnston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harold Johnston's NPI active?
- Yes — Harold Johnston's NPI (1255305942) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.