IndividualActive
John Johnston, M.D.
NPI 1346283421 · Family Medicine Physician · Walterboro, SC
John Johnston, M.D. is a Family Medicine Physician provider in Walterboro, SC (NPI 1346283421).
Provider details
- NPI number
- 1346283421
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 6359 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
107 Church St
Walterboro, SC 29488-2901
Phone: (843) 549-1558
Fax: (843) 549-1454
Approximate (ZIP-level) locationGet directions
Mailing address
107 Church St
Walterboro, SC 29488-2901
Registry dates
- Enumerated
- 2006-06-14
- Last updated
- 2010-11-09
Frequently asked questions
- What is John Johnston's NPI number?
- John Johnston's National Provider Identifier (NPI) is 1346283421, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Johnston's specialty?
- John Johnston is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Johnston located?
- John Johnston's practice location on file with NPPES is 107 Church St, Walterboro, SC 29488-2901.
- What is John Johnston's phone number?
- The practice phone number listed in the NPPES registry for John Johnston is (843) 549-1558.
- Is John Johnston's NPI active?
- Yes — John Johnston's NPI (1346283421) is active in the NPPES registry as of the last update on 2010-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.