Timothy S. Johnston, M.D. PC
NPI 1407306665 · Family Medicine Physician · Merced, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy S. Johnston, M.D. PC is a Family Medicine Physician organization in Merced, CA (NPI 1407306665).
Provider details
- NPI number
- 1407306665
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Timothy Johnston, Owner/Operator(209) 756-2275
- License
- G58698 (CA)
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
9 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)
- 3170 Collins Dr Ste BMerced, CA 95348-3164Phone: (209) 349-8459Fax: (209) 354-4607
Registry dates
- Enumerated
- 2016-10-11
- Last updated
- 2025-12-09
- Certified
- 2025-12-09
Frequently asked questions
- What is Timothy S. Johnston, M.D. PC's NPI number?
- Timothy S. Johnston, M.D. PC's National Provider Identifier (NPI) is 1407306665, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Timothy S. Johnston, M.D. PC?
- Timothy S. Johnston, M.D. PC is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy S. Johnston, M.D. PC located?
- Timothy S. Johnston, M.D. PC's practice location on file with NPPES is 3349 G St, Merced, CA 95340-0993.
- What is Timothy S. Johnston, M.D. PC's phone number?
- The practice phone number listed in the NPPES registry for Timothy S. Johnston, M.D. PC is (209) 349-8549.
- Does Timothy S. Johnston, M.D. PC accept Medicare?
- Timothy S. Johnston, M.D. PC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Timothy S. Johnston, M.D. PC?
- The authorized official listed on Timothy S. Johnston, M.D. PC's NPPES record is Timothy Johnston, Owner/Operator. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Timothy S. Johnston, M.D. PC's NPI active?
- Yes — Timothy S. Johnston, M.D. PC's NPI (1407306665) is active in the NPPES registry as of the last update on 2025-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.