Samantha Johnston, MD
NPI 1669495370 · Pediatric Infectious Diseases Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Samantha Johnston, MD is a Pediatric Infectious Diseases Physician provider in Palo Alto, CA (NPI 1669495370).
Provider details
- NPI number
- 1669495370
- Entity type
- Individual
- Primary specialty
- Pediatric Infectious Diseases PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A86357 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
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
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)
- 747 52nd StOakland, CA 94609-1809Phone: (510) 428-3000
Registry dates
- Enumerated
- 2006-07-25
- Last updated
- 2024-04-12
- Certified
- 2024-04-12
Frequently asked questions
- What is Samantha Johnston's NPI number?
- Samantha Johnston's National Provider Identifier (NPI) is 1669495370, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Samantha Johnston's specialty?
- Samantha Johnston is listed in the NPPES registry with a primary specialty of Pediatric Infectious Diseases Physician (Allopathic & Osteopathic Physicians).
- Where is Samantha Johnston located?
- Samantha Johnston's practice location on file with NPPES is 725 Welch Rd, Palo Alto, CA 94304-1601.
- What is Samantha Johnston's phone number?
- The practice phone number listed in the NPPES registry for Samantha Johnston is (650) 497-8000.
- Does Samantha Johnston accept Medicare?
- Samantha Johnston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Samantha Johnston's NPI active?
- Yes — Samantha Johnston's NPI (1669495370) is active in the NPPES registry as of the last update on 2024-04-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.