Ion, LLC
NPI 1003166372 · Electrodiagnostic Medicine Physician · Walnut Creek, CA
Ion, LLC is a Electrodiagnostic Medicine Physician organization in Walnut Creek, CA (NPI 1003166372).
Provider details
- NPI number
- 1003166372
- Entity type
- Organization
- Primary specialty
- Electrodiagnostic Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Jonathan Block, Owner(678) 977-6666
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
13 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
- 2012-09-14
- Last updated
- 2012-09-14
Frequently asked questions
- What is Ion, LLC's NPI number?
- Ion, LLC's National Provider Identifier (NPI) is 1003166372, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Ion, LLC?
- Ion, LLC is classified in the NPPES registry as Electrodiagnostic Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ion, LLC located?
- Ion, LLC's practice location on file with NPPES is 951 Country Lane, Walnut Creek, CA 94596-6143.
- What is Ion, LLC's phone number?
- The practice phone number listed in the NPPES registry for Ion, LLC is (678) 977-6666.
- Who is the authorized official for Ion, LLC?
- The authorized official listed on Ion, LLC's NPPES record is Jonathan Block, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Ion, LLC's NPI active?
- Yes — Ion, LLC's NPI (1003166372) is active in the NPPES registry as of the last update on 2012-09-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.