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Timothy Matthiessen, RD
NPI 1972276475 · Registered Dietitian · Walnut Creek, CA
Timothy Matthiessen, RD is a Registered Dietitian provider in Walnut Creek, CA (NPI 1972276475).
Provider details
- NPI number
- 1972276475
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- RD
- Sex
- Male
- Sole proprietor
- No
- License
- 1059639 (VA)
Specialties & taxonomies
Dietary & Nutritional Service Providers
Profile Score
Established profile(62/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 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
1425 S Main St
Walnut Creek, CA 94596-5318
Phone: (925) 295-4422
Street-level locationGet directions
Mailing address
2266 Lisa Ln
Pleasant Hill, CA 94523-3951
Registry dates
- Enumerated
- 2021-07-29
- Last updated
- 2021-11-23
- Certified
- 2021-11-23
Frequently asked questions
- What is Timothy Matthiessen's NPI number?
- Timothy Matthiessen's National Provider Identifier (NPI) is 1972276475, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Matthiessen's specialty?
- Timothy Matthiessen is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Timothy Matthiessen located?
- Timothy Matthiessen's practice location on file with NPPES is 1425 S Main St, Walnut Creek, CA 94596-5318.
- What is Timothy Matthiessen's phone number?
- The practice phone number listed in the NPPES registry for Timothy Matthiessen is (925) 295-4422.
- Is Timothy Matthiessen's NPI active?
- Yes — Timothy Matthiessen's NPI (1972276475) is active in the NPPES registry as of the last update on 2021-11-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.