Harrison Lauer, RD
Harrison Lauer, RD is a Registered Dietitian in Napa, CA, registered under NPI 1003310327. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Napa, based on OpenStreetMap data collected Sep 17, 2026. Parking is available about 1,015 ft away. The nearest transit stop is 0.20 mi away. A pharmacy sits 1,027 ft from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.48 mi away.
Getting here and what is nearby
Parking 443 ft ~2 min
Parking 747 ft ~3 min
Parking 1,015 ft ~4 min
Pharmacy CVS Pharmacy 1,027 ft ~4 min
Transit 0.20 mi ~4 min
Coffee Starbucks 0.23 mi ~5 min
Restaurant Trancas Steakhouse 0.24 mi ~5 min
999 Trancas Street, Napa 94558
Su-Th 11:00-15:30, 16:00-21:30; Fr-Sa 11:00-15:30, 16:00-22:00
Restaurant Jamba 0.26 mi ~6 min
Convenience ExtraMile 0.29 mi ~6 min
Grocery Nob Hill 0.29 mi ~6 min
Gas station Chevron 0.31 mi ~7 min
Coffee Golden Bagel 0.48 mi ~10 min
Restaurant McDonald's 0.49 mi ~10 min
3224 Jefferson Street, Napa 94558-3436
05:00-21:00
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 86051106 | Registered Dietitian primary |
Licences are recorded in 0 states: . Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Dietitian, Registered covers
A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation. NUCC Health Care Provider Taxonomy, code 133V00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003310327 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 21, 2018 |
| Last updated | Mar 21, 2018 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | RD |
| Practice address |
713 TRANCAS ST APT 23 Napa, CA 94558 (949) 412-7811 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 3 | 1 | 0 | 3 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 1 | 0 | 3 | 4 |
Sum = 43 · next multiple of 10 = 50 · check digit = 7 · actual last digit = 7
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.