What is Jeffrey Larsen's NPI number?

Jeffrey Larsen's National Provider Identifier (NPI) is 1598830655, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Jeffrey Larsen's specialty?

Jeffrey Larsen is listed in the NPPES registry with a primary specialty of Other Technician (Technologists, Technicians & Other Technical Service Providers).

Where is Jeffrey Larsen located?

Jeffrey Larsen's practice location on file with NPPES is 599 Tomales Rd, Petaluma, CA 94952-5002.

What is Jeffrey Larsen's phone number?

The practice phone number listed in the NPPES registry for Jeffrey Larsen is (707) 765-7200.

Is Jeffrey Larsen's NPI active?

Yes — Jeffrey Larsen's NPI (1598830655) is active in the NPPES registry as of the last update on 2007-07-08.

IndividualActive

Jeffrey Larsen, HS3

NPI 1598830655 · Other Technician · Petaluma, CA

Jeffrey Larsen, HS3 is a Other Technician provider in Petaluma, CA (NPI 1598830655).

Provider details

NPI number: 1598830655
Entity type: Individual
Primary specialty: Other TechnicianTechnologists, Technicians & Other Technical Service Providers
Credential: HS3
Sex: Male
Sole proprietor: No

Specialties & taxonomies

Other TechnicianPrimary247200000X
Technologists, Technicians & Other Technical Service Providers

Profile Score

Detailed profile(84/100 index)

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
83% 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

599 Tomales Rd

Petaluma, CA 94952-5002

Phone: (707) 765-7200

Street-level locationGet directions

More CA providers

Mailing address

2 Alta Vista Ct Apt E

Novato, CA 94949-6531

Enumerated: 2006-11-22
Last updated: 2007-07-08

Frequently asked questions

What is Jeffrey Larsen's NPI number?: Jeffrey Larsen's National Provider Identifier (NPI) is 1598830655, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Jeffrey Larsen's specialty?: Jeffrey Larsen is listed in the NPPES registry with a primary specialty of Other Technician (Technologists, Technicians & Other Technical Service Providers).
Where is Jeffrey Larsen located?: Jeffrey Larsen's practice location on file with NPPES is 599 Tomales Rd, Petaluma, CA 94952-5002.
What is Jeffrey Larsen's phone number?: The practice phone number listed in the NPPES registry for Jeffrey Larsen is (707) 765-7200.
Is Jeffrey Larsen's NPI active?: Yes — Jeffrey Larsen's NPI (1598830655) is active in the NPPES registry as of the last update on 2007-07-08.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.