Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Firstline Diagnostic of California

General Practice Physician in San Francisco, CA · enumerated 2016 · authorized official Mordechai Pavlovsky, Partner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1689020547

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Registry record

Entity type Organization (Type 2)

Legal business name Firstline Diagnostic of California

Practice address 645 7th St, San Francisco, CA, 94103

Phone (415) 834-5364

Enumeration date May 10, 2016

Last updated in NPPES May 10, 2016

Taxonomy & classification

208D00000X General Practice Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Mordechai Pavlovsky

Title Partner

Phone (415) 834-5364

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Firstline Diagnostic of California?

Firstline Diagnostic of California is registered in NPPES as a General Practice Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-05-10.