Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Pacific Hospitalist Associates A Medical Corporation

Hospitalist Physician in Irvine, CA · enumerated 2010 · authorized official Weston Chandler, President.

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

National Provider Identifier

1356669790

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Registry record

Entity type Organization (Type 2)

Legal business name Pacific Hospitalist Associates A Medical Corporation

Practice address 16200 Sand Canyon Ave, Irvine, CA, 92618

Phone (949) 873-6181

Fax (949) 873-0418

Enumeration date May 10, 2010

Last updated in NPPES Dec 13, 2024

Taxonomy & classification

207QH0002X Hospice and Palliative Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Secondary

207RH0002X Hospice and Palliative Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License FNP28511 (CA) Primary

Authorized official

Name Weston Chandler

Title President

Phone (949) 873-6181

Other identifiers

Identifier	Type	State	Issuer
CK2215	Other	CA	MEDICARE RAILROAD

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 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.

What type of organization is Pacific Hospitalist Associates A Medical Corporation?

Pacific Hospitalist Associates A Medical Corporation is registered in NPPES as a Hospitalist Physician (its primary provider taxonomy).

Providers at this address

Browse all →

Scott Derkum Hospitalist Physician · Irvine, CA NPI 1588660849 Christopher Smith Physician Assistant · Irvine, CA NPI 1285622803 Joseph Gilboy Physician Assistant · Irvine, CA NPI 1851374466 Albert Jin Emergency Medical Services (Emergency Medicine) Physician · Irvine, CA NPI 1790738292 Thomas Ryu Emergency Medical Services (Emergency Medicine) Physician · Irvine, CA NPI 1164477410 Ann Ullrich Emergency Medical Services (Emergency Medicine) Physician · Irvine, CA NPI 1891741609 Steven Lin Emergency Medical Services (Emergency Medicine) Physician · Irvine, CA NPI 1821044082 G. Michael Chun Specialist · Irvine, CA NPI 1578590899

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-13.