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LESLIE A. SQUIRES, MD., INC.
NPI 1619150513
Internal Medicine in San Francisco, CA

Active since December 13, 2007
45 CASTRO ST, STE 338, SAN FRANCISCO, CA 94114(415) 621-6886 Get Directions Write a Review

NPPES record last updated: April 16, 2008. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Leslie A. Squires, Md., Inc. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

LESLIE A. SQUIRES, MD., INC. (NPI 1619150513) is a healthcare organization registered as an internal medicine in San Francisco, California and active in the NPI registry since December 2007. The organization lists Leslie Allen Squires, President, as its authorized official.

NPPES Registry Identity

NPI1619150513
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameLESLIE A. SQUIRES, MD., INC.
Location Address45 CASTRO ST, STE 338San Francisco, CA 94114-1010
Mailing Address45 Castro St, Ste 338San Francisco, CA 94114-1010 · (415) 621-6886
Phone(415) 621-6886
Organization SubpartNo
Authorized OfficialLeslie Allen SquiresPresident · (415) 621-6886
Enumeration DateDecember 13, 2007
Last NPPES UpdateApril 16, 2008
✔ NPI 1619150513 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
45 CASTRO ST, San Francisco, CA 94114
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Other Identifiers 4

OtherZZZ06073ZCA · Medicare Group
Other1598837791CA · Npi
OtherA35988CA · Upin
Medicare PIN00C354450CA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Leslie A. Squires, Md., Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Leslie A. Squires, MD., Inc., which bills Medicare for the services this clinician delivers.

Clinician (1)

Leslie Squires, MD
Internal Medicine
NPI 1598837791
45 CASTRO ST STE 338
San Francisco, CA 94114
(415) 621-6886
✔ PECOSSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Leslie A. Squires, MD., Inc.'s NPI number?

The NPI number for Leslie A. Squires, MD., Inc. is 1619150513. It was assigned to this organization in the NPPES registry on December 13, 2007.

Where is Leslie A. Squires, MD., Inc. located?

Leslie A. Squires, MD., Inc. is located at 45 Castro St Ste 338, San Francisco, CA 94114. The listed phone number is (415) 621-6886.

What is Leslie A. Squires, MD., Inc.'s specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Leslie A. Squires, MD., Inc. enrolled in Medicare?

Yes. Leslie A. Squires, MD., Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Leslie A. Squires, MD., Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Leslie A. Squires, MD., Inc.. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Leslie A. Squires, MD., Inc. was last updated on April 16, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.