NORCAL ENDOCRINOLOGY & INTERNAL MEDICINE
NPI 1770763419
Internal Medicine in San Ramon, CA

Q: What is Yshay Shlesinger, M.D., A Professional Corporation's specialty?

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

Active since November 09, 2007

111 DEERWOOD RD, SUITE 180, SAN RAMON, CA 94583(925) 552-5284 Get Directions Write a Review

NPPES record last updated: September 13, 2016. Verified against the NPPES registry weekly; last sync: November 08, 2026.

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About Norcal Endocrinology & Internal Medicine NPPES

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

NORCAL ENDOCRINOLOGY & INTERNAL MEDICINE (NPI 1770763419) is a healthcare organization registered as an internal medicine in San Ramon, California and active in the NPI registry since November 2007. The organization lists Yshay Shlesinger, Ceo, as its authorized official.

NPPES Registry Identity

NPI1770763419

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameYSHAY SHLESINGER, M.D., A PROFESSIONAL CORPORATION

Location Address111 DEERWOOD RD, SUITE 180San Ramon, CA 94583

Mailing Address111 Deerwood Rd, Suite 180San Ramon, CA 94583-4409 · (925) 552-5284

Phone(925) 552-5284

Organization SubpartNo

Authorized OfficialYshay ShlesingerCeo · (925) 552-5284

Enumeration DateNovember 9, 2007

Last NPPES UpdateSeptember 13, 2016

✔ NPI 1770763419 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CA · A65724

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.

Also ListedInternal Medicine · Endocrinology, Diabetes & MetabolismTaxonomy 207RE0101X · License A65724 (CA)

111 DEERWOOD RD, San Ramon, CA 94583

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Other Names 1

Doing Business AsNorcal Endocrinology & Internal Medicine

Other Identifiers 1

OtherZZZ06877ZCA · Ptn

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 MULTIPLE SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Norcal Endocrinology & Internal Medicine is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by February 28, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date

StateCaliforniaEnrollment IDO20080328000728Non-DME Part B · Clinic/Group PracticeDue dateFebruary 28, 2027

Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Norcal Endocrinology & Internal Medicine, which bills Medicare for the services this clinician delivers.

Clinician (1)

Yshay Shlesinger, M.D.

Endocrinology

NPI 1881799922

111 DEERWOOD RD SUITE 180
San Ramon, CA 94583

(925) 552-5284

✔ PECOS✔ Accepts Medicare0.1 mi

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 Yshay Shlesinger, M.D., A Professional Corporation's NPI number?

The NPI number for Yshay Shlesinger, M.D., A Professional Corporation is 1770763419. It was assigned to this organization in the NPPES registry on November 9, 2007. The provider is doing business as Norcal Endocrinology & Internal Medicine.

Where is Yshay Shlesinger, M.D., A Professional Corporation located?

Yshay Shlesinger, M.D., A Professional Corporation is located at 111 Deerwood Rd Suite 180, San Ramon, CA 94583. The listed phone number is (925) 552-5284.

What is Yshay Shlesinger, M.D., A Professional Corporation's specialty?

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

Is Yshay Shlesinger, M.D., A Professional Corporation enrolled in Medicare?

Yes. Yshay Shlesinger, M.D., A Professional Corporation is registered in the Medicare PECOS enrollment system.

When is Yshay Shlesinger, M.D., A Professional Corporation's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by February 28, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Yshay Shlesinger, M.D., A Professional Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Endocrinology) reassigns their Medicare billing to Yshay Shlesinger, M.D., A Professional Corporation. 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 Yshay Shlesinger, M.D., A Professional Corporation was last updated on September 13, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.