Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Midpeninsula Surgical Associates Medical Group

Surgical Oncology Physician in Mountain View, CA · enumerated 2006 · authorized official Saul Eisenstat, President.

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

National Provider Identifier

1164484150

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Registry record

Entity type Organization (Type 2)

Legal business name Midpeninsula Surgical Associates Medical Group

Practice address 2204 Grant Rd, Ste 203, Mountain View, CA, 94040

Phone (650) 964-0600

Fax (650) 964-0991

Enumeration date Apr 5, 2006

Last updated in NPPES Oct 10, 2011

Taxonomy & classification

208600000X Surgery Physician Allopathic & Osteopathic Physicians Secondary

2086X0206X Surgical Oncology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Saul Eisenstat

Title President

Phone (650) 964-0600

Other identifiers

Identifier	Type	State	Issuer
ZZZ19414Z	Other	CA	PTAN
GR0048611	Medicaid	CA	-

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 the NPI number for Midpeninsula Surgical Associates Medical Group?

The NPI for Midpeninsula Surgical Associates Medical Group is 1164484150, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Midpeninsula Surgical Associates Medical Group?

NPPES lists Saul Eisenstat (President) as the authorized official for this organization.

Providers at this address

Browse all →

Andrew Lipton Gastroenterology Physician · Mountain View, CA NPI 1174594394 Saul Eisenstat Surgery Physician · Mountain View, CA NPI 1962464776 Joyce Tatelman Family Medicine Physician · Mountain View, CA NPI 1447276878 Geeta Krishnapriyan Internal Medicine Physician · Mountain View, CA NPI 1669487112 Prasanna Menon Specialist · Mountain View, CA NPI 1417061573 Kenneth Goranson Orthopaedic Surgery Physician · Mountain View, CA NPI 1770689440 Robert Mitchell Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Mountain View, CA NPI 1356431795 Leonard Doberne Endocrinology, Diabetes & Metabolism Physician · Mountain View, CA NPI 1558447847

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-10-10.