BASS MEDICAL GROUP
NPI 1154401941
Specialist in Walnut Creek, CA

Q: What is Bass Medical Group's NPI number?

The NPI number for Bass Medical Group is 1154401941. It was assigned to this organization in the NPPES registry on October 16, 2006. The provider was formerly known as Bay Area Surgical Specialists Inc A Medical Corporation.

Q: What is Bass Medical Group's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Active since October 16, 2006

2637 SHADELANDS DR, WALNUT CREEK, CA 94598(925) 932-6330(925) 932-0139 Get Directions Write a Review

NPPES record last updated: April 17, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 23, 2022, Jun 13, 2019, Mar 7, 2019 and 2 more (5 updates tracked since 2017).

On this page

About Bass Medical Group NPPES

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

BASS MEDICAL GROUP (NPI 1154401941), doing business as Bay Area Surgical Specialists Inc A Medical Corporation, is a healthcare organization registered as a specialist in Walnut Creek, California and active in the NPI registry since October 2006. The organization lists Rajiv Nagesetty, Authorized Official, as its authorized official.

NPPES Registry Identity

NPI1154401941

Entity TypeOrganization

Primary Taxonomy174400000X

Legal Business NameBASS MEDICAL GROUP

Location Address2637 SHADELANDS DRWalnut Creek, CA 94598-2512

Mailing Address2637 Shadelands DrWalnut Creek, CA 94598-2512

Phone(925) 932-6330

Fax(925) 932-0139

Organization SubpartNo

Authorized OfficialRajiv NagesettyAuthorized Official · (925) 932-6330

Enumeration DateOctober 16, 2006

Last NPPES UpdateApril 17, 20255 updates tracked since enumeration

NPPES CertifiedApril 17, 2025

✔ NPI 1154401941 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

License✔ Licensed in CA · A78168

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

2637 SHADELANDS DR, Walnut Creek, CA 94598

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Other Names 1

Former Legal Business NameBay Area Surgical Specialists Inc A Medical Corporation

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include WellSense Health Plan.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Bass Medical Group is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

345

Medicare enrollment records show 345 clinicians reassign Medicare billing to Bass Medical Group, which bills Medicare for the services they deliver. Of these, 43 practice at this address and 144 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 40

Nurse Practitioner53

Otolaryngology43

Orthopedic Surgery20

Family Practice18

General Surgery17

Internal Medicine17

Vascular Surgery17

Neurology16

32 other specialties144

Nearest to this location (20)

See all 345

Anthony Bernens, MD

Internal Medicine

NPI 1215983440

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 952-5545

✔ PECOS✔ Accepts MedicareSame address

Jennifer Chan, M.D.

Thoracic Surgery

NPI 1265634687

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 932-6330

✔ PECOS✔ Accepts MedicareSame address

Heidi Chang, MD

Obstetrics/Gynecology

NPI 1649681982

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 393-0033

✔ PECOS✔ Accepts MedicareSame address

Kaling Cheung, M.D.

Pulmonary Disease

NPI 1881643831

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 944-0166

✔ PECOS✔ Accepts MedicareSame address

Brian Chin, MD

General Surgery

NPI 1750347100

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 932-6330

✔ PECOS✔ Accepts MedicareSame address

Michael Deboisblanc, MD

General Surgery

NPI 1467554337

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 932-6330

✔ PECOSSame address

Jennifer Dion-Gokan, FNP

Nurse Practitioner

NPI 1831634708

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 430-5335

✔ PECOSSame address

Eman Elmi, DPM

Podiatry

NPI 1073930343

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 464-1982

✔ PECOS✔ Accepts MedicareSame address

Shayan Essapoor

Podiatry

NPI 1083103725

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 464-1982

✔ PECOS✔ Accepts MedicareSame address

Karen Fong, MD

Otolaryngology

NPI 1548275068

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 300-4680

✔ PECOS✔ Accepts MedicareSame address

Tarannum Guller, MD

Internal Medicine

NPI 1972532083

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 932-6330

✔ PECOS✔ Accepts MedicareSame address

Ali Hamraz, MD

Endocrinology

NPI 1083901961

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 951-0710

✔ PECOS✔ Accepts MedicareSame address

Brian Hopkins, MD

Urology

NPI 1891793980

2637 SHADELANDS DR STE C
Walnut Creek, CA 94598

(925) 378-4517

✔ PECOS✔ Accepts MedicareSame address

Corinne Jansen, MD

Obstetrics/Gynecology

NPI 1679065817

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 393-0033

✔ PECOS✔ Accepts MedicareSame address

Brian Keyashian, M.D.

Vascular Surgery

NPI 1962776245

2637 SHADELANDS DR STE A
Walnut Creek, CA 94598

(925) 932-6330

✔ PECOS✔ Accepts MedicareSame address

Jee-Hong Kim, M.D

Otolaryngology

NPI 1629423140

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 300-4680

✔ PECOS✔ Accepts MedicareSame address

Paul Kim, M.D.

Family Practice

NPI 1609831163

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 288-2828

✔ PECOSSame address

Dimitry Lerner, M.D.

Gynecological Oncology

NPI 1992965354

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 393-0033

✔ PECOS✔ Accepts MedicareSame address

Brandon Mccutcheon, MD

Neurosurgery

NPI 1093195380

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 430-5335

✔ PECOSSame address

Cynthia Mullen, M.D.

Gastroenterology

NPI 1013123140

2637 SHADELANDS DR
Walnut Creek, CA 94598

(925) 322-2372

✔ PECOS✔ Accepts MedicareSame address

See all 345 clinicians

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 Bass Medical Group's NPI number?

The NPI number for Bass Medical Group is 1154401941. It was assigned to this organization in the NPPES registry on October 16, 2006. The provider was formerly known as Bay Area Surgical Specialists Inc A Medical Corporation.

Where is Bass Medical Group located?

Bass Medical Group is located at 2637 Shadelands Dr, Walnut Creek, CA 94598. The listed phone number is (925) 932-6330.

What is Bass Medical Group's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Bass Medical Group enrolled in Medicare?

Yes. Bass Medical Group is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Bass Medical Group?

According to the CMS Revalidation Reassignment List (October 2026 release), 345 clinicians in 40 Medicare specialties reassign their Medicare billing to Bass Medical Group. 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. The largest specialties are Nurse Practitioner (53), Otolaryngology (43) and Orthopedic Surgery (20). Of these, 43 practice at this address and 144 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Bass Medical Group accept?

Health plans from WellSense Health Plan list Bass Medical Group as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Bass Medical Group was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 months 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.