1. Home
  2. Directory
  3. California
  4. Antioch
  5. Orthopaedic Surgery
  6. NPI Profile

BASS MEDICAL GROUP
NPI 1396124574
Orthopaedic Surgery in Antioch, CA

Active since May 21, 2015
2350 COUNTRY HILLS DR, SUITE B, ANTIOCH, CA 94509(925) 528-2663(925) 757-2160 Get Directions Write a Review

NPPES record last updated: October 18, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 18, 2023, Mar 9, 2018 (2 updates tracked since 2018).

About Bass Medical Group NPPES

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

BASS MEDICAL GROUP (NPI 1396124574) is a healthcare organization registered as an orthopaedic surgery in Antioch, California and active in the NPI registry since May 2015. The organization lists Inez Wondeh, Coo, as its authorized official.

NPPES Registry Identity

NPI1396124574
Entity TypeOrganization
Primary Taxonomy207X00000X
Legal Business NameBASS MEDICAL GROUP
Location Address2350 COUNTRY HILLS DR, SUITE BAntioch, CA 94509-7436
Mailing Address2637 Shadelands DrWalnut Creek, CA 94598-2512 · (925) 948-8143 · Fax (925) 215-4540
Phone(925) 528-2663
Fax(925) 757-2160
Organization SubpartNo
Authorized OfficialInez WondehCoo · (925) 378-4512
Enumeration DateMay 21, 2015
Last NPPES UpdateOctober 18, 20232 updates tracked since enumeration
NPPES CertifiedOctober 18, 2023
✔ NPI 1396124574 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
Definition
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
Also ListedOrthopaedic Surgery · Sports MedicineTaxonomy 207XX0005X
2350 COUNTRY HILLS DR, Antioch, CA 94509
Open in Google Maps ↗

Other Identifiers 1

Other7360010003Nsc Medicare

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

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, 3 practice at this address and 11 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
Jonathan Chin, MD
Urology
NPI 1841216892
2350 COUNTRY HILLS DR STE A
Antioch, CA 94509
(925) 779-9097
✔ PECOS✔ Accepts MedicareSame address
Hamid Rassai
General Surgery
NPI 1013013218
2350 COUNTRY HILLS DR STE A
Antioch, CA 94509
(925) 757-0800
✔ PECOS✔ Accepts MedicareSame address
Denise Romero, M.D.
Orthopedic Surgery
NPI 1194922542
2350 COUNTRY HILLS DR STE A
Antioch, CA 94509
(925) 757-0800
✔ PECOS✔ Accepts MedicareSame address
Hamidreza Khonsari, M.D.
Family Practice
NPI 1306874714
3903 LONE TREE WAY SUITE 104
Antioch, CA 94509
(925) 755-1255
✔ PECOS✔ Accepts Medicare0.3 mi
Monica Monari, FNP
Nurse Practitioner
NPI 1851141907
3505 LONE TREE WAY STE 1
Antioch, CA 94509
(000) 000-0000
✔ PECOS1.8 mi
Tahtyana Jones
Nurse Practitioner
NPI 1831037977
6600 LONE TREE WAY
Brentwood, CA 94513
(925) 471-4223
✔ PECOS2.9 mi
Shreya Khatri, MD
Family Practice
NPI 1841753605
6600 LONE TREE WAY
Brentwood, CA 94513
(925) 471-4223
✔ PECOS✔ Accepts Medicare2.9 mi
Brian Reyes, M.D.
Internal Medicine
NPI 1972574739
6600 LONE TREE WAY STE B
Brentwood, CA 94513
(925) 276-9908
✔ PECOS✔ Accepts Medicare2.9 mi
Randall Wenokur, MD
Otolaryngology
NPI 1669562427
6600 LONE TREE WAY
Brentwood, CA 94513
(925) 685-7400
✔ PECOS✔ Accepts Medicare2.9 mi
Bassam Said, M.D.
Otolaryngology
NPI 1831118652
1240 CENTRAL BLVD SUITE A2
Brentwood, CA 94513
(925) 753-1986
✔ PECOS✔ Accepts Medicare5.1 mi
Mary Cardoza, M.D.
General Surgery
NPI 1710936067
2260 GLADSTONE DR STE 5
Pittsburg, CA 94565
(925) 427-0203
✔ PECOS✔ Accepts Medicare5.2 mi
Patrick Ryan, MD
Diagnostic Radiology
NPI 1760638118
2125 OAK GROVE RD STE 200
Walnut Creek, CA 94598
(310) 619-5106
✔ PECOS13 mi
Anthony Bernens, MD
Internal Medicine
NPI 1215983440
2637 SHADELANDS DR
Walnut Creek, CA 94598
(925) 952-5545
✔ PECOS✔ Accepts Medicare13 mi
Jennifer Chan, M.D.
Thoracic Surgery
NPI 1265634687
2637 SHADELANDS DR
Walnut Creek, CA 94598
(925) 932-6330
✔ PECOS✔ Accepts Medicare13 mi
Heidi Chang, MD
Obstetrics/Gynecology
NPI 1649681982
2637 SHADELANDS DR
Walnut Creek, CA 94598
(925) 393-0033
✔ PECOS✔ Accepts Medicare13 mi
Kaling Cheung, M.D.
Pulmonary Disease
NPI 1881643831
2637 SHADELANDS DR
Walnut Creek, CA 94598
(925) 944-0166
✔ PECOS✔ Accepts Medicare13 mi
Brian Chin, MD
General Surgery
NPI 1750347100
2637 SHADELANDS DR
Walnut Creek, CA 94598
(925) 932-6330
✔ PECOS✔ Accepts Medicare13 mi
Jennifer Dion-Gokan, FNP
Nurse Practitioner
NPI 1831634708
2637 SHADELANDS DR
Walnut Creek, CA 94598
(925) 430-5335
✔ PECOS13 mi
Eman Elmi, DPM
Podiatry
NPI 1073930343
2637 SHADELANDS DR
Walnut Creek, CA 94598
(925) 464-1982
✔ PECOS✔ Accepts Medicare13 mi
Karen Fong, MD
Otolaryngology
NPI 1548275068
2637 SHADELANDS DR
Walnut Creek, CA 94598
(925) 300-4680
✔ PECOS✔ Accepts Medicare13 mi
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 1396124574. It was assigned to this organization in the NPPES registry on May 21, 2015.

Where is Bass Medical Group located?

Bass Medical Group is located at 2350 Country Hills Dr Suite B, Antioch, CA 94509. The listed phone number is (925) 528-2663.

What is Bass Medical Group's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

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, 3 practice at this address and 11 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Bass Medical Group was last updated on October 18, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.