Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

BENJAMIN YIM MD APC
NPI 1922818111
Neurological Surgery in Walnut Creek, CA

Active since January 09, 2025
120 LA CASA VIA STE 102, WALNUT CREEK, CA 94598(925) 867-1900(925) 867-1901 Get Directions Write a Review

NPPES record last updated: September 14, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 14, 2026, Jan 9, 2025 (2 updates tracked since 2025).

About Benjamin Yim Md Apc NPPES

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

BENJAMIN YIM MD APC (NPI 1922818111) is a healthcare organization registered as a neurological surgery in Walnut Creek, California and active in the NPI registry since January 2025. The organization lists Mona Saad, Billing Manager, as its authorized official.

NPPES Registry Identity

NPI1922818111
Entity TypeOrganization
Primary Taxonomy207T00000X
Legal Business NameBENJAMIN YIM MD APC
Location Address120 LA CASA VIA STE 102Walnut Creek, CA 94598-3092
Mailing Address120 La Casa Via Ste 102Walnut Creek, CA 94598-3092 · (925) 867-1900 · Fax (925) 867-1901
Fax(925) 867-1901
Organization SubpartNo
Authorized OfficialMona SaadBilling Manager · (818) 336-6262
Enumeration DateJanuary 9, 2025
Last NPPES UpdateSeptember 14, 20262 updates tracked since enumeration
NPPES CertifiedSeptember 14, 2026
✔ NPI 1922818111 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
Definition
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
120 LA CASA VIA STE 102, Walnut Creek, CA 94598

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)

Benjamin Yim Md Apc 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 Benjamin Yim MD Apc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Neurosurgery
NPI 1598176604
120 LA CASA VIA STE 102
Walnut Creek, CA 94598
(925) 867-1900
✔ 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 Benjamin Yim MD Apc's NPI number?

The NPI number for Benjamin Yim MD Apc is 1922818111. It was assigned to this organization in the NPPES registry on January 9, 2025.

Where is Benjamin Yim MD Apc located?

Benjamin Yim MD Apc is located at 120 La Casa Via Ste 102, Walnut Creek, CA 94598. The listed phone number is (925) 867-1900.

What is Benjamin Yim MD Apc's specialty?

The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.

Is Benjamin Yim MD Apc enrolled in Medicare?

Yes. Benjamin Yim MD Apc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Benjamin Yim MD Apc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Neurosurgery) reassigns their Medicare billing to Benjamin Yim MD Apc. 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 Benjamin Yim MD Apc was last updated on September 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 45 days 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.