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STEPHEN S CHEN MD INC
NPI 1558855437
Orthopaedic Surgery - Sports Medicine in Walnut Creek, CA

Active since June 14, 2018
1777 BOTELHO DR STE 110, WALNUT CREEK, CA 94596(925) 934-3536(925) 934-0672 Get Directions Write a Review

NPPES record last updated: January 8, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jan 8, 2020, Jun 16, 2018 (2 updates tracked since 2018).

About Stephen S Chen Md Inc NPPES

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

STEPHEN S CHEN MD INC (NPI 1558855437) is a healthcare organization registered as a sports medicine in Walnut Creek, California and active in the NPI registry since June 2018. The organization lists Margaret A Raskowsky, Manager, as its authorized official.

NPPES Registry Identity

NPI1558855437
Entity TypeOrganization
Primary Taxonomy207XX0005X
Legal Business NameSTEPHEN S CHEN MD INC
Location Address1777 BOTELHO DR STE 110Walnut Creek, CA 94596-5083
Mailing Address6114 La Salle Ave # 320Oakland, CA 94611-2802 · (415) 491-1210 · Fax (415) 491-4647
Phone(925) 934-3536
Fax(925) 934-0672
Organization SubpartNo
Authorized OfficialMargaret A RaskowskyManager · (415) 491-1210
Enumeration DateJune 14, 2018
Last NPPES UpdateJanuary 8, 20202 updates tracked since enumeration
✔ NPI 1558855437 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic Surgery · Sports MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207XX0005X
License✔ Licensed in CA · A107350
Definition
An orthopaedic surgeon trained in sports medicine provides appropriate care for all structures of the musculoskeletal system directly affected by participation in sporting activity. This specialist is proficient in areas including conditioning, training and fitness, athletic performance and the impact of dietary supplements, pharmaceuticals, and nutrition on performance and health, coordination of care within the team setting utilizing other health care professionals, field evaluation and management, soft tissue biomechanics and injury healing and repair. Knowledge and understanding of the principles and techniques of rehabilitation, athletic equipment and orthotic devices enables the specialist to prevent and manage athletic injuries.
1777 BOTELHO DR STE 110, Walnut Creek, CA 94596
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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)

Stephen S Chen Md Inc 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 Stephen S Chen MD Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Stephen Chen, M.D.
Sports Medicine
NPI 1730336397
1777 BOTELHO DR STE 110
Walnut Creek, CA 94596
(925) 934-3536
✔ PECOS✔ Accepts MedicareSame 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 Stephen S Chen MD Inc's NPI number?

The NPI number for Stephen S Chen MD Inc is 1558855437. It was assigned to this organization in the NPPES registry on June 14, 2018.

Where is Stephen S Chen MD Inc located?

Stephen S Chen MD Inc is located at 1777 Botelho Dr Ste 110, Walnut Creek, CA 94596. The listed phone number is (925) 934-3536.

What is Stephen S Chen MD Inc's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Sports Medicine, with taxonomy code 207XX0005X.

Is Stephen S Chen MD Inc enrolled in Medicare?

Yes. Stephen S Chen MD Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Stephen S Chen MD Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Sports Medicine) reassigns their Medicare billing to Stephen S Chen MD Inc. 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 Stephen S Chen MD Inc was last updated on January 8, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.