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GOLDEN STATE ORTHOPEDICS & SPINE
NPI 1427402783
Orthopaedic Surgery in Concord, CA

Active since April 22, 2016
1800 SUTTER ST, SUITE 100, CONCORD, CA 94520(925) 939-8585(925) 933-2709 Get Directions Write a Review

NPPES record last updated: June 13, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 13, 2024, Jan 26, 2022, Aug 19, 2020 and 2 more (5 updates tracked since 2016).

About Golden State Orthopedics & Spine NPPES

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

GOLDEN STATE ORTHOPEDICS & SPINE (NPI 1427402783) is a healthcare organization registered as an orthopaedic surgery in Concord, California and active in the NPI registry since April 2016. The organization lists Stephen Hammarstrom, Ceo, as its authorized official.

NPPES Registry Identity

NPI1427402783
Entity TypeOrganization
Primary Taxonomy207X00000X
Legal Business NameGOLDEN STATE ORTHOPEDICS & SPINE
Location Address1800 SUTTER ST, SUITE 100Concord, CA 94520-2563
Mailing AddressPo Box 31396Walnut Creek, CA 94598-8396 · (925) 939-8585 · Fax (925) 933-2709
Phone(925) 939-8585
Fax(925) 933-2709
Organization SubpartYes
Authorized OfficialStephen HammarstromCeo · (925) 939-8585
Enumeration DateApril 22, 2016
Last NPPES UpdateJune 13, 20245 updates tracked since enumeration
NPPES CertifiedJune 13, 2024
✔ NPI 1427402783 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ 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.
1800 SUTTER ST, Concord, CA 94520
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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)

Golden State Orthopedics & Spine is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

210

Medicare enrollment records show 210 clinicians reassign Medicare billing to Golden State Orthopedics & Spine, which bills Medicare for the services they deliver. Of these, 9 practice at this address and 74 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 14

Physical Therapist in Private Practice93
Orthopedic Surgery55
Occupational Therapist in Private Practice24
Nurse Practitioner16
Hand Surgery6
Physical Medicine and Rehabilitation5
Family Practice3
Sports Medicine2
6 other specialties6

Nearest to this location (20)

See all 210
Semon Bader, M.D.
Orthopedic Surgery
NPI 1750581278
1800 SUTTER ST STE 100
Concord, CA 94520
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
Cara Jennings
Physical Therapist in Private Practice
NPI 1023734860
1800 SUTTER ST STE 100
Concord, CA 94520
(925) 939-8585
✔ Accepts MedicareSame address
Michael Sacco, MD
Hand Surgery
NPI 1316050594
1800 SUTTER ST STE 100
Concord, CA 94520
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
Lucas Wilson, DPT
Physical Therapist in Private Practice
NPI 1184585259
1800 SUTTER ST STE 100
Concord, CA 94520
(925) 939-8585
✔ Accepts MedicareSame address
Jason Agdinaoay, PT, DPT
Physical Therapist in Private Practice
NPI 1790396901
1800 SUTTER ST STE 100
Concord, CA 94520
(925) 939-8585
✔ Accepts MedicareSame address
Ryan Chacko, DPT
Physical Therapist in Private Practice
NPI 1306612593
1800 SUTTER ST STE 100
Concord, CA 94520
(925) 939-8585
Same address
Liam Harris, MD
Orthopedic Surgery
NPI 1023544327
1800 SUTTER ST STE 100
Concord, CA 94520
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
Zachary Haynes, PT
Physical Therapist in Private Practice
NPI 1548996978
1800 SUTTER ST STE 100
Concord, CA 94520
(925) 939-8585
Same address
John Merson, MD
Orthopedic Surgery
NPI 1447363668
1800 SUTTER ST 100
Concord, CA 94520
(925) 691-0500
✔ PECOSSame address
Jennifer Lichti
Physical Therapist in Private Practice
NPI 1013554989
2996 GLENSIDE CT
Concord, CA 94520
(925) 768-9306
✔ Accepts Medicare1.5 mi
Desiree Agosto
Nurse Practitioner
NPI 1235907197
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts Medicare3.3 mi
Afshin Anoushiravani
Orthopedic Surgery
NPI 1003310293
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 256-2107
✔ PECOS3.3 mi
Lauren Baker, OTR
Occupational Therapist in Private Practice
NPI 1114669322
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ Accepts Medicare3.3 mi
Jason Balaoing
Occupational Therapist in Private Practice
NPI 1144714288
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
3.3 mi
Brian Bischoff
Physical Therapist in Private Practice
NPI 1518740034
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ Accepts Medicare3.3 mi
Matthew Pecci, M.D.
Family Practice
NPI 1699749754
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts Medicare3.3 mi
John Schilling, MD
Hand Surgery
NPI 1619199353
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts Medicare3.3 mi
Craig Wiseman, M.D.
Sports Medicine
NPI 1558386524
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts Medicare3.3 mi
Mark Christiansen, MD
Endocrinology
NPI 1821108218
2405 SHADELANDS DR STE 300
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS3.4 mi
Michael Chang, D.O.
Physical Medicine and Rehabilitation
NPI 1205934262
2405 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts Medicare3.4 mi
See all 210 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 Golden State Orthopedics & Spine's NPI number?

The NPI number for Golden State Orthopedics & Spine is 1427402783. It was assigned to this organization in the NPPES registry on April 22, 2016.

Where is Golden State Orthopedics & Spine located?

Golden State Orthopedics & Spine is located at 1800 Sutter St Suite 100, Concord, CA 94520. The listed phone number is (925) 939-8585.

What is Golden State Orthopedics & Spine's specialty?

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

Is Golden State Orthopedics & Spine enrolled in Medicare?

Yes. Golden State Orthopedics & Spine is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Golden State Orthopedics & Spine?

According to the CMS Revalidation Reassignment List (October 2026 release), 210 clinicians in 14 Medicare specialties reassign their Medicare billing to Golden State Orthopedics & Spine. 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 Physical Therapist in Private Practice (93), Orthopedic Surgery (55) and Occupational Therapist in Private Practice (24). Of these, 9 practice at this address and 74 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 Golden State Orthopedics & Spine was last updated on June 13, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.