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GOLDEN STATE ORTHOPEDICS & SPINE
NPI 1972552990
Orthopaedic Surgery in Walnut Creek, CA

Active since May 08, 2006
2405 SHADELANDS DR, WALNUT CREEK, CA 94598(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 25, 2026.

Record update history: Jun 13, 2024, Mar 6, 2024, Jan 26, 2022 and 2 more (5 updates tracked since 2019).

About Golden State Orthopedics & Spine NPPES

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

GOLDEN STATE ORTHOPEDICS & SPINE (NPI 1972552990) is a healthcare organization registered as an orthopaedic surgery in Walnut Creek, California and active in the NPI registry since May 2006. The organization lists Stephen Hammarstrom, Ceo, as its authorized official.

NPPES Registry Identity

NPI1972552990
Entity TypeOrganization
Primary Taxonomy207X00000X
Legal Business NameGOLDEN STATE ORTHOPEDICS & SPINE
Location Address2405 SHADELANDS DRWalnut Creek, CA 94598-2444
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 DateMay 8, 2006
Last NPPES UpdateJune 13, 20245 updates tracked since enumeration
NPPES CertifiedJune 13, 2024
✔ NPI 1972552990 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.
2405 SHADELANDS DR, Walnut Creek, CA 94598
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Other Identifiers 1

Other6461930001Dme Supplier Ptan

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, 15 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
Cherlyn Alferos, FNP
Nurse Practitioner
NPI 1568155430
2405 SHADELANDS DR STE 300
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
Anna Franchesca Jensen, FNP
Nurse Practitioner
NPI 1477179018
2405 SHADELANDS DR STE 300
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
John Knight, M.D.
Orthopedic Surgery
NPI 1558310938
2405 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
Madison Nordman
Nurse Practitioner
NPI 1205408168
2405 SHADELANDS DR STE 300
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOSSame address
Mark Christiansen, MD
Endocrinology
NPI 1821108218
2405 SHADELANDS DR STE 300
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOSSame address
Leo Calafi, MD
Orthopedic Surgery
NPI 1720079072
2405 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOSSame address
Michael Chang, D.O.
Physical Medicine and Rehabilitation
NPI 1205934262
2405 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
Danielle Chapman, NP
Nurse Practitioner
NPI 1720930217
2405 SHADELANDS DR STE 300
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOSSame address
Sean Griffiths, D.O.
Orthopedic Surgery
NPI 1457705667
2405 SHADELANDS DR STE 300
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
Steven Lee, M.D.
Orthopedic Surgery
NPI 1699725945
2405 SHADELANDS DR STE 300
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
Joseph Narloch, M.D.
Physical Medicine and Rehabilitation
NPI 1902855885
2405 SHADELANDS DR STE 300
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
Abid Qureshi, M.D.
Orthopedic Surgery
NPI 1386694602
2405 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
George Tischenko, M.D.
Orthopedic Surgery
NPI 1639128572
2405 SHADELANDS DR STE 300
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
Louay Toma, M.D.
Orthopedic Surgery
NPI 1124077102
2405 SHADELANDS DR STE 300
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
Wendy Wong, M.D.
Orthopedic Surgery
NPI 1356584007
2405 SHADELANDS DR STE 300
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts MedicareSame address
James Albertson, DPT
Physical Therapist in Private Practice
NPI 1558919944
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 210-8500
✔ Accepts Medicare0.2 mi
Tyler Clark, MD
Orthopedic Surgery
NPI 1831453778
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts Medicare0.2 mi
Matthew Pecci, M.D.
Family Practice
NPI 1699749754
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts Medicare0.2 mi
John Schilling, MD
Hand Surgery
NPI 1619199353
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts Medicare0.2 mi
Craig Wiseman, M.D.
Sports Medicine
NPI 1558386524
2625 SHADELANDS DR
Walnut Creek, CA 94598
(925) 939-8585
✔ PECOS✔ Accepts Medicare0.2 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 1972552990. It was assigned to this organization in the NPPES registry on May 8, 2006.

Where is Golden State Orthopedics & Spine located?

Golden State Orthopedics & Spine is located at 2405 Shadelands Dr, Walnut Creek, CA 94598. 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, 15 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.