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JOSEPH S. B. BUCK M.D.
NPI 1366837304
Orthopaedic Surgery - Adult Reconstructive Orthopaedic Surgery in Walnut Creek, CA

Active since April 06, 2015PECOS EnrolledAccepts Medicare Assignment
1425 S MAIN ST, WALNUT CREEK, CA 94596(925) 295-4130 Get Directions Write a Review

NPPES record last updated: December 7, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 7, 2022, Oct 5, 2022, Nov 11, 2021 and 1 more (4 updates tracked since 2021).

About Joseph S. B. Buck M.d. NPPES

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

JOSEPH S. B. BUCK M.D. (NPI 1366837304) is an individual adult reconstructive orthopaedic surgery provider in Walnut Creek, California, licensed in California (A177636) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Emory University School Of Medicine (2015).

NPPES Registry Identity

NPI1366837304
Entity TypeIndividualMale
Primary Taxonomy207XS0114X
Provider Legal NameJOSEPH S. B. BUCKCredential: M.D.
Location Address1425 S MAIN STWalnut Creek, CA 94596-5318
Mailing Address1425 S Main StWalnut Creek, CA 94596-5318 · (925) 295-4130
Phone(925) 295-4130
Sole ProprietorNo
Medical School CMSEmory University School Of MedicineGraduated 2015
Enumeration DateApril 6, 2015
Last NPPES UpdateDecember 7, 20224 updates tracked since enumeration
NPPES CertifiedDecember 7, 2022
✔ NPI 1366837304 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOrthopaedic Surgery · Adult Reconstructive Orthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207XS0114X
Licenses✔ Licensed in CA · A177636✔ Licensed in UT · 12247277-1205
Definition
Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, adult reconstructive orthopaedic surgeons deal with reconstructive procedures such as joint arthroplasty (i.e., hip and knee), osteotomy, arthroscopy, soft-tissue reconstruction, and a variety of other adult reconstructive surgical procedures.
Also ListedOrthopaedic SurgeryTaxonomy 207X00000X · License 210028 (NC)
1425 S MAIN ST, Walnut Creek, CA 94596
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1590 S Wakara WaySalt Lake City, UT 84108-1200 · Phone (801) 587-5448
Location 21025 Morehead Medical Dr Ste 300Charlotte, NC 28204-2966 · Phone (704) 446-2772 · Fax (704) 335-2476

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Joseph S. B. Buck M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID446659197
PECOS Enrollment IDI20221024000666
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Joseph Buck reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
17 mi
Internal Medicine
901 NEVIN
Richmond, CA 94801
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1235226531 (510) 307-1555

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BROOK ANDREW WOOLLEY M.D.
Emergency Medicine
1425 S MAIN ST, EMERGENCY MEDICINE DEPARTMENT
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-5100
DR. THOMAS CRESANTE D.O.
Hospitalist
1425 S MAIN ST, KAISER PERMANENTE WALNUT CREEK ATTN: HBS DEPT
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4643
SARA WON MD
Obstetrics & Gynecology
1425 S MAIN ST
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4040
KAISER PERMANENTE
General Acute Care Hospital
1425 S MAIN ST
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4000
MICHELLE CABLE VU CRNA
Nurse Anesthetist, Certified Registered
1425 S MAIN ST
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4000
DR. JESUS GIL JIMENEZ MD
Surgery (Vascular Surgery)
1425 S MAIN ST
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4110
MR. EDWARD HAL PIECZENIK L.C.S.W.
Social Worker (Clinical)
1425 S MAIN ST
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-5237
CARLOS A. CROMEYER MD
Psychiatry & Neurology (Neurology)
1425 S MAIN ST
WALNUT CREEK, CA 94596
Contra Costa County (925) 295-4000

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 Joseph Buck's NPI number?

The NPI number for Joseph Buck is 1366837304. It was assigned to this individual provider in the NPPES registry on April 6, 2015.

Where is Joseph Buck located?

Joseph Buck practices at 1425 S Main St, Walnut Creek, CA 94596. The listed phone number is (925) 295-4130.

What is Joseph Buck's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Adult Reconstructive Orthopaedic Surgery, with taxonomy code 207XS0114X.

Is Joseph Buck enrolled in Medicare?

Yes. Joseph Buck is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Joseph Buck's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joseph Buck reassigns Medicare benefits to Permanente Medical Group Inc (Richmond, CA). The 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 Joseph Buck's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Joseph Buck was last updated on December 7, 2022. 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.