NPPES file of Aug 9, 2026

Joseph S. B. Buck, M.D.

Adult Reconstructive Orthopaedic Surgery Physician · Walnut Creek, CA

Joseph S. B. Buck, M.D. is an adult reconstructive orthopaedic surgery physician with a practice address in Walnut Creek, California, and NPI 1366837304, issued on Apr 6, 2015. Check the license (California A177636, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1366837304
Name
Joseph S. B. Buck
Credential
M.D.
Primary taxonomy
Adult Reconstructive Orthopaedic Surgery Physician 207XS0114X
License numbers
A177636 CA
210028 NC
12247277-1205 UT
Self-reported in NPPES; status is on the state search
Practice location
1425 S Main St, Walnut Creek, CA 94596
Phone
(925) 295-4130
Enumerated
Apr 6, 2015
Record last updated
Dec 7, 2022
Medicare enrollment
Enrolled (PECOS I20221024000666); accepts Medicare assignment
Medical or professional school
Emory University School Of Medicine, 2015
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest adult reconstructive orthopaedic surgery physician records → All 147 in California → Look up another NPI →

Also registered at 1425 S Main St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Eric AaserudeEmergency Medicine Physician1811491194
  2. Derek Abbassi, MDObstetrics & Gynecology Physician1841364155
  3. Peter Ackerman, MDEmergency Medicine Physician1427435023
  4. Aaron Mark Acosta, DOEmergency Medicine Physician1538789987
  5. Basil Adad, MDOtolaryngology Physician1487732574
  6. Derek Ailes, M.D.Emergency Medical Services (Emergency Medicine) Physician1992001804

Verify Joseph S. B. Buck in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A177636    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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64% fewer Medicare Part D claims than the average adult reconstructive orthopaedic surgery physician in 2024

208 Medicare Part D claims for 83 beneficiaries, against an average of 579 among the 1,112 providers of this specialty who prescribed in Part D. 101 claims were for opioids.

  1. Joseph Buck208
  2. Specialty average579

Most prescribed

  1. Oxycodone Hcl82 claims
  2. Meloxicam26 claims
  3. Celecoxib24 claims
  4. Ibuprofen20 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $408.88

6 payments; by number, the most common kind was food and beverage; the largest payer was Zimmer Biomet Holdings, Inc. The 1,060 providers of this specialty with any payment received $68,015.27 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Joseph Buck$409
  2. Specialty average$68,015

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Permanente Medical Group IncAntioch, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Joseph S. B. Buck among 147 adult reconstructive orthopaedic surgery physician records in California

Joseph S. B. Buck, M.D. is one of 147 adult reconstructive orthopaedic surgery physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 73% of them.

  • NPI issued2015 · 73% of these records are older, 20% newer
  • In a Medicare fileYes · 88% of these records are
  • In the CMS Doctors and Clinicians fileYes · 76% of these records are
  • Graduated2015 · median 2009 among the 112 with a school on file
  • Record last updated2022 · 47% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XS0114X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Adult Reconstructive Orthopaedic Surgery Physician providers in California

There are 147 adult reconstructive orthopaedic surgery physician records in California.

All 147 in California → Every provider in Walnut Creek → Adult Reconstructive Orthopaedic Surgery Physician nationwide →

The 8 adult reconstructive orthopaedic surgery physician records with the nearest ZIP codes

  1. Stefan Jibodh, M.D.Walnut Creek, CA 945961508875642
  2. Vincent Yamamoto, M.D.Walnut Creek, CA 945961629192240
  3. Wendy Wong, M.D.Walnut Creek, CA 945981356584007
  4. Ryan Moore, MDSaint Helena, CA 945741528266202
  5. Alexander Bradley, MDDublin, CA 945681194259077
  6. Aaron Salyapongse, MDDublin, CA 945681598711681
  7. John Diana, M.D.Napa, CA 945581649297540
  8. Alexander Sah, MDFremont, CA 945381003966359

Common questions

What is Joseph S. B. Buck, M.D.'s NPI number?

Joseph S. B. Buck, M.D.'s National Provider Identifier (NPI) is 1366837304, issued on Apr 6, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Joseph S. B. Buck, M.D. located?

The NPPES record lists a practice address at 1425 S Main St, Walnut Creek, CA, 94596. Phone: (925) 295-4130. Providers update this record themselves, so call before visiting.

How can I verify Joseph S. B. Buck, M.D.'s license?

NPPES lists California license number A177636, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Joseph S. B. Buck, M.D. prescribe under Medicare Part D?

In 2024, Joseph S. B. Buck, M.D. had 208 Medicare Part D claims for 83 beneficiaries; the average among adult reconstructive orthopaedic surgery physician prescribers was 579. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.