William Buchanan Workman, M.D.
Orthopaedic Surgery Physician · Walnut Creek, CA
William Buchanan Workman, M.D. is an orthopaedic surgery physician with a practice address in Walnut Creek, California, and NPI 1952376352, issued on Feb 20, 2006. Check the license (California A72343, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Buchanan Workman
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- A72343 CA
Self-reported in NPPES; status is on the state search - Practice location
- 390 N Wiget LN Ste 100, Walnut Creek, CA 94598
- Phone
- (925) 944-0110
- Enumerated
- Feb 20, 2006
- Record last updated
- Feb 10, 2025
- Fax
- (925) 944-0960
- Medicare enrollment
- Enrolled (PECOS I20040810000407); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1994
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →
Verify William Buchanan Workman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A72343Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
295 Medicare Part D claims for 137 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. 158 claims were for opioids.
Most prescribed
- Oxycodone-Acetaminophen97 claims
- Hydrocodone-Acetaminophen43 claims
- Cephalexin40 claims
- Hydroxyzine Pamoate29 claims
- Tramadol Hcl17 claims
- Celecoxib16 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.
The MIPS final score for 2023 (Medicare payment program): 87.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $7,733.75
22 payments; by number, the most common kind was food and beverage; the largest payer was Arthrex, Inc. The 15,003 providers of this specialty with any payment received $23,022.89 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
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
- Bass Medical GroupAlamo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Buchanan Workman among 2,276 orthopaedic surgery physician records in California
William Buchanan Workman, M.D. is one of 2,276 orthopaedic surgery physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 46% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1994 · median 2003 among the 1,347 with a school on file
- Record last updated2025 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in California
There are 2,276 orthopaedic surgery physician records in California.
All 2,276 in California → Every provider in Walnut Creek → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Afshin AnoushiravaniWalnut Creek, CA 945981003310293
- Robert Buckley, M.D.Walnut Creek, CA 945981952351280
- Leo Calafi, MDWalnut Creek, CA 945981720079072
- David Contreras, M.D.Walnut Creek, CA 945981821048216
- Robert Flaig, M.D.Walnut Creek, CA 945981386818102
- Sean Griffiths, D.O.Walnut Creek, CA 945981457705667
- John Knight, M.D.Walnut Creek, CA 945981558310938
- John Kronick, M.D.Walnut Creek, CA 945981639129034
Common questions
What is William Buchanan Workman, M.D.'s NPI number?
William Buchanan Workman, M.D.'s National Provider Identifier (NPI) is 1952376352, issued on Feb 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Buchanan Workman, M.D. located?
The NPPES record lists a practice address at 390 N Wiget LN Ste 100, Walnut Creek, CA, 94598. Phone: (925) 944-0110. Providers update this record themselves, so call before visiting.
How can I verify William Buchanan Workman, M.D.'s license?
NPPES lists California license number A72343, 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 William Buchanan Workman, M.D. prescribe under Medicare Part D?
In 2024, William Buchanan Workman, M.D. had 295 Medicare Part D claims for 137 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is William Buchanan Workman, M.D.'s MIPS final score?
The 2023 MIPS final score is 87.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.
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.