John Stephen Locke, M.D.
Orthopaedic Surgery Physician · Corona, CA
John Stephen Locke, M.D. is an orthopaedic surgery physician with a practice address in Corona, California, and NPI 1467520189, issued on Dec 1, 2006. Check the license (California G77841, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Stephen Locke
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- G77841 CA
Self-reported in NPPES; status is on the state search - Practice location
- 341 Magnolia Ave, Corona, CA 92879
- Phone
- (951) 735-6060
- Enumerated
- Dec 1, 2006
- Record last updated
- Sep 21, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20041123001125); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →
Also registered at 341 Magnolia Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bradley Baum, MDOrthopaedic Surgery Physician1205847654
- Ralph Gozun, DPTPhysical Therapist1508283664
- Michael HashemiPhysical Therapist1356772552
- Jamie Hess, N.P.Women's Health Nurse Practitioner1104196120
- Hillary Houseman, PA-CPhysician Assistant1952469371
- Neilvon LangasPhysical Therapist1174954366
Verify John Stephen Locke in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G77841Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
24 Medicare Part D claims for 13 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 14 claims were for opioids.
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 practice group's MIPS final score for 2023 (Medicare payment program): 75 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $49.76
2 payments; by number, the most common kind was food and beverage; the largest payer was Vision Quest Industries 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
- United Medical DoctorsMurrieta, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Stephen Locke among 2,276 orthopaedic surgery physician records in California
John Stephen Locke, 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
- Graduated1986 · median 2003 among the 1,347 with a school on file
- Record last updated2012 · 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 Corona → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Bradley Baum, MDCorona, CA 928791205847654
- Vicente Bernabe, D.O.Corona, CA 928791164483699
- Mitchell Geiger, MDCorona, CA 928791235149675
- Nasser Heyrani, M.D.Corona, CA 928791730523945
- Jeff KimballCorona, CA 928791750814182
- Mitchell McDowell, DOCorona, CA 928791063711976
- Paul Reiman, MDCorona, CA 928791578532545
- Reza Roghani, M.D.Corona, CA 928791386941219
Common questions
What is John Stephen Locke, M.D.'s NPI number?
John Stephen Locke, M.D.'s National Provider Identifier (NPI) is 1467520189, issued on Dec 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Stephen Locke, M.D. located?
The NPPES record lists a practice address at 341 Magnolia Ave, Corona, CA, 92879. Phone: (951) 735-6060. Providers update this record themselves, so call before visiting.
How can I verify John Stephen Locke, M.D.'s license?
NPPES lists California license number G77841, 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 John Stephen Locke, M.D. prescribe under Medicare Part D?
In 2024, John Stephen Locke, M.D. had 24 Medicare Part D claims for 13 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is John Stephen Locke, M.D.'s MIPS final score?
The 2023 MIPS final score is 75 of 100, reported for the practice group. 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.