Lawrence R. Walker, MD
Orthopaedic Surgery Physician · Lake Arrowhead, CA
Lawrence R. Walker, MD is an orthopaedic surgery physician with a practice address in Lake Arrowhead, California, and NPI 1083619910, issued on Jun 16, 2005. Check the license (California C42773, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lawrence R. Walker
- Credential
- MD
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- C42773 CA
Self-reported in NPPES; status is on the state search - Practice location
- 29099 Hospital Road, Lake Arrowhead, CA 92352
- Phone
- (909) 726-6100
- Enumerated
- Jun 16, 2005
- Record last updated
- Jul 5, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (909) 557-1745
- Medicare enrollment
- Enrolled (PECOS I20050111000654); accepts Medicare assignment
- Medical or professional school
- University Of Virginia School Of Medicine, 1978
- Entity
- Type 1 · individual
Also registered at 29099 Hospital Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Guy Giacopuzzi, DDSDentist1154541506
- Shelley Hasselman, NPPrimary Care Nurse Practitioner1003126129
- Walter Maier, MD,MPHPreventive Medicine/Occupational Environmental Medicine Physician1235175233
- Jonathan Reed, PTPhysical Therapist1154986420
- Michelle Ricardo, MOTROccupational Therapist1427259795
- Colton Young, PT, DPTPhysical Medicine & Rehabilitation Physician1730997503
Verify Lawrence R. Walker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C42773Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7.4 times the Medicare Part D claims of the average orthopaedic surgery physician in 2024
2,564 Medicare Part D claims for 365 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 1% of claims. 1,651 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen951 claims
- Oxycodone-Acetaminophen482 claims
- Meloxicam135 claims
- Celecoxib102 claims
- Ibuprofen93 claims
- Diclofenac Sodium88 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 practice group's MIPS final score for 2023 (Medicare payment program): 67.8 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: $13.34
1 payment: food and beverage; the largest payer was Solventum Corporation. 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
- San Bernardino Medical Orthopaedic Group IncSan Bernardino, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (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 Lake Arrowhead →
Other orthopaedic surgery physician records in California
- Karim Abdollahi, M.D.Laguna Beach, CA1942240403
- Michael Abdulian, MDGlendale, CA1649469628
- Hussein Abdulrassoul, MDRiverside, CA1972123891
- Douglas Abeles, MDCastro Valley, CA1508961582
- Anthony Abene, MDSan Jose, CA1457437964
- Torgom Abraamyan, M.D.Van Nuys, CA1013370410
- Monther AbuhantashSan Francisco, CA1447041512
- Joshua Acebo, MDPalo Alto, CA1396373734
- Daniel Acevedo, M.D.Thousand Oaks, CA1184856122
- John Adams, MDLos Angeles, CA1215914114
Common questions
What is Lawrence R. Walker, MD's NPI number?
Lawrence R. Walker, MD's National Provider Identifier (NPI) is 1083619910, issued on Jun 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Lawrence R. Walker, MD located?
The NPPES record lists a practice address at 29099 Hospital Road, Lake Arrowhead, CA, 92352. Phone: (909) 726-6100. Providers update this record themselves, so call before visiting.
How can I verify Lawrence R. Walker, MD's license?
NPPES lists California license number C42773, 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 Lawrence R. Walker, MD prescribe under Medicare Part D?
In 2024, Lawrence R. Walker, MD had 2,564 Medicare Part D claims for 365 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is Lawrence R. Walker, MD's MIPS final score?
The 2023 MIPS final score is 67.8 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.