Richard C. Diehl, M.D.
Orthopaedic Surgery Physician · Pasadena, CA
Richard C. Diehl, M.D. is an orthopaedic surgery physician with a practice address in Pasadena, California, and NPI 1417943127, issued on Sep 27, 2005. Check the license (California G15733, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Richard C. Diehl
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- G15733 CA
Self-reported in NPPES; status is on the state search - Practice location
- 800 S Raymond Ave, Pasadena, CA 91105
- Phone
- (626) 795-8051
- Enumerated
- Sep 27, 2005
- Record last updated
- Jan 26, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (626) 795-0356
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →
Also registered at 800 S Raymond Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gregory Adamson, M.D.Sports Medicine (Orthopaedic Surgery) Physician1972590610
- Lea Armendariz, PTPhysical Therapist1427327147
- Roy Ashford, M.D.Orthopaedic Surgery of the Spine Physician1588646368
- Julie Cann, PA-CPhysician Assistant1972734929
- William Costigan, M.D.Orthopaedic Surgery of the Spine Physician1821084641
- Todd Dietrick, M.D.Adult Reconstructive Orthopaedic Surgery Physician1619963444
Verify Richard C. Diehl in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G15733Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 76.6 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).
Richard C. Diehl among 2,276 orthopaedic surgery physician records in California
Richard C. Diehl, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2009 · 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 Pasadena → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Kristen Combs, MDPasadena, CA 911051639676968
- Joseph Durso, MDPasadena, CA 911051356876924
- Timothy Jackson, M.D.Pasadena, CA 911051245481266
- John Lusche, M.D.Pasadena, CA 911051235144882
- Torre Soderlund, MDPasadena, CA 911051407317266
- Carly Williams, MDPasadena, CA 911061609321751
- Daniel Laster, MDPasadena, CA 911071457353062
- Donald Norquist, MDPasadena, CA 911071831191410
Common questions
What is Richard C. Diehl, M.D.'s NPI number?
Richard C. Diehl, M.D.'s National Provider Identifier (NPI) is 1417943127, issued on Sep 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Richard C. Diehl, M.D. located?
The NPPES record lists a practice address at 800 S Raymond Ave, Pasadena, CA, 91105. Phone: (626) 795-8051. Providers update this record themselves, so call before visiting.
How can I verify Richard C. Diehl, M.D.'s license?
NPPES lists California license number G15733, 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.
What is Richard C. Diehl, M.D.'s MIPS final score?
The 2023 MIPS final score is 76.6 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.