Justin John Sonderegger, MD
Emergency Medicine Physician · Reno, NV
Justin John Sonderegger, MD is an emergency medicine physician with a practice address in Reno, Nevada, and NPI 1588890693, issued on Jun 3, 2009. Check the license (Nevada 14275, as entered in NPPES) on the Nevada State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Justin John Sonderegger
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 14275 NV
4301094467 MI
Self-reported in NPPES; status is on the state search - Practice location
- 832 Willow St, Reno, NV 89502
- Phone
- (775) 324-4040
- Enumerated
- Jun 3, 2009
- Record last updated
- Jul 2, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (775) 324-4042
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 575 in Nevada → Look up another NPI →
Also registered at 832 Willow St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daryl Di Rocco, M.D.Emergency Medicine Physician1780903666
Verify Justin John Sonderegger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNevada State Board of Medical Examiners
Search for license 14275Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% fewer Medicare Part D claims than the average emergency medicine physician in 2024
150 Medicare Part D claims for 97 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Ondansetron Odt15 claims
- Sulfamethoxazole-Trimethoprim15 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): 91.6 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).
Justin John Sonderegger among 575 emergency medicine physician records in Nevada
Justin John Sonderegger, MD is one of 575 emergency medicine physician records with a practice address in Nevada. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 47% of them.
- NPI issued2009 · 47% of these records are older, 50% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2012 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Nevada practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Nevada
There are 575 emergency medicine physician records in Nevada.
All 575 in Nevada → Every provider in Reno → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Mark Baier, MDReno, NV 895021457310377
- Thea Berning, MDReno, NV 895021033178249
- Kevin Brown, DOReno, NV 895021528027455
- Curtis Brown, MDReno, NV 895021760441695
- Cari Croghan, MDReno, NV 895021760441901
- Robert Darzynkiewicz, MDReno, NV 895021811956063
- Gary Gansert, MDReno, NV 895021124087390
- Rebecca Gelber, MDReno, NV 895021619936812
Common questions
What is Justin John Sonderegger, MD's NPI number?
Justin John Sonderegger, MD's National Provider Identifier (NPI) is 1588890693, issued on Jun 3, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Justin John Sonderegger, MD located?
The NPPES record lists a practice address at 832 Willow St, Reno, NV, 89502. Phone: (775) 324-4040. Providers update this record themselves, so call before visiting.
How can I verify Justin John Sonderegger, MD's license?
NPPES lists Nevada license number 14275, as entered by the provider. Search the Nevada State Board of Medical Examiners at https://medboard.nv.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Justin John Sonderegger, MD prescribe under Medicare Part D?
In 2024, Justin John Sonderegger, MD had 150 Medicare Part D claims for 97 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Justin John Sonderegger, MD's MIPS final score?
The 2023 MIPS final score is 91.6 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.