Alexis Korostoff Rieber, MD
Otolaryngology Physician · Pasadena, CA
Alexis Korostoff Rieber, MD is an otolaryngology physician with a practice address in Pasadena, California, and NPI 1659623429, issued on Oct 4, 2012. Check the license (California A123143, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alexis Korostoff Rieber
- Credential
- MD
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- A123143 CA
Self-reported in NPPES; status is on the state search - Practice location
- 630 S Raymond Ave Unit 201, Pasadena, CA 91105
- Phone
- (424) 314-0196
- Enumerated
- Oct 4, 2012
- Record last updated
- Dec 2, 2022
- Medicare enrollment
- Enrolled (PECOS I20170802000117); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 1,212 in California → Look up another NPI →
Also registered at 630 S Raymond Ave Unit 201
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Taylor Carle, MDOtolaryngology Physician1548673692
Verify Alexis Korostoff Rieber in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A123143Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average otolaryngology physician in 2024
54 Medicare Part D claims for 27 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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): 85.7 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: $944.74
10 payments; by number, the most common kind was food and beverage; the largest payer was Stryker Corporation. The 6,429 providers of this specialty with any payment received $1,922.50 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
- Cedars-Sinai Medical Care FoundationPasadena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexis Korostoff Rieber among 1,212 otolaryngology physician records in California
Alexis Korostoff Rieber, MD is one of 1,212 otolaryngology physician records with a practice address in California. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 74% of them.
- NPI issued2012 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2011 · median 2004 among the 818 with a school on file
- Record last updated2022 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in California
There are 1,212 otolaryngology physician records in California.
All 1,212 in California → Every provider in Pasadena → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Steven Battaglia, M.D.Pasadena, CA 911051437178951
- Charles Battaglia, M.D.Pasadena, CA 911051518973544
- Taylor Carle, MDPasadena, CA 911051548673692
- Ani Mnatsakanian, DOPasadena, CA 911051134743206
- Jordan Sukys, MDPasadena, CA 911051922537414
- Karen Peterson, MDPasadena, CA 911061518970235
- Michael Schwartz, MDPasadena, CA 911061922094382
- Harmon Schwartz, MDPasadena, CA 911071720172323
Common questions
What is Alexis Korostoff Rieber, MD's NPI number?
Alexis Korostoff Rieber, MD's National Provider Identifier (NPI) is 1659623429, issued on Oct 4, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Alexis Korostoff Rieber, MD located?
The NPPES record lists a practice address at 630 S Raymond Ave Unit 201, Pasadena, CA, 91105. Phone: (424) 314-0196. Providers update this record themselves, so call before visiting.
How can I verify Alexis Korostoff Rieber, MD's license?
NPPES lists California license number A123143, 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 Alexis Korostoff Rieber, MD prescribe under Medicare Part D?
In 2024, Alexis Korostoff Rieber, MD had 54 Medicare Part D claims for 27 beneficiaries; the average among otolaryngology physician prescribers was 541. Part D covers Medicare prescriptions only.
What is Alexis Korostoff Rieber, MD's MIPS final score?
The 2023 MIPS final score is 85.7 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.