Stefan Unterhalter, M.D.
Nephrology Physician · Beverly Hills, CA
Stefan Unterhalter, M.D. is a nephrology physician with a practice address in Beverly Hills, California, and NPI 1619023249, issued on Jan 26, 2007. Check the license (California A33152, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stefan Unterhalter
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A33152 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9001 Wilshire Blvd, Beverly Hills, CA 90211
- Phone
- (310) 274-2722
- Enumerated
- Jan 26, 2007
- Entity
- Type 1 · individual
Also registered at 9001 Wilshire Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stefan Unterhalter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A33152Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
2.9 times the Medicare Part D claims of the average nephrology physician in 2024
4,329 Medicare Part D claims for 317 beneficiaries, against an average of 1,511 among the 8,473 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 98 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium231 claims
- Zolpidem Tartrate201 claims
- Losartan Potassium194 claims
- Amlodipine Besylate193 claims
- Atorvastatin Calcium175 claims
- Levothyroxine Sodium108 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 Medicare quality score for 2023: 18.2 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).
Industry payments in 2024: $605.07
9 payments, mostly food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 6,365 providers of this specialty with any payment received $3,068.36 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.
Nephrology Physician providers in California
There are 1,165 nephrology physician records in California.
Other nephrology physician records in California
- Antoine Abcar, MDLos Angeles, CA1245301159
- Basmah Abdalla, M.D.Los Angeles, CA1629394002
- Omaran Abdeen, M.D.Mission Hills, CA1700878410
- Anas Abou-Ismail, MDPalm Springs, CA1598078784
- Sreedhar Adapa, M.D.Visalia, CA1881997872
- Gbemisola Adenuga, M.D.Los Angeles, CA1952464661
- Adegbenga Adetola, MDLynwood, CA1881776219
- Judy Adler, M.D.San Diego, CA1326043894
- Sharon Adler, M.D.Torrance, CA1467431122
- Maryam Afkarian, M.D., PH.D.Sacramento, CA1255387338
Common questions
What is Stefan Unterhalter, M.D.'s NPI number?
Stefan Unterhalter, M.D.'s National Provider Identifier (NPI) is 1619023249, issued on Jan 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Stefan Unterhalter, M.D. located?
The NPPES record lists a practice address at 9001 Wilshire Blvd, Beverly Hills, CA, 90211. Phone: (310) 274-2722. Providers update this record themselves, so call before visiting.
How can I verify Stefan Unterhalter, M.D.'s license?
NPPES lists California license number A33152, 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 Stefan Unterhalter, M.D. prescribe under Medicare Part D?
In 2024, Stefan Unterhalter, M.D. had 4,329 Medicare Part D claims for 317 beneficiaries; the average among nephrology physician prescribers was 1,511. Part D covers Medicare prescriptions only.
What is Stefan Unterhalter, M.D.'s Medicare quality score?
The 2023 MIPS final score is 18.2 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.