Stefan Eric Lowenstein, MD
Dermatology Physician · Mill Valley, CA
Stefan Eric Lowenstein, MD is a dermatology physician with a practice address in Mill Valley, California, and NPI 1245728807, issued on Apr 28, 2018. Check the license (California A165056, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stefan Eric Lowenstein
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A165056 CA
Self-reported in NPPES; status is on the state search - Practice location
- 535 Miller Ave, Mill Valley, CA 94941
- Phone
- (415) 383-5475
- Enumerated
- Apr 28, 2018
- Record last updated
- Apr 23, 2026
- Fax
- (415) 383-1275
- Medicare enrollment
- Enrolled (PECOS I20220603001130); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 535 Miller Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeffrey Binstock, MDMOHS-Micrographic Surgery Physician1780677526
- Alexander Farr, D.D.S.General Practice Dentistry1518179241
- Mira Noble, NPNurse Practitioner1801743992
- Lewis Tanenbaum, MDDermatology Physician1083607808
Verify Stefan Eric Lowenstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A165056Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average dermatology physician in 2024
550 Medicare Part D claims for 273 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Ketoconazole74 claims
- Triamcinolone Acetonide70 claims
- Doxycycline Hyclate56 claims
- Hydrocortisone55 claims
- Minoxidil35 claims
- Fluorouracil30 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.
Industry payments in 2024: $2,027.07
87 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 10,250 providers of this specialty with any payment received $8,544.61 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 3 group practices
- Aesthetic Dermatology And Cosmetic Surgery Medical Associates IncMill Valley, CA
- Golden State Dermatology Associates, Inc.Saint Helena, CA
- Union Square Dermatology A Professional CorporationSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stefan Eric Lowenstein among 2,083 dermatology physician records in California
Stefan Eric Lowenstein, MD is one of 2,083 dermatology physician records with a practice address in California. 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 2018, is newer than 86% of them.
- NPI issued2018 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2018 · median 2006 among the 1,450 with a school on file
- Record last updated2026 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in Mill Valley → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Haydee Knott, MDMill Valley, CA 949411285808691
- David Laub, M.D.Mill Valley, CA 949411013187764
- Lewis Tanenbaum, MDMill Valley, CA 949411083607808
- Sarvenaz Zand, M.D.Mill Valley, CA 949411235216607
- Anne Zhuang, M.D.Mill Valley, CA 949411710277926
- Stephen Dalton, M.D.Novato, CA 949471053318824
- Kim Frederickson, MDNovato, CA 949471003995291
- Carla Fisher, M.D.Petaluma, CA 949541215934096
Common questions
What is Stefan Eric Lowenstein, MD's NPI number?
Stefan Eric Lowenstein, MD's National Provider Identifier (NPI) is 1245728807, issued on Apr 28, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Stefan Eric Lowenstein, MD located?
The NPPES record lists a practice address at 535 Miller Ave, Mill Valley, CA, 94941. Phone: (415) 383-5475. Providers update this record themselves, so call before visiting.
How can I verify Stefan Eric Lowenstein, MD's license?
NPPES lists California license number A165056, 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 Eric Lowenstein, MD prescribe under Medicare Part D?
In 2024, Stefan Eric Lowenstein, MD had 550 Medicare Part D claims for 273 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
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.