Lewis Tanenbaum, MD
Dermatology Physician · Mill Valley, CA
Lewis Tanenbaum, MD is a dermatology physician with a practice address in Mill Valley, California, and NPI 1083607808, issued on Aug 26, 2005. Check the license (California G31735, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lewis Tanenbaum
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- G31735 CA
Self-reported in NPPES; status is on the state search - Practice location
- 535 Miller Ave, Mill Valley, CA 94941
- Phone
- (415) 383-5486
- Enumerated
- Aug 26, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (415) 389-7455
- 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.
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- Stefan Lowenstein, MDDermatology Physician1245728807
- Mira Noble, NPNurse Practitioner1801743992
Verify Lewis Tanenbaum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G31735Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average dermatology physician in 2024
90 Medicare Part D claims for 51 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Triamcinolone Acetonide21 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.
Lewis Tanenbaum among 2,083 dermatology physician records in California
Lewis Tanenbaum, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- 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
- Stefan Lowenstein, MDMill Valley, CA 949411245728807
- 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 Lewis Tanenbaum, MD's NPI number?
Lewis Tanenbaum, MD's National Provider Identifier (NPI) is 1083607808, issued on Aug 26, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Lewis Tanenbaum, MD located?
The NPPES record lists a practice address at 535 Miller Ave, Mill Valley, CA, 94941. Phone: (415) 383-5486. Providers update this record themselves, so call before visiting.
How can I verify Lewis Tanenbaum, MD's license?
NPPES lists California license number G31735, 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 Lewis Tanenbaum, MD prescribe under Medicare Part D?
In 2024, Lewis Tanenbaum, MD had 90 Medicare Part D claims for 51 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.