Mark Adam Lassoff, MD, MBA, MPH
Urology Physician · Los Angeles, CA
Mark Adam Lassoff, MD, MBA, MPH is a urology physician with a practice address in Los Angeles, California, and NPI 1760633549, issued on Oct 9, 2008. Check the license (California 93400, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Adam Lassoff
- Credential
- MD, MBA, MPH
- Primary taxonomy
- Urology Physician 208800000X
- License number
- 93400 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1200 N State St, Los Angeles, CA 90033
- Phone
- (323) 226-7335
- Enumerated
- Oct 9, 2008
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100726000297); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 1200 N State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sadeea Abbasi, M.D., PH.D.Gastroenterology Physician1366713513
- Danna Abdel-Khader, MDInternal Medicine Physician1780977827
- Terri Leigh Abe, MDInternal Medicine Physician1881897569
- Beza Abebe, MDStudent in an Organized Health Care Education/Training Program1558823674
- Mona Abedzadeh, M.A CCC-SLPSpeech-Language Pathologist1699988451
- Zachary AbelsonObstetrics & Gynecology Physician1689237414
Verify Mark Adam Lassoff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 93400Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7% fewer Medicare Part D claims than the average urology physician in 2024
1,250 Medicare Part D claims for 356 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D.
Most prescribed
- Finasteride372 claims
- Tamsulosin Hcl356 claims
- Terazosin Hcl213 claims
- Potassium Citrate Er87 claims
- Trospium Chloride66 claims
- Allopurinol33 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Urology Physician providers in California
There are 1,524 urology physician records in California.
Other urology physician records in California
- David Aaronson, MDOakland, CA1215053129
- Jason Abber, MDPanorama City, CA1356366926
- Marc Abboud, MDLos Alamitos, CA1265096531
- George AbdelsayedAnaheim, CA1568721843
- Garen AbediDowney, CA1285909051
- Jennifer Abidari, MDStanford, CA1811098197
- Sherif Aboseif, MDOxnard, CA1093882995
- Parwiz Abrahimi, M.D., PH.D.Los Angeles, CA1154857613
- Anthony Acquaviva, MDVallejo, CA1457439283
- Theodore Affue, M.D.El Centro, CA1386674000
Common questions
What is Mark Adam Lassoff, MD, MBA, MPH's NPI number?
Mark Adam Lassoff, MD, MBA, MPH's National Provider Identifier (NPI) is 1760633549, issued on Oct 9, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Mark Adam Lassoff, MD, MBA, MPH located?
The NPPES record lists a practice address at 1200 N State St, Los Angeles, CA, 90033. Phone: (323) 226-7335. Providers update this record themselves, so call before visiting.
How can I verify Mark Adam Lassoff, MD, MBA, MPH's license?
NPPES lists California license number 93400, 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 Mark Adam Lassoff, MD, MBA, MPH prescribe under Medicare Part D?
In 2024, Mark Adam Lassoff, MD, MBA, MPH had 1,250 Medicare Part D claims for 356 beneficiaries; the average among urology physician prescribers was 1,340. 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.