Leonard S. Marks, M.D.
Urology Physician · Los Angeles, CA
Leonard S. Marks, M.D. is a urology physician with a practice address in Los Angeles, California, and NPI 1811037450, issued on Feb 6, 2007. Check the license (California C34148, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Leonard S. Marks
- Credential
- M.D.
- Primary taxonomy
- Urology Physician 208800000X
- License number
- C34148 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 Ucla Medical Plz Ste 140, Los Angeles, CA 90095
- Phone
- (310) 794-7152
- Enumerated
- Feb 6, 2007
- Record last updated
- Jan 9, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (310) 794-1666
- Medicare enrollment
- Enrolled (PECOS I20060313000276); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical Branch At Galveston, 1969
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest urology physician records → All 1,524 in California → Look up another NPI →
Also registered at 200 Ucla Medical Plz Ste 140
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jeremy Blumberg, M.D.Urology Physician1982889622
- Wayne Brisbane, M.D.Urology Physician1346583176
- Michelle Cardenas, NPNurse Practitioner1548036817
Verify Leonard S. Marks in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C34148Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average urology physician in 2024
442 Medicare Part D claims for 164 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Alfuzosin Hcl Er147 claims
- Silodosin76 claims
- Finasteride64 claims
- Tamsulosin Hcl34 claims
- Myrbetriq25 claims
- Levofloxacin16 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): 81.1 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: $32.77
1 payment: food and beverage; the largest payer was Abbvie Inc. The 9,340 providers of this specialty with any payment received $3,800.04 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
- The Regents OF The University OF CaliforniaLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leonard S. Marks among 1,524 urology physician records in California
Leonard S. Marks, M.D. is one of 1,524 urology physician records with a practice address in California. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 49% of them.
- NPI issued2007 · 49% of these records are older, 40% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1969 · median 2003 among the 1,049 with a school on file
- Record last updated2020 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in California
There are 1,524 urology physician records in California.
All 1,524 in California → Every provider in Los Angeles → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- William Aronson, MDLos Angeles, CA 900951639194095
- Arie Belldegrun, MDLos Angeles, CA 900951013932847
- Karim Chamie, M.D.Los Angeles, CA 900951962478420
- Jean Dekernion, MDLos Angeles, CA 900951871518613
- Richard Ehrlich, MD, FACS, FAAPLos Angeles, CA 900951578560413
- Isla Garraway, MDLos Angeles, CA 900951356366116
- Hans Gritsch, MDLos Angeles, CA 900951720006976
- Stuart HoldenLos Angeles, CA 900951013941483
Common questions
What is Leonard S. Marks, M.D.'s NPI number?
Leonard S. Marks, M.D.'s National Provider Identifier (NPI) is 1811037450, issued on Feb 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Leonard S. Marks, M.D. located?
The NPPES record lists a practice address at 200 Ucla Medical Plz Ste 140, Los Angeles, CA, 90095. Phone: (310) 794-7152. Providers update this record themselves, so call before visiting.
How can I verify Leonard S. Marks, M.D.'s license?
NPPES lists California license number C34148, 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 Leonard S. Marks, M.D. prescribe under Medicare Part D?
In 2024, Leonard S. Marks, M.D. had 442 Medicare Part D claims for 164 beneficiaries; the average among urology physician prescribers was 1,340. Part D covers Medicare prescriptions only.
What is Leonard S. Marks, M.D.'s MIPS final score?
The 2023 MIPS final score is 81.1 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.