Leonard Marks, M.D.
NPI 1811037450 · Urology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leonard Marks, M.D. is a Urology Physician provider in Los Angeles, CA (NPI 1811037450).
Provider details
- NPI number
- 1811037450
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- C34148 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,452 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 736 | $100 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 532 | $141 |
| Biopsy of Prostate Gland55700 | 223 | $269 |
| Ultrasound Scan of Pelvic Region Through Rectum76872 | 223 | $161 |
| 3d Radiographic Procedure With Computerized Image Postprocessing76377 | 220 | $88 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Alfuzosin Hclbrand: Alfuzosin Hcl Er | 147 | 66 |
| Silodosin | 76 | 37 |
| Finasteride | 64 | 35 |
| Tamsulosin Hcl | 34 | 16 |
| Mirabegronbrand: Myrbetriq | 25 | 11 |
| Levofloxacin | 16 | 16 |
| Dutasteride | 13 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$33 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-06
- Last updated
- 2020-01-09
- Certified
- 2020-01-09
Frequently asked questions
- What is Leonard Marks's NPI number?
- Leonard Marks's National Provider Identifier (NPI) is 1811037450, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonard Marks's specialty?
- Leonard Marks is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Leonard Marks located?
- Leonard Marks's practice location on file with NPPES is 200 Ucla Medical Plz Ste 140, Los Angeles, CA 90095-6835.
- What is Leonard Marks's phone number?
- The practice phone number listed in the NPPES registry for Leonard Marks is (310) 794-7152.
- Does Leonard Marks accept Medicare?
- Leonard Marks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leonard Marks's NPI active?
- Yes — Leonard Marks's NPI (1811037450) is active in the NPPES registry as of the last update on 2020-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.