Marcus Williams, MD
NPI 1417026436 · Interventional Cardiology Physician · La Jolla, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marcus Williams, MD is a Interventional Cardiology Physician provider in La Jolla, CA (NPI 1417026436).
Provider details
- NPI number
- 1417026436
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 054048 (GA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
4,697 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,046 | $117 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 947 | $15 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 699 | $8 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 425 | $13 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 319 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 54 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 633 | 121 |
| Furosemide | 350 | 119 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 306 | 96 |
| Amlodipine Besylate | 304 | 104 |
| Rosuvastatin Calcium | 284 | 98 |
| Metoprolol Succinate | 265 | 80 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$509 across 10 records (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
- 2006-11-06
- Last updated
- 2009-06-30
Frequently asked questions
- What is Marcus Williams's NPI number?
- Marcus Williams's National Provider Identifier (NPI) is 1417026436, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcus Williams's specialty?
- Marcus Williams is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Marcus Williams located?
- Marcus Williams's practice location on file with NPPES is 10666 N Torrey Pines Road, La Jolla, CA 92037-1027.
- What is Marcus Williams's phone number?
- The practice phone number listed in the NPPES registry for Marcus Williams is (858) 554-5257.
- Does Marcus Williams accept Medicare?
- Marcus Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marcus Williams's NPI active?
- Yes — Marcus Williams's NPI (1417026436) is active in the NPPES registry as of the last update on 2009-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.