Mark Byrne, M.D.
NPI 1962411272 · Interventional Cardiology Physician · Watsonville, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Byrne, M.D. is a Interventional Cardiology Physician provider in Watsonville, CA (NPI 1962411272).
Provider details
- NPI number
- 1962411272
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G74388 (CA)
Specialties & taxonomies
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
11,021 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 | 2,438 | $141 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 1,060 | $63 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 1,050 | $9 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 877 | $68 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 556 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 124 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Carvedilol | 541 | 138 |
| Losartan Potassium | 512 | 156 |
| Atorvastatin Calcium | 477 | 144 |
| Rosuvastatin Calcium | 358 | 106 |
| Irbesartan | 324 | 85 |
| Montelukast Sodium | 275 | 82 |
| Metformin Hcl | 254 | 76 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,140 across 44 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
- 2006-08-05
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Byrne's NPI number?
- Mark Byrne's National Provider Identifier (NPI) is 1962411272, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Byrne's specialty?
- Mark Byrne is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Byrne located?
- Mark Byrne's practice location on file with NPPES is 30 Brennan St, Watsonville, CA 95076-4303.
- What is Mark Byrne's phone number?
- The practice phone number listed in the NPPES registry for Mark Byrne is (831) 768-0220.
- Does Mark Byrne accept Medicare?
- Mark Byrne is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Byrne's NPI active?
- Yes — Mark Byrne's NPI (1962411272) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.