Physician Profile
Unclaimed ProfileAbout BYRNE
Mark Gerard Byrne, M.D. is a healthcare provider in Watsonville, CA specializing in cardiovascular disease (cardiology). Mark trained at Illinois Medical College, graduating in 1989. Mark is also listed as specializing in interventional cardiology. According to Medicare claims data, Mark cared for 4,334 Medicare patients across 10,419 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (831) 768-0220
- Email not available
Practice Locations
30 BRENNAN ST
Watsonville, CA 95076
Procedures Most Often Billed to Medicare
10,419 services · 4,334 patients · 25 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
1,050 |
| Nuclear medicine studies of heart muscle at rest and with stress and spect | Imaging | 78452 |
113 |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | Treatment | 93306 |
350 |
| Ultrasound of both sides of head and neck blood flow | Treatment | 93880 |
210 |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
180 |
| Ultrasound study of arm or leg veins with compression and maneuvers | Treatment | 93970 |
132 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) | Treatment | 93017 |
117 |
| Ultrasound of leg arteries or artery grafts | Treatment | 93925 |
109 |
| Injection, regadenoson, 0.1 mg | Drug given | J2785 |
352 |
| Technetium tc-99m tetrofosmin, diagnostic, per study dose | A9502 |
246 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at Illinois Medical College 4
Other providers in the same specialty who trained at the same institution.
Class of 1989 at Illinois Medical College 8
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Byrne?
Dr. Byrne is a cardiovascular disease (cardiology) in Watsonville, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “CARDIOVASCULAR DISEASE (CARDIOLOGY)”.
NPI registry
What is Dr. Byrne's address?
Dr. Byrne is listed at 30 BRENNAN ST, Watsonville, CA 95076. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Byrne?
The number on file is (831) 768-0220. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Byrne's NPI number?
Dr. Byrne's National Provider Identifier is 1962411272. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Byrne train?
Dr. Byrne attended Illinois Medical College, graduating in 1989. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Byrne been practicing?
Dr. Byrne has 37 years experience. Calculated from a graduation year of 1989, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Byrne perform?
According to Medicare billing data, Dr. Byrne performs procedures including insertion of needle into vein for collection of blood sample; reads or performs imaging such as nuclear medicine studies of heart muscle at rest and with stress and spect; provides treatments such as ultrasound of heart with color-depicted blood flow, rate, direction and valve function and ultrasound of both sides of head and neck blood flow, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Byrne confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Byrne. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.