Physician Profile
Unclaimed ProfileAbout VIERRA
Mark A Vierra, MD practices general surgery in Monterey, CA. Mark is a 1985 graduate of Harvard Medical School. Mark is also listed as specializing in surgery. According to Medicare claims data, Mark cared for 583 Medicare patients across 722 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) 649-0808
- Email not available
Practice Locations
2 UPPER RAGSDALE DR B230
Monterey, CA 93940
Procedures Most Often Billed to Medicare
722 services · 583 patients · 14 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of gallbladder with x-ray study of bile ducts using an endoscope | Procedure | 47563 |
16 |
| Repair of hernia of muscle at esophagus and stomach with implantation of mesh using an endoscope | Procedure | 43282 |
16 |
| Repair of groin hernia (5 years or older) | Procedure | 49505 |
14 |
| Review by radiologist of bile and/or pancreatic duct image during surgery | Imaging | 74300 |
13 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
162 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
123 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
88 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | Office visit | 99231 |
70 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
62 |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
53 |
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.
Other general surgeons at this location 3
Same specialty, same street address — most likely the same department or group.
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.
Other general surgeons in Monterey 3
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Harvard Medical School 8
Other providers in the same specialty who trained at the same institution.
Class of 1985 at Harvard Medical School 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of gallbladder with x-ray study of bile ducts using an endoscope 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Vierra specialize in?
Dr. Vierra is a general surgeon in Monterey, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GENERAL SURGERY”.
NPI registry
Where is Dr. Vierra located?
Dr. Vierra is listed at 2 UPPER RAGSDALE DR B230, Monterey, CA 93940. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Vierra's phone number?
The number on file is (831) 649-0808. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Vierra's NPI number?
Dr. Vierra's National Provider Identifier is 1295706448. 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. Vierra go to medical school?
Dr. Vierra attended Harvard Medical School, graduating in 1985. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Vierra been practicing?
Dr. Vierra has 41 years experience. Calculated from a graduation year of 1985, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Vierra do most often?
According to Medicare billing data, Dr. Vierra performs procedures including removal of gallbladder with x-ray study of bile ducts using an endoscope, repair of hernia of muscle at esophagus and stomach with implantation of mesh using an endoscope and repair of groin hernia; reads or performs imaging such as review by radiologist of bile and/or pancreatic duct image during surgery, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Vierra confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Vierra. If this is you, claiming it is free.
Guide.md
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.