Are you Dr. Vierra? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 2 Upper Ragsdale Dr, B230, Monterey, CA 93940
About Dr. Vierra
Mark A. Vierra, MD practices surgery in Monterey, CA. Mark is a 1985 graduate of Harvard Medical School. According to Medicare claims data, Mark cared for 583 Medicare patients across 722 services. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and new patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more. The provider's National Provider Identifier (NPI) is 1295706448.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (831) 649-0808
- Email not available
Practice Locations
2 UPPER RAGSDALE DR B230
Monterey, CA 93940
Conditions Commonly Evaluated or Treated
Within Surgery (Unspecified) generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Breast conditions
Cancer
- Colon cancer
- Esophageal cancer
- Liver cancer
- Neuroendocrine Tumors
- Pancreatic cancer
- Soft-tissue sarcoma
- Stomach cancer
- Thyroid cancer
Colorectal
Digestive
- Abdominal adhesions
- Acid reflux
- Acute pancreatitis
- Bowel obstruction
- Colon polyps
- Diverticulitis
- Gastroparesis
- Peptic ulcer disease
Digestive & blood
Digestive health
- Crohn's disease
- Fecal incontinence
- Perforated bowel
- Severe chronic constipation
- Swallowing difficulties
- Ulcerative colitis
Endocrine
Infections
Lumps & bumps
Lymphatic
Minor surgery
Skin & scars
Skin & soft tissue
Skin cancer
Vascular
Weight & metabolism
Wound care
Wounds
Procedures & services
Most searched procedures
Abdominal
Abdominal surgery
Bariatric
Breast surgery
Cancer
Cancer surgery
Colorectal
- Anal fistula surgery
- Anal Sphincter Repair
- Colon resection
- Hemorrhoid removal
- Ostomy reversal
- Ostomy surgery
- Rectal prolapse repair
- Surgery for chronic anal fissure
Consultations
Diagnostic
Digestive
Digestive health
Endocrine
Infections
Minor surgery
Post-op care
Reconstruction
Skin & soft tissue
- Cyst Removal
- Lipoma removal
- Mole removal
- Pilonidal cyst surgery
- Scar revision surgery
- Skin Tag Removal
Skin cancer
Vascular
Vascular & cancer
Weight loss
Wound care
Wounds
Procedures Most Often Billed to Medicare
722 services · 583 patients · 14 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of gallbladder with x-ray study of bile ducts using an endoscope | Procedure | 47563 |
16 | As often as other peers in Surgery |
| Repair of hernia of muscle at esophagus and stomach with implantation of mesh using an endoscope | Procedure | 43282 |
16 | As often as other peers in Surgery |
| Repair of groin hernia (5 years or older) | Procedure | 49505 |
14 | As often as other peers in Surgery |
| Review by radiologist of bile and/or pancreatic duct image during surgery | Imaging | 74300 |
13 | As often as other peers in Surgery |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
162 | More than most peers in Surgery |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
123 | More than most peers in Surgery |
| 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 | More than most peers in Surgery |
| 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 | More often than most peers in Surgery |
| 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 | More often than most peers in Surgery |
| 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 | More often than most peers in Surgery |
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 6
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 29 related providers in 4 groups
Other general surgeons in Monterey 5
Same specialty, same city.
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. That is the designation recorded for this NPI in the federal registry, where it is listed as “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. Contact the office directly to confirm availability and scheduling.
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
Guide.md listings do not constitute medical advice or an endorsement.