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DR. ANDREW G MAYER MD
NPI 1215949201
Internal Medicine - Gastroenterology in La Jolla, CA

Active since August 12, 2006PECOS EnrolledAccepts Medicare Assignment
9850 GENESEE AVE, #820, LA JOLLA, CA 92037(858) 453-5200(858) 453-4589 Get Directions Write a Review

NPPES record last updated: July 31, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Andrew G Mayer Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ANDREW G MAYER MD (NPI 1215949201) is an individual gastroenterology provider in La Jolla, California, licensed in California (A77759) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of State University Of New York At Buffalo School Of Medicine (2000).

NPPES Registry Identity

NPI1215949201
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. ANDREW G MAYERCredential: MD
Location Address9850 GENESEE AVE, #820La Jolla, CA 92037-1224
Mailing Address9850 Genesee Ave, #820La Jolla, CA 92037-1224 · (858) 453-5200 · Fax (858) 453-4589
Phone(858) 453-5200
Fax(858) 453-4589
Sole ProprietorNo
Medical School CMSState University Of New York At Buffalo School Of MedicineGraduated 2000
Enumeration DateAugust 12, 2006
Last NPPES UpdateJuly 31, 2007
✔ NPI 1215949201 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Licenses✔ Licensed in CA · A77759✔ Licensed in AZ · 35693
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
9850 GENESEE AVE, La Jolla, CA 92037
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Andrew G Mayer Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6103825526
PECOS Enrollment IDI20071017000889
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 11

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
152 services152 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
85 services75 patients
Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
76 services76 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
75 services75 patients
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235
This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.
52 services51 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
48 services48 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92037 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$140.22 typical visit price
range $62.10 – $184.71
Typical copayment $35.05 (range $15.52 – $46.17)
Most-billed visit code 99204
Established Patient
$108.42 typical visit price
range $20.62 – $151.42
Typical copayment $27.10 (range $5.15 – $37.85)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SUHAIR S. ERIKAT MFT
Marriage & Family Therapist
9850 GENESEE AVE, SUITE 970
LA JOLLA, CA 92037
San Diego County (858) 558-2731
DR. MARK C ADRIAN M.D.
Internal Medicine
9850 GENESEE AVE, SUITE 355
LA JOLLA, CA 92037
San Diego County (858) 202-0011
RICHARD A.K. CHAFFOO, A PROFESSIONAL CORPORATION
Plastic Surgery
9850 GENESEE AVE, SUITE 330
LA JOLLA, CA 92037
San Diego County (858) 623-6333
MRS. KATHLEEN DYKES YOUNG MS
Clinical Exercise Physiologist
9850 GENESEE AVE, SUITE 730
LA JOLLA, CA 92037
San Diego County (858) 847-5064
YEVHENIYA KHROBUST FNP
Nurse Practitioner (Family)
9850 GENESEE AVE
LA JOLLA, CA 92037
San Diego County (858) 554-9100
DR. PAMILA K. BRAR M.D.
Internal Medicine
9850 GENESEE AVE, STE 570
LA JOLLA, CA 92037
San Diego County (858) 200-3007
PRIMA PRIMARY MEDICAL ASSOCIATION, INC
Internal Medicine
9850 GENESEE AVE, SUITE 355
LA JOLLA, CA 92037
San Diego County (858) 202-0011
MAHMOOD MAHDAVI M.D.
Otolaryngology
9850 GENESEE AVE, STE 710
LA JOLLA, CA 92037
San Diego County (858) 458-9955

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Andrew Mayer's NPI number?

The NPI number for Andrew Mayer is 1215949201. It was assigned to this individual provider in the NPPES registry on August 12, 2006.

Where is Andrew Mayer located?

Andrew Mayer practices at 9850 Genesee Ave #820, La Jolla, CA 92037. The listed phone number is (858) 453-5200.

What is Andrew Mayer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Andrew Mayer enrolled in Medicare?

Yes. Andrew Mayer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Andrew Mayer was last updated on July 31, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.