FRANK EDWARD MAYER M.D.
NPI 1598760589
Internal Medicine - Gastroenterology in La Jolla, CA

Q: What is Frank Mayer's NPI number?

The NPI number for Frank Mayer is 1598760589. It was assigned to this individual provider in the NPPES registry on June 16, 2005.

Q: What is Frank Mayer's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Frank Mayer was last updated on June 19, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.

Active since June 16, 2005PECOS EnrolledAccepts Medicare Assignment

9850 GENESEE AVE, STE 930, LA JOLLA, CA 92037(858) 457-3737(858) 550-9047 Get Directions Write a Review

NPPES record last updated: June 19, 2009. Verified against the NPPES registry weekly; last sync: November 08, 2026.

On this page

About Frank Edward Mayer M.d. NPPES

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

FRANK EDWARD MAYER M.D. (NPI 1598760589) is an individual gastroenterology provider in La Jolla, California, licensed in California (G40234) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS and is a graduate of University Of Kansas School Of Med (kc/wich/sal) (1978).

NPPES Registry Identity

NPI1598760589

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameFRANK EDWARD MAYERCredential: M.D.

Location Address9850 GENESEE AVE, STE 930La Jolla, CA 92037-1229

Mailing Address9850 Genesee Ave, Ste 930La Jolla, CA 92037-1229 · (858) 457-3737 · Fax (858) 550-9047

Phone(858) 457-3737

Fax(858) 550-9047

Sole ProprietorNo

Medical School CMSUniversity Of Kansas School Of Med (kc/wich/sal)Graduated 1978

Enumeration DateJune 16, 2005

Last NPPES UpdateJune 19, 2009

✔ NPI 1598760589 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in CA · G40234

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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Other Identifiers 3

Medicaid00G402340CA

Medicare UPINA48150CA

Medicare ID-Type UnspecifiedG40234CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Frank Edward Mayer M.d. 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 ID2365513421

PECOS Enrollment IDI20080617000311

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.

Medicare Billing Reassignment

Medicare enrollment records show Frank Mayer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Frank E. Mayer, M.D., A Professional Corporation

Same address

Gastroenterology

9850 GENESEE AVE, SUITE 560
La Jolla, CA 92037

Reassigned Medicare billing, California enrollment

NPI 1841465499 (858) 457-3737

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 15

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.

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.

355 services240 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.

180 services180 patients

Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito G0500

Moderate sedation is a method where a physician uses medication to help you relax during a gastrointestinal endoscopy. An independent trained observer will be present to monitor your vital signs and ensure your safety throughout the procedure. It's a common and safe practice.

82 services81 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.

61 services60 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

59 services56 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.

38 services38 patients

Telephone medical discussion with physician, 5-10 minutes 99441

A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.

36 services31 patients

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.

34 services34 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

34 services34 patients

Telephone medical discussion with physician, 11-20 minutes 99442

This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.

33 services31 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

23 services23 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

21 services21 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.

19 services19 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

17 services17 patients

Diagnostic exam of lower portion of large bowel using a flexible endoscope 45330

This procedure, known as a sigmoidoscopy, involves using a flexible tube with a camera to examine the lower part of your large bowel. It helps in identifying issues like inflammation, ulcers, or abnormal growths. It's a safe, minimally invasive procedure.

13 services12 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 Frank Mayer's NPI number?

The NPI number for Frank Mayer is 1598760589. It was assigned to this individual provider in the NPPES registry on June 16, 2005.

Where is Frank Mayer located?

Frank Mayer practices at 9850 Genesee Ave Ste 930, La Jolla, CA 92037. The listed phone number is (858) 457-3737.

What is Frank Mayer's specialty?

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

Is Frank Mayer enrolled in Medicare?

Yes. Frank 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.

Which organization bills Medicare for Frank Mayer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Frank Mayer reassigns Medicare benefits to Frank E. Mayer, M.D., A Professional Corporation (La Jolla, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Frank Mayer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Frank Mayer was last updated on June 19, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.