Frank Mayer, M.D.
NPI 1598760589 · Gastroenterology Physician · La Jolla, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frank Mayer, M.D. is a Gastroenterology Physician provider in La Jolla, CA (NPI 1598760589).
Provider details
- NPI number
- 1598760589
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G40234 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
21 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,005 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 355 | $97 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 180 | $119 |
| 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 MonitoG0500 | 82 | $5 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 61 | $110 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 59 | $137 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 103 | 100 |
| Pantoprazole Sodium | 34 | 11 |
| Magnesium Sulfate | 26 | — |
| Esomeprazole Magnesium | 23 | — |
| Lipase/Protease/Amylasebrand: Creon | 21 | — |
| Amitriptyline Hcl | 19 | — |
| Dicyclomine Hcl | 18 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-16
- Last updated
- 2009-06-19
Frequently asked questions
- What is Frank Mayer's NPI number?
- Frank Mayer's National Provider Identifier (NPI) is 1598760589, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frank Mayer's specialty?
- Frank Mayer is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Frank Mayer located?
- Frank Mayer's practice location on file with NPPES is 9850 Genesee Ave, La Jolla, CA 92037-1229.
- What is Frank Mayer's phone number?
- The practice phone number listed in the NPPES registry for Frank Mayer is (858) 457-3737.
- Does Frank Mayer accept Medicare?
- Frank Mayer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frank Mayer's NPI active?
- Yes — Frank Mayer's NPI (1598760589) is active in the NPPES registry as of the last update on 2009-06-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.