Dr. Gerald Thomas Mayer , MD
Pediatrics • San Antonio, TX
13022 Jones Maltsberger Rd
San Antonio, TX 782474219
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on June 14, 2006; this date does not establish years in practice.
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Published CMS data list 125 Original Medicare Part B services in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Published rows only; this is not a quality measure.
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Published Part B service records, 2020:
- 99214 — Established patient outpatient office visit: 77 service units.
- 87804 — Detection test by immunoassay with direct visual observation for influenza virus: 22 service units.
- 96372 — Injection of drug or substance under skin or into muscle: 15 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2019 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2020). CPT notice
See all 4 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 29 Medicare Part D prescriptions, including refills, in 2020.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020. Published rows only; this is not a quality measure.
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Published Part D records, 2020:
- Azithromycin — 18 prescription fills, including refills.
- Cefdinir — 11 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Medicare Part B services went from 1,182 in 2017 to 125 in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017–2020.
Practice Location & Contact Primary Location
13022 Jones Maltsberger Rd
San Antonio, TX 782474219
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in San Antonio, TX. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Pediatrics: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $10,372 in 2020
The total amount Medicare approved for these services in 2020. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020.
Paid by Medicare
About $5,205 in 2020
The part of the Medicare-allowed amount that Medicare itself paid in 2020, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020.
30-day fills
29 standardized 30-day fills in 2020
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$341 in 2020
The total cost of these prescriptions in 2020, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $13.53 in 2020
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2020.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Mayer has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Mayer as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in San Antonio and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Mayer are from 2020.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Mayer are from 2020.
462 active clinicians are listed under Pediatrics with a practice address in San Antonio, TX (5,642 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in San Antonio
0% of these 462 clinicians have the CMS telehealth indicator.
5.6% of these 462 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 89% from 1,182 in 2017 to 125 in 2020.
- 2017: 1,182
- 2018: 1,029
- 2019: 909
- 2020: 125
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Medicare-allowed amount
Medicare-allowed amount decreased 79% from $50,503 in 2017 to $10,372 in 2020.
- 2017: $50,503
- 2018: $56,199
- 2019: $44,662
- 2020: $10,372
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Paid by Medicare
Paid by Medicare decreased 85% from $34,806 in 2017 to $5,205 in 2020.
- 2017: $34,806
- 2018: $37,546
- 2019: $28,082
- 2020: $5,205
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 79% from 139 in 2016 to 29 in 2020.
- 2016: 139
- 2017: 154
- 2018: 145
- 2019: 132
- 2020: 29
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30-day fills
30-day fills decreased 80% from 143 in 2016 to 29 in 2020.
- 2016: 143
- 2017: 162
- 2018: 145
- 2019: 132
- 2020: 29
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Part D drug cost
Part D drug cost decreased 84% from $2,103 in 2016 to $341 in 2020.
- 2016: $2,103
- 2017: $2,100
- 2018: $1,867
- 2019: $1,394
- 2020: $341
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2020 only.
Sources: CMS Medicare Physician & Other Practitioners (2020), CMS Medicare Part D Prescribers (2020), CMS Open Payments (2020), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2020 (payments made January 1 – December 31, 2020): fewer than 11 records totaling $13.53.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Genentech, Inc. |
Food and Beverage
In-kind items and services
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Xofluza | General | $13.53 |
Source: CMS Open Payments, program year 2020, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2019 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2020; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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77 | 66 | $181.00 | $104.59 |
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87804
Detection test by immunoassay with direct visual observation for influenza virus
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22 | 11 | $62.00 | $16.22 |
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96372
Injection of drug or substance under skin or into muscle
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15 | 14 | $47.00 | $13.75 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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11 | 11 | $344.00 | $159.62 |
Source: CMS Part B by Provider and Service, 2020; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2020.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Azithromycin | Azithromycin | 18 | 105 | $116.22 | 17 |
| Cefdinir | Cefdinir | 11 | 98 | $224.61 | 11 |
Source: CMS Part D by Provider and Drug, 2020; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2023-05-24NUCC Taxonomy Code: 208000000X
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
NUCC Taxonomy Code: 207PP0204X
Pediatric Emergency Medicine is a clinical subspecialty that focuses on the care of the acutely ill or injured child in the setting of an emergency department.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PEDIATRIC MEDICINE
I20060619000170
TX
8123030954
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
20821 Us Highway 281 N Ste 324
San Antonio, TX 782587597
Phone: 2109984758
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 13022 JONES MALTSBERGER RD, SAN ANTONIO, TX 782474219 (Tel: 2104910772)
Registered at 13022 JONES MALTSBERGER RD, SAN ANTONIO, TX 782474219 (Tel: 2104910772)
NPI status registered as active in NPPES database
Registered at 19223 STONEHUE, SAN ANTONIO, TX 782583456 (Tel: 2104905911)
Registered at 25910 CHOCTAW TRL, SAN ANTONIO, TX 782605933 (Tel: 2108872329)
Recorded as GERALD MAYER, M.D.
Emergency Medicine (license number reported to NPPES: TX J3154)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Pediatrics Specialists in San Antonio
- Dr. Sharvari Parghi, MD
- Dr. Sergio Ramon, MD
- Dr. Joseph Elizondo, MD
- Dr. Cynthia Lopez, MD
- Dr. Jorge Garza, MD
- Dr. Adam Wolfe, MD, PhD
Mailing Address
13022 Jones Maltsberger Rd
San Antonio, TX 782474219
Phone: 2104910772