Dr. Gerald Thomas Mayer, MD
- Medicare services, 2020
- 125
- Part D claims, 2020
- 29
- Industry payments
- $118
- Affiliated sites
- 3
- Medical groups
- 2
- Practice address
- 520 Madison Oak Dr, San Antonio, TX 78258
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
North Central Baptist Hospital - HOPD
Acute Care Hospital outpatient department · San Antonio, Texas
Find Dr. Mayer's professional email, personal email and mobile number
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Dr. Gerald Thomas Mayer is a pediatrician in San Antonio, Texas
Dr. Mayer practices at North Central Baptist Hospital - HOPD in San Antonio, Texas.
Dr. Mayer's NPI, 1669415642, was assigned on June 14, 2006. Dr. Mayer graduated from LSU Health Sciences Center New Orleans - School of Medicine in 1965. Dr. Mayer holds Texas license J3154.
- NPI
- 1669415642NPI Registry (opens in a new tab)
- NPI enumeration date
- June 14, 2006
- NPI status
- Active
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1965
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gerald Thomas Mayer practices at North Central Baptist Hospital - HOPD in San Antonio, Texas
Dr. Mayer's primary practice is North Central Baptist Hospital - HOPD, at 520 Madison Oak Dr, San Antonio, TX 78258.
- North Central Baptist Hospital - HOPD520 Madison Oak Dr, San Antonio, TX 78258
Source: Dmand AI Affiliation Data
Dr. Gerald Thomas Mayer is affiliated with 3 sites of care and 2 medical groups
Dr. Mayer's primary practice is North Central Baptist Hospital - HOPD in San Antonio, Texas. The medical group on file is ACS Primary Care Physicians Southwest, PA. Dmand AI also links Dr. Mayer to 1 more clinical lab, 1 group practice or clinic and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gerald Thomas Mayer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mayer practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| North Central Baptist Hospital - HOPD | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gerald Thomas Mayer is one of 4,833 pediatricians in Texas
Pediatrics is Dr. Mayer's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. Mayer is board certified in pediatrics by the American Board of Pediatrics. Dmand AI has Dr. Mayer's licenses on file in 4 states: Texas, California, Illinois and Louisiana.
Specialties and state licenses
- Pediatrics, TexasPrimary
- California license
- Illinois license
- Louisiana license
Pediatricians near Dr. Mayer
Counts of pediatricians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gerald Thomas Mayer billed Medicare for 125 services in 2020
CMS data shows 125 Medicare services from Dr. Mayer across 4 procedure codes in 2020. Medicare paid $5,205 for them. Every service was in an office.
Dr. Mayer's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 3902020: 8877%
- Lab and pathology
- 2019: 762020: 2271%
- Tests and treatments
- 2019: 652020: 1577%
- Drugs given in the office
- 2019: 3382020: 0100%
- Imaging
- 2019: 282020: 0100%
- Surgery
- 2019: 122020: 0100%
Dr. Mayer compared with the Texas median for pediatricians, 2020
- Dr. Mayer
- Texas median
- Medicare services
- 125vs 6689% above
- Part D claims
- 29vs 142.1 times
Medians across 455 pediatricians in Texas with Dmand AI profiles that report each measure.
Dr. Mayer's most billed Medicare procedure codes, 2020
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mayer and other pediatricians in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gerald Thomas Mayer's patients have a median age of 24
Across all payers, Dmand AI patient panel data puts Dr. Mayer's median patient age at 24, with 63% women.
Dr. Mayer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 24
Patient panel by sex, all payers
- Women63%
- Men38%
Source: Dmand AI Patient Panel Data
Dr. Gerald Thomas Mayer wrote 29 Medicare Part D claims in 2020
In 2020, Dr. Mayer wrote 29 Medicare Part D claims. Every claim was for a generic drug. They cover 2 drugs, with $341 in total drug cost. In 2019, CMS named 132 claims across 6 drugs.
Dr. Mayer's most prescribed drugs by claims, 2020
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 1322020: 2978%
Drugs named by CMS: 2 in 2020, 6 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Gerald Thomas Mayer received $118 in industry payments from 2016 to 2020
CMS Open Payments shows 7 general payments to Dr. Mayer from 3 drug and device companies from 2016 to 2020. Food and beverage make up the largest share, 100% of the total. Lupin Pharmaceuticals, Inc paid the most, $59.
General payments to Dr. Mayer by program year, 2016 to 2020
Companies that paid Dr. Mayer the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gerald Thomas Mayer graduated from LSU Health Sciences Center New Orleans - School of Medicine
Dr. Mayer graduated from LSU Health Sciences Center New Orleans - School of Medicine in 1965.
- Medical school
- Board certified in pediatrics
Source: Dmand AI Professional Profile Data
Dr. Gerald Thomas Mayer accepts plans from 18 insurance carriers
Dr. Mayer is in network with 18 carriers, including Elevance, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Aetna
- HCSC
- Alliant Health Plans
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- +10 more carriersWith a free account
Plan types Dr. Mayer accepts, by number of carriers
- PPO12
- HMO9
- Medicare6
- POS5
- EPO3
Source: Dmand AI Insurance Network Data
Sources for Dr. Gerald Thomas Mayer's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gerald Thomas Mayer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gerald Thomas Mayer's NPI number?
Dr. Gerald Thomas Mayer's NPI number is 1669415642. It was assigned on June 14, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gerald Thomas Mayer?
Dr. Gerald Thomas Mayer is a pediatrician in San Antonio, Texas. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. Gerald Thomas Mayer practice?
Dr. Mayer practices at 520 Madison Oak Dr, San Antonio, TX 78258. Dr. Mayer's primary practice is North Central Baptist Hospital - HOPD in San Antonio, Texas. Dmand AI also links Dr. Mayer to 1 clinical lab, 1 group practice or clinic and 1 medical group.
What is Dr. Gerald Thomas Mayer's medical license number?
Dr. Mayer holds Texas license J3154, one of the licenses on file in 4 states.
Which states has Dr. Gerald Thomas Mayer been licensed in?
Dmand AI has state licenses on file for Dr. Mayer in Texas (1993 to 2026), California, Illinois (since 1966) and Louisiana (1965 to 2023).
What medical group is Dr. Gerald Thomas Mayer part of?
Dr. Mayer is linked to ACS Primary Care Physicians Southwest, PA. Dmand AI links Dr. Mayer to 1 more medical group.
Does Dr. Gerald Thomas Mayer accept Medicare?
Yes. CMS data shows Dr. Mayer billed Medicare for 125 services in 2020.
Is Dr. Gerald Thomas Mayer board certified?
Yes. Dr. Mayer is board certified in pediatrics by the American Board of Pediatrics.
What services does Dr. Gerald Thomas Mayer bill to Medicare?
In 2020, Dr. Mayer's most billed Medicare services were office visit, established patient (99214), lab and pathology test (87804) and infusion or chemotherapy administration (96372).
Where did Dr. Gerald Thomas Mayer go to medical school?
Dr. Mayer graduated from LSU Health Sciences Center New Orleans - School of Medicine in 1965.
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What drugs does Dr. Gerald Thomas Mayer prescribe most?
In 2020 Medicare Part D data, Dr. Mayer's most prescribed drugs by claims were Azithromycin and Cefdinir.
Has Dr. Gerald Thomas Mayer received payments from drug or device companies?
CMS Open Payments shows $118 in general payments to Dr. Mayer from 3 companies from 2016 to 2020. The largest total came from Lupin Pharmaceuticals, Inc.
How long has Dr. Gerald Thomas Mayer been practicing?
Dr. Mayer graduated from medical school in 1965, 61 years ago.
What insurance does Dr. Gerald Thomas Mayer accept?
Dr. Mayer is in network with 18 carriers, including Elevance, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.
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