Marilyn Barbara Mayer, MD
NPI 1205818853ActiveIndividual· Internal Medicine· Cypress, TX
Internal Medicine (MD) in Cypress, Texas, trained at University of Texas Medical School at Houston (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $384,101 for 4,524 claims, against $98,802 paid for services in 2024. Lilly USA, LLC was the largest of 9 companies reporting payments in 2025, $225.82 in all, mostly food and beverage.
Overview
| NPI | 1205818853 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 18, 2005 |
| Last updated in NPPES | Jun 26, 2025 |
| Certified by provider | Jun 26, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | J2191 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 253 |
|---|---|
| Services billed | 1,194 across 29 procedure codes |
| Paid by Medicare | $98,802 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,524 · 10,931 30-day fills |
|---|---|
| Patients | 346 |
| Total drug cost | $384,101 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of Texas Medical School at Houston |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Internal Medicine |
Medical group
- North Cypress Medical Partners IncHouston, TX · 5 clinicians
Hospital affiliations
- HCA Houston Healthcare KingwoodKingwood, TX
- HCA Houston Healthcare TomballTomball, TX
- Houston Methodist Willowbrook HospitalHouston, TX
- Memorial Hermann - Texas Medical CenterHouston, TX
- Memorial Hermann Memorial City HospitalHouston, TX
Other facilities
- Enhabit Home HealthHome health agency · Houston, TX
- Phoenix Healthcare Services, IncHome health agency · Houston, TX
- Select Care Home Health, Inc.Home health agency · Cypress, TX
Industry payments (Open Payments)
- 2025$225.82 · 11 payments from 9 companies
- 2024$85.46 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $39.53 | 2 |
| Exact Sciences Corporation | $32.20 | 2 |
| Optinose US, Inc. | $27.45 | 1 |
| Inspire Medical Systems, Inc. | $24.56 | 1 |
| Glaxosmithkline, LLC. | $22.47 | 1 |
What the 2025 payments were for
- Food and Beverage$225.82 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 67 internal medicine physicians in Cypress · All internal medicine physicians in Texas