Dr. Emily Marx, M.D.
What this data tells you about Dr. Marx
Dr. Emily Marx is an internal medicine specialist in San Antonio, TX, with 18 years of NPI registration. Based on federal Medicare data, Dr. Marx performed 124,631 Medicare services across 4,064 unique beneficiaries.
Between the years covered by Open Payments, Dr. Marx received a total of $14,203 from 43 pharmaceutical and/or device companies across 798 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in internal medicine. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Marx is Very High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
Medicare Practice Summary
Medicare Utilization ↗Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Certolizumab injection (Cimzia) | 35,000 | $4 | $19 |
| Golimumab infusion (Simponi Aria) | 30,695 | $11 | $48 |
| Abatacept infusion (Orencia) | 17,025 | $33 | $134 |
| Tocilizumab injection (Actemra) | 13,427 | $4 | $17 |
| Romosozumab injection (Evenity) for osteoporosis | 8,400 | $8 | $28 |
| Infliximab infusion (Remicade) | 4,045 | $26 | $114 |
| Injection, infliximab-abda, biosimilar, (renflexis), 10 mg | 3,400 | $31 | $119 |
| Denosumab injection (Prolia/Xgeva) | 2,400 | $18 | $42 |
| Joint lubricant injection (Synvisc) | 1,536 | $7 | $25 |
| Office visit, established patient (30-39 min) | 1,031 | $89 | $253 |
| Comprehensive metabolic blood panel | 1,003 | $10 | $26 |
| Complete blood count (CBC) with differential | 966 | $8 | $20 |
| C-reactive protein test (inflammation marker) | 887 | $5 | $14 |
| Sed rate test (inflammation marker) | 700 | $3 | $6 |
| Measurement of antibody for assessment of autoimmune disorder, any method | 656 | $17 | $44 |
| Administration of chemotherapy into vein, 1 hour or less | 624 | $99 | $399 |
| Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle | 279 | $55 | $222 |
| Administration of chemotherapy into vein, each additional hour | 177 | $21 | $85 |
| Analysis of substance using immunoassay technique, multiple step method | 152 | $11 | $28 |
| Injection, methylprednisolone acetate, 40 mg | 143 | $6 | $15 |
| Cardiolipin antibody (tissue antibody) measurement | 132 | $25 | $63 |
| Measurement of complement (immune system proteins), antigen, | 128 | $12 | $29 |
| Vitamin D level test | 124 | $29 | $72 |
| Beta 2 glycoprotein 1 antibody (autoantibody) measurement | 123 | $25 | $63 |
| Measurement of dna antibody, native or double stranded | 117 | $13 | $35 |
| Measurement of dna antibody, single stranded | 117 | $12 | $29 |
| Screening test for autoimmune disorder | 116 | $12 | $29 |
| Vitamin B-12 level test | 99 | $15 | $38 |
| Aspiration and/or injection of fluid large joint using ultrasound guidance | 98 | $89 | $273 |
| Measurement of antibody for rheumatoid arthritis assessment | 83 | $13 | $32 |
| Uric acid level test | 82 | $4 | $12 |
| Rheumatoid factor level | 81 | $6 | $15 |
| Measurement of substance using immunoassay technique | 80 | $17 | $39 |
| Injection, methylprednisolone acetate, 80 mg | 77 | $9 | $28 |
| Injection, methylprednisolone sodium succinate, up to 40 mg | 71 | $3 | $13 |
| Injection of additional new drug or substance into vein | 59 | $12 | $47 |
| Flu vaccine administration | 54 | $30 | $61 |
| Office visit, established patient, complex (40-54 min) | 53 | $138 | $331 |
| Office visit, established patient (20-29 min) | 48 | $61 | $166 |
| Joint injection, major joint | 47 | $50 | $128 |
| Drug injection, under skin or into muscle | 46 | $10 | $42 |
| Flu vaccine, quadrivalent | 45 | $74 | $75 |
| Injection, methylprednisolone acetate, 20 mg | 42 | $3 | $4 |
| Iron binding capacity test | 41 | $8 | $22 |
| Ferritin level test (iron stores) | 38 | $13 | $35 |
| New patient office visit (45-59 min) | 36 | $124 | $497 |
| Creatine kinase (cardiac enzyme) level, total | 20 | $6 | $17 |
| Aspiration and/or injection of fluid from small joint | 17 | $41 | $96 |
| Injection into tendon or ligament | 11 | $45 | $116 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
Associated products mentioned in payments ›
Most payments (99%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 6% for internal medicine in TX.
Geographic Context
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Marx is a mixed practice specialist, with above-average Medicare volume (top 0% in TX), with low-engagement industry engagement in the top 6% of TX peers, with 18 years of NPI registration.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
Is Dr. Marx experienced with certolizumab injection (cimzia)?
Does Dr. Marx receive payments from pharmaceutical companies?
How do Dr. Marx's costs compare to other internal medicine physicians in San Antonio?
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All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. The Transparency Score measures data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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