Dr. Everett H. Allen, MD
Rheumatology (Rheumatology Physician)
- Medicare participating
At a glance
- Years since graduation
- 30
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 830
Licensed in Texas since 2001, according to the Texas Medical Board. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Rheumatology Physician primary
TX license L1260 (first issued 2001; active)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Methodist Hospital San Antonio, TX
- Christus Santa Rosa Hospital-San Marcos San Marcos, TX
- Peterson Regional Medical Center Kerrville, TX
Medical groups
- Rheumatology Associates of South Texas, PLLC (16 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 830
- Services billed
- 229,136
- Patients’ average age
- 74
| Service | Times | Patients |
|---|---|---|
| Injection, golimumab, 1 mg, for intravenous use | 36,750 | 69 |
| Injection, certolizumab pegol, 1 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) | 36,000 | 20 |
| Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) | 26,025 | 74 |
| Injection, tocilizumab, 1 mg | 13,760 | 11 |
| Injection, romosozumab-aqqg, 1 mg | 12,810 | 11 |
| Injection, denosumab, 1 mg | 4,380 | 57 |
| Injection, infliximab, excludes biosimilar, 10 mg | 4,132 | 46 |
| Injection, rituximab, 10 mg | 2,461 | 16 |
| Injection, infliximab-abda, biosimilar, (renflexis), 10 mg | 2,340 | 22 |
| Hyaluronan or derivative, synvisc or synvisc-one, for intra-articular injection, 1 mg | 1,488 | 15 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Methotrexate (methotrexate sodium) Other prescribers in San Antonio, TX | 386 |
| Hydroxychloroquine Sulfate Other prescribers in San Antonio, TX | 309 |
| Prednisone Other prescribers in San Antonio, TX | 273 |
| Tramadol Hcl Other prescribers in San Antonio, TX | 128 |
| Duloxetine Hcl Other prescribers in San Antonio, TX | 126 |
| Alendronate Sodium Other prescribers in San Antonio, TX | 90 |
| Leflunomide Other prescribers in San Antonio, TX | 85 |
| Enbrel Sureclick (etanercept) Other prescribers in San Antonio, TX | 82 |
| Methotrexate Sodium (methotrexate sodium/pf) | 68 |
| Allopurinol Other prescribers in San Antonio, TX | 65 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 22 companies reported 168 payments worth $6,121 in total to this clinician.
| Invivyd Inc | $1,441 |
|---|---|
| Amgen Inc. | $689 |
| Janssen Biotech, Inc. | $678 |
| Novartis Pharmaceuticals Corporation | $573 |
| UCB, Inc. | $448 |
| GlaxoSmithKline, LLC. | $429 |
| E.r. Squibb & Sons, L.l.c. | $342 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $294 |
| Food and Beverage | $4,539 |
|---|---|
| Consulting Fee | $1,383 |
| Education | $199 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Invivyd Inc Oct 23, 2025 | Consulting Fee PEMGARDA · INFECTIOUS DISEASE | $1,383 |
| Janssen Biotech, Inc. May 8, 2025 | Education TREMFYA · Immunology · in-kind | $99.99 |
| Janssen Biotech, Inc. Dec 30, 2025 | Education TREMFYA · Immunology · in-kind | $99.00 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.