Skip to main content

Dr. Grayson Smith, MD

Internal Medicine (Internal Medicine Physician)

  • Medicare participating

At a glance

Years since graduation
40
In the NPI registry since
2006
Medicare patients seen, 2024
316

Licensed in Texas since 1987, 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

  • 1986Medical school: University of Texas Medical School at Houston
  • 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier

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

  • Internal Medicine Physician primary
    TX license H2792 (first issued 1987; active)

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Internal Medicine per capita by county →

Where they work

Hospitals

Medical groups

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
316
Services billed
2,106
Patients’ average age
78
Most frequent Medicare services, 2023
ServiceTimesPatients
Established patient office or other outpatient visit, 30-39 minutes722289
Insertion of needle into vein for collection of blood sample551277
Established patient office or other outpatient visit, 20-29 minutes223141
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit161161
Hemoglobin a1c level16185
Influenza vaccine split virus, preservative free6060
Administration of influenza virus vaccine6060
Established patient office or other outpatient visit, 40-54 minutes2218
Urinalysis, manual test2116
Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a2011

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

Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.

Other Internal Medicine clinicians in San Marcos

Sources

NPI registry (CMS NPPES, November 2026; record last updated November 19, 2009), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1740224567. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.