Quick answers
- Does Marco A. De Los Santos accept Medicare assignment?
- Yes. Medicare's clinician data says Marco A. De Los Santos accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Marco A. De Los Santos see?
- In 2024, CMS data shows 1,148 Original Medicare patients and 2,932 services for Marco A. De Los Santos. This counts Original Medicare only and measures volume, not quality.
- What is Marco A. De Los Santos's NPI number?
- 1932390119. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Marco A. De Los Santos, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 1,148 |
|---|---|
| Services billed to Medicare | 2,932 |
| Different services or procedures | 30 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)926 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)374 services
- Test to measure rate of airflow (94375)272 services
- Test to determine lung volumes using gas dilution or washout (94727)269 services
- Test to examine how well the lungs exchange gases (94729)269 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- COPD48%
- Ischemic heart disease42%
- Diabetes28%
Hospitals where Marco A. De Los Santos works
Medicare's Facility Affiliation Data lists Marco A. De Los Santos at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Fort Duncan Medical CenterEagle Pass, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450092
- Kimble HospitalJunction, TX · Critical Access Hospital · Emergency services: listed by Medicare · CCN 451306
- Methodist HospitalSan Antonio, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450388
- Methodist Hospital Hill CountryFredericksburg, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450604
- Peterson Regional Medical CenterKerrville, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450007
Practice locations
Addresses where Marco A. De Los Santos is enrolled with Medicare (CMS data updated October 2, 2026).
- 575 Hill Country Dr, Suite 101Kerrville, TX 78028 (830) 258‑7090
Group practices
Medicare enrollment lists Marco A. De Los Santos as a member of this group (CMS data updated October 2, 2026).
- Peterson Medical Associates191 clinicians in the group
Specialties
- Pulmonary Diseaseprimary
- Internal Medicinealso
Other pulmonologists in Texas
Clinicians with the same Medicare primary specialty in Texas — not a recommendation.
Other clinicians in Peterson Medical Associates
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 (19 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1932390119 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians