Quick answers
- Does Marcos A. Aquino accept Medicare assignment?
- Yes. Medicare's clinician data says Marcos A. Aquino 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 Marcos A. Aquino see?
- In 2024, CMS data shows 65 Original Medicare patients and 945 services for Marcos A. Aquino. This counts Original Medicare only and measures volume, not quality.
- What is Marcos A. Aquino's NPI number?
- 1871561308. 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 Marcos A. Aquino, 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 | 65 |
|---|---|
| Services billed to Medicare | 945 |
| Different services or procedures | 36 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)208 services
- Injection, ceftriaxone sodium, per 250 mg (J0696)108 services
- Injection of drug or substance under skin or into muscle (96372)86 services
- Blood glucose (sugar) level after receiving dose of glucose (82950)72 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)52 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 cholesterol68%
- Diabetes52%
- Arthritis48%
- Ischemic heart disease29%
- Anxiety22%
Practice locations
Addresses where Marcos A. Aquino is enrolled with Medicare (CMS data updated October 2, 2026).
- 3331 Fairview StPasadena, TX 77504 (713) 943‑1640
Specialties
- Internal Medicineprimary
- Endocrinologyalso
Other internal medicine doctors in Pasadena
Clinicians with the same Medicare primary specialty in Pasadena, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1966 (60 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) | 1871561308 |
| 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
- 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