Quick answers
- Does Alejandro Jaime Villalonga accept Medicare assignment?
- Yes. Medicare's clinician data says Alejandro Jaime Villalonga 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 Alejandro Jaime Villalonga see?
- In 2024, CMS data shows 314 Original Medicare patients and 345 services for Alejandro Jaime Villalonga. This counts Original Medicare only and measures volume, not quality.
- What is Alejandro Jaime Villalonga's NPI number?
- 1538663257. 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 Alejandro Jaime Villalonga, 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 | 314 |
|---|---|
| Services billed to Medicare | 345 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)152 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)76 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)30 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)28 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)18 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%
- Arthritis54%
- Anxiety44%
- Ischemic heart disease43%
- Depression40%
Hospitals where Alejandro Jaime Villalonga works
Medicare's Facility Affiliation Data lists Alejandro Jaime Villalonga 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.
- Danbury HospitalDanbury, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070033
- Griffin HospitalDerby, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070031
- Houston Methodist The Woodlands HospitalThe Woodlands, TX · Acute Care Hospital · Medicare rating: 5 of 5 stars · CCN 670122
- Putnam Hospital CenterCarmel, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330273
Practice locations
Addresses where Alejandro Jaime Villalonga is enrolled with Medicare (CMS data updated October 2, 2026).
- 16811 Southwest Fwy, Suite 200Sugar Land, TX 77479 (281) 690‑4678
- 1931 Black Rock TpkeFairfield, CT 06825 (203) 384‑8681
Group practices
Medicare enrollment lists Alejandro Jaime Villalonga as a member of these groups (CMS data updated October 2, 2026).
- Houston Methodist Specialty Physicians1,528 clinicians in the group
- Rehabilitation Associates Inc529 clinicians in the group
Specialties
- Hospitalistprimary
Other hospitalists in Sugar Land
Clinicians with the same Medicare primary specialty in Sugar Land, TX — not a recommendation.
Other clinicians in Houston Methodist Specialty Physicians
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538663257 |
| 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