Alejandro Jaime Villalonga, MD
NPI 1538663257 · Internal Medicine Physician · The Woodlands, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alejandro Jaime Villalonga, MD is a Internal Medicine Physician provider in The Woodlands, TX (NPI 1538663257).
Provider details
- NPI number
- 1538663257
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- U4826 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
8 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
315 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 152 | $140 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 76 | $185 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 30 | $83 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 28 | $137 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 18 | $97 |
| Initial Hospital Care With Same-Day Admission and Discharge With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 70 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 75 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 228 | 96 |
| Amlodipine Besylate | 201 | 79 |
| Rosuvastatin Calcium | 134 | 59 |
| Losartan Potassium | 106 | 41 |
| Levothyroxine Sodium | 100 | 51 |
| Metoprolol Succinate | 92 | 33 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$202 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-03-19
- Last updated
- 2026-04-06
- Certified
- 2026-04-06
Frequently asked questions
- What is Alejandro Jaime Villalonga's NPI number?
- Alejandro Jaime Villalonga's National Provider Identifier (NPI) is 1538663257, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alejandro Jaime Villalonga's specialty?
- Alejandro Jaime Villalonga is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alejandro Jaime Villalonga located?
- Alejandro Jaime Villalonga's practice location on file with NPPES is 17201 I 45 S, The Woodlands, TX 77385-3311.
- What is Alejandro Jaime Villalonga's phone number?
- The practice phone number listed in the NPPES registry for Alejandro Jaime Villalonga is (936) 270-2000.
- Does Alejandro Jaime Villalonga accept Medicare?
- Alejandro Jaime Villalonga is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alejandro Jaime Villalonga's NPI active?
- Yes — Alejandro Jaime Villalonga's NPI (1538663257) is active in the NPPES registry as of the last update on 2026-04-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.