Alexander Villareal, M.D.
NPI 1609094457 · Sleep Medicine (Internal Medicine) Physician · La Crosse, WI
Enrolled with Medicare as Practitioner - Sleep Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Villareal, M.D. is a Sleep Medicine (Internal Medicine) Physician provider in La Crosse, WI (NPI 1609094457).
Provider details
- NPI number
- 1609094457
- Entity type
- Individual
- Primary specialty
- Sleep Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD431468 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,166 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 422 | $15 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 290 | $61 |
| Sleep Study Including Heart Rate, Breathing, and Sleep Time95800 | 128 | $37 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 86 | $89 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 76 | $74 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Methylphenidate Hcl | 50 |
| Gabapentin | 36 |
| Clonazepam | 34 |
| Modafinil | 29 |
| Armodafinil | 29 |
| Solriamfetol Hclbrand: Sunosi | 25 |
| Temazepam | 18 |
| Pramipexole Di-Hclbrand: Pramipexole Dihydrochloride | 16 |
| Dextroamphetamine/Amphetaminebrand: Dextroamphetamine-Amphetamine |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-24
- Last updated
- 2016-04-29
Frequently asked questions
- What is Alexander Villareal's NPI number?
- Alexander Villareal's National Provider Identifier (NPI) is 1609094457, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Villareal's specialty?
- Alexander Villareal is listed in the NPPES registry with a primary specialty of Sleep Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Villareal located?
- Alexander Villareal's practice location on file with NPPES is 1836 South Ave, La Crosse, WI 54601-5429.
- What is Alexander Villareal's phone number?
- The practice phone number listed in the NPPES registry for Alexander Villareal is (608) 782-7300.
- Does Alexander Villareal accept Medicare?
- Alexander Villareal is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Villareal's NPI active?
- Yes — Alexander Villareal's NPI (1609094457) is active in the NPPES registry as of the last update on 2016-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.