Diana Aluyen, MD
NPI 1801230487 · Hospitalist Physician · Castroville, TX
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Aluyen, MD is a Hospitalist Physician provider in Castroville, TX (NPI 1801230487).
Provider details
- NPI number
- 1801230487
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- Q7826 (TX)
Specialties & taxonomies
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
13 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
930 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 404 | $74 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 317 | $112 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 120 | $108 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 61 | $163 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 28 | $124 |
Typical Medicare-allowed amounts for these services range $74–$163 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 30 | 30 |
| Ondansetronbrand: Ondansetron Odt | 21 | 20 |
| Cefdinir | 19 | 19 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 15 | 15 |
| Ciprofloxacin Hcl | 14 | 14 |
| Ondansetron Hcl | 14 | 14 |
| Tramadol Hcl | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-04-25
- Last updated
- 2016-06-28
Frequently asked questions
- What is Diana Aluyen's NPI number?
- Diana Aluyen's National Provider Identifier (NPI) is 1801230487, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Aluyen's specialty?
- Diana Aluyen is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Diana Aluyen located?
- Diana Aluyen's practice location on file with NPPES is 1051 US Highway 90 E, Castroville, TX 78009-5210.
- What is Diana Aluyen's phone number?
- The practice phone number listed in the NPPES registry for Diana Aluyen is (830) 931-3336.
- Does Diana Aluyen accept Medicare?
- Diana Aluyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Aluyen's NPI active?
- Yes — Diana Aluyen's NPI (1801230487) is active in the NPPES registry as of the last update on 2016-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.