Gustavo Diaz-Reyes, MD
NPI 1588652168 · Otolaryngology Physician · Kyle, TX
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gustavo Diaz-Reyes, MD is a Otolaryngology Physician provider in Kyle, TX (NPI 1588652168).
Provider details
- NPI number
- 1588652168
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 234797 (NY)
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
20 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
335 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 74 | $106 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 57 | $54 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 47 | $157 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 47 | $87 |
| Diagnostic Exam of Voice Box Using a Flexible Endoscope31575 | 38 | $122 |
| Removal of Impacted Ear Wax69210 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 30 | 19 |
| Fluticasone Propionate | 20 | — |
| Levothyroxine Sodium | 13 | — |
| Azelastine Hcl | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-08
- Last updated
- 2021-06-11
- Certified
- 2021-06-11
Frequently asked questions
- What is Gustavo Diaz-Reyes's NPI number?
- Gustavo Diaz-Reyes's National Provider Identifier (NPI) is 1588652168, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gustavo Diaz-Reyes's specialty?
- Gustavo Diaz-Reyes is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is Gustavo Diaz-Reyes located?
- Gustavo Diaz-Reyes's practice location on file with NPPES is 4100 Everett Dr, Kyle, TX 78640-6146.
- What is Gustavo Diaz-Reyes's phone number?
- The practice phone number listed in the NPPES registry for Gustavo Diaz-Reyes is (512) 295-1333.
- Does Gustavo Diaz-Reyes accept Medicare?
- Gustavo Diaz-Reyes is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gustavo Diaz-Reyes's NPI active?
- Yes — Gustavo Diaz-Reyes's NPI (1588652168) is active in the NPPES registry as of the last update on 2021-06-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.