Guillermo Guardia Gonzales, MD
NPI 1902866387 · Endocrinology, Diabetes & Metabolism Physician · Toledo, OH
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guillermo Guardia Gonzales, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Toledo, OH (NPI 1902866387).
Provider details
- NPI number
- 1902866387
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 35095361 (OH)
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
20 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
1,888 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 662 | $115 |
| Hemoglobin A1c Level83036 | 404 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 213 | $83 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 212 | $3 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 184 | $31 |
| Ultrasound Scan of Head and Neck Soft Tissue76536 | 118 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 76 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 874 | 233 |
| Tirzepatidebrand: Mounjaro | 454 | 108 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 320 | 97 |
| Semaglutidebrand: Ozempic | 316 | 68 |
| Metformin Hcl | 304 | 79 |
| Metformin Hclbrand: Metformin Hcl Er | 212 | 62 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$34 across 2 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
- 2006-03-28
- Last updated
- 2023-11-03
Frequently asked questions
- What is Guillermo Guardia Gonzales's NPI number?
- Guillermo Guardia Gonzales's National Provider Identifier (NPI) is 1902866387, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guillermo Guardia Gonzales's specialty?
- Guillermo Guardia Gonzales is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Guillermo Guardia Gonzales located?
- Guillermo Guardia Gonzales's practice location on file with NPPES is 2100 W Central Ave, Toledo, OH 43606-3834.
- What is Guillermo Guardia Gonzales's phone number?
- The practice phone number listed in the NPPES registry for Guillermo Guardia Gonzales is (419) 537-5111.
- Does Guillermo Guardia Gonzales accept Medicare?
- Guillermo Guardia Gonzales is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Guillermo Guardia Gonzales's NPI active?
- Yes — Guillermo Guardia Gonzales's NPI (1902866387) is active in the NPPES registry as of the last update on 2023-11-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.