Grethel Ruiz, M.D.
NPI 1477756229 · Family Medicine Physician · Houston, TX
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grethel Ruiz, M.D. is a Family Medicine Physician provider in Houston, TX (NPI 1477756229).
Provider details
- NPI number
- 1477756229
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- P2439 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 72 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 397 | 169 |
| Rosuvastatin Calcium | 243 | 95 |
| Metformin Hcl | 208 | 94 |
| Losartan Potassium | 204 | 76 |
| Amlodipine Besylate | 203 | 88 |
| Lisinopril | 197 | 88 |
| Levothyroxine Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$142 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
- 2007-06-08
- Last updated
- 2026-03-30
- Certified
- 2026-03-30
Frequently asked questions
- What is Grethel Ruiz's NPI number?
- Grethel Ruiz's National Provider Identifier (NPI) is 1477756229, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grethel Ruiz's specialty?
- Grethel Ruiz is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Grethel Ruiz located?
- Grethel Ruiz's practice location on file with NPPES is 545 Gulfgate Center Mall, Houston, TX 77087-3023.
- What is Grethel Ruiz's phone number?
- The practice phone number listed in the NPPES registry for Grethel Ruiz is (281) 846-7209.
- Does Grethel Ruiz accept Medicare?
- Grethel Ruiz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grethel Ruiz's NPI active?
- Yes — Grethel Ruiz's NPI (1477756229) is active in the NPPES registry as of the last update on 2026-03-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.