Luis Diaz, M.D.
NPI 1659346799 · Family Medicine Physician · The Woodlands, TX
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Luis Diaz, M.D. is a Family Medicine Physician provider in The Woodlands, TX (NPI 1659346799).
Provider details
- NPI number
- 1659346799
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- J8230 (TX)
Specialties & taxonomies
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
368 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 330 | $120 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 15 | $12 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 12 | $124 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 11 | $147 |
Typical Medicare-allowed amounts for these services range $12–$147 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 50 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 233 | 66 |
| Atorvastatin Calcium | 230 | 71 |
| Famotidine | 138 | 53 |
| Lisinopril | 112 | 28 |
| Amlodipine Besylate | 87 | 27 |
| Losartan Potassium | 77 | 25 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-22
- Last updated
- 2023-12-11
- Certified
- 2023-12-11
Frequently asked questions
- What is Luis Diaz's NPI number?
- Luis Diaz's National Provider Identifier (NPI) is 1659346799, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Luis Diaz's specialty?
- Luis Diaz is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Luis Diaz located?
- Luis Diaz's practice location on file with NPPES is 7901 Research Forest Dr, The Woodlands, TX 77382-1482.
- What is Luis Diaz's phone number?
- The practice phone number listed in the NPPES registry for Luis Diaz is (281) 296-5000.
- Does Luis Diaz accept Medicare?
- Luis Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Luis Diaz's NPI active?
- Yes — Luis Diaz's NPI (1659346799) is active in the NPPES registry as of the last update on 2023-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.