Ruth Diaz, MD
NPI 1235119066 · Internal Medicine Physician · Hauppauge, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ruth Diaz, MD is a Internal Medicine Physician provider in Hauppauge, NY (NPI 1235119066).
Provider details
- NPI number
- 1235119066
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 116667 (NY)
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
93 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 56 | $202 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 37 | $140 |
Typical Medicare-allowed amounts for these services range $140–$202 (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 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pravastatin Sodium | 72 | 22 |
| Ramipril | 66 | 16 |
| Amlodipine Besylate | 46 | 13 |
| Levothyroxine Sodium | 41 | 13 |
| Metoprolol Succinate | 40 | 15 |
| Zolpidem Tartrate | 27 | — |
| Atorvastatin Calcium | 22 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-18
- Last updated
- 2020-02-25
- Certified
- 2020-02-25
Frequently asked questions
- What is Ruth Diaz's NPI number?
- Ruth Diaz's National Provider Identifier (NPI) is 1235119066, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruth Diaz's specialty?
- Ruth Diaz is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ruth Diaz located?
- Ruth Diaz's practice location on file with NPPES is 515 Route 111, Hauppauge, NY 11788-4339.
- What is Ruth Diaz's phone number?
- The practice phone number listed in the NPPES registry for Ruth Diaz is (631) 224-1819.
- Does Ruth Diaz accept Medicare?
- Ruth Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ruth Diaz's NPI active?
- Yes — Ruth Diaz's NPI (1235119066) is active in the NPPES registry as of the last update on 2020-02-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.