Nikolaos Diakos, M.D.
NPI 1659791507 · Interventional Cardiology Physician · Houston, TX
Enrolled with Medicare as Practitioner - Interventional Cardiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nikolaos Diakos, M.D. is a Interventional Cardiology Physician provider in Houston, TX (NPI 1659791507).
Provider details
- NPI number
- 1659791507
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- T9668 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
813 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 181 | $120 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 114 | $79 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 112 | $14 |
| Evaluation of Lower Heart Chamber Assist Device93750 | 105 | $41 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 100 | $92 |
| Critical Care, First 30-74 Minutes99291 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 72 | 28 |
| Metoprolol Succinate | 69 | 22 |
| Amlodipine Besylate | 61 | 17 |
| Losartan Potassium | 42 | 18 |
| Apixabanbrand: Eliquis | 38 | 11 |
| Lisinopril | 33 | — |
| Empagliflozin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,583 across 67 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
Additional practice locations (2)
- 800 Washington StBoston, MA 02111-1552Phone: (617) 636-8137
- 30 North 1900 East, 4c116 SomSalt Lake City, UT 84132Phone: (801) 581-7899
Registry dates
- Enumerated
- 2014-04-18
- Last updated
- 2023-03-20
- Certified
- 2023-03-20
Frequently asked questions
- What is Nikolaos Diakos's NPI number?
- Nikolaos Diakos's National Provider Identifier (NPI) is 1659791507, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nikolaos Diakos's specialty?
- Nikolaos Diakos is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Nikolaos Diakos located?
- Nikolaos Diakos's practice location on file with NPPES is 6624 Fannin St, Houston, TX 77030-2338.
- What is Nikolaos Diakos's phone number?
- The practice phone number listed in the NPPES registry for Nikolaos Diakos is (713) 790-9401.
- Does Nikolaos Diakos accept Medicare?
- Nikolaos Diakos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nikolaos Diakos's NPI active?
- Yes — Nikolaos Diakos's NPI (1659791507) is active in the NPPES registry as of the last update on 2023-03-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.