Carlos Martinez Rivera, MD
NPI 1356330310 · Endocrinology, Diabetes & Metabolism Physician · Mayaguez, PR
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carlos Martinez Rivera, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Mayaguez, PR (NPI 1356330310).
Provider details
- NPI number
- 1356330310
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 12424 (PR)
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
210 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 186 | $89 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 24 | $33 |
Typical Medicare-allowed amounts for these services range $33–$89 (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 · 155 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodiumbrand: Synthroid | 5,342 | 996 |
| Rosuvastatin Calcium | 2,881 | 680 |
| Atorvastatin Calcium | 1,935 | 496 |
| Losartan Potassium | 1,933 | 465 |
| Insulin Lisprobrand: Humalog Kwikpen U-100 | 1,783 | 359 |
| Metformin Hclbrand: Metformin Hcl Er | 1,652 | 381 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$87 across 4 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
- 2005-10-20
- Last updated
- 2023-05-02
- Certified
- 2023-05-02
Frequently asked questions
- What is Carlos Martinez Rivera's NPI number?
- Carlos Martinez Rivera's National Provider Identifier (NPI) is 1356330310, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carlos Martinez Rivera's specialty?
- Carlos Martinez Rivera is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Carlos Martinez Rivera located?
- Carlos Martinez Rivera's practice location on file with NPPES is 27 Calle Nelson Perea, Mayaguez, PR 00680-4949.
- What is Carlos Martinez Rivera's phone number?
- The practice phone number listed in the NPPES registry for Carlos Martinez Rivera is (787) 805-0595.
- Does Carlos Martinez Rivera accept Medicare?
- Carlos Martinez Rivera is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carlos Martinez Rivera's NPI active?
- Yes — Carlos Martinez Rivera's NPI (1356330310) is active in the NPPES registry as of the last update on 2023-05-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.