John Merendino, M.D.
NPI 1316042831 · Endocrinology, Diabetes & Metabolism Physician · Bethesda, MD
John Merendino, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Bethesda, MD (NPI 1316042831).
Provider details
- NPI number
- 1316042831
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- D36046 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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 · 78 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 369 | 99 |
| Tirzepatidebrand: Mounjaro | 342 | 52 |
| Levothyroxine Sodiumbrand: Synthroid | 280 | 78 |
| Metformin Hcl | 249 | 77 |
| Semaglutidebrand: Ozempic | 180 | 39 |
| Empagliflozinbrand: Jardiance | 174 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$217 across 11 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
- 2006-09-13
- Last updated
- 2016-03-30
Frequently asked questions
- What is John Merendino's NPI number?
- John Merendino's National Provider Identifier (NPI) is 1316042831, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Merendino's specialty?
- John Merendino is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is John Merendino located?
- John Merendino's practice location on file with NPPES is 10215 Fernwood Rd, Bethesda, MD 20817-1106.
- What is John Merendino's phone number?
- The practice phone number listed in the NPPES registry for John Merendino is (301) 230-0300.
- Is John Merendino's NPI active?
- Yes — John Merendino's NPI (1316042831) is active in the NPPES registry as of the last update on 2016-03-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.