Juan Mejia Sierra, MD
NPI 1891427837 · Student in an Organized Health Care Education/Training Program · New Haven, CT
Juan Mejia Sierra, MD is a Student in an Organized Health Care Education/Training Program provider in New Haven, CT (NPI 1891427837).
Provider details
- NPI number
- 1891427837
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 23 | 15 |
| Baclofen | 22 | 11 |
| Diclofenac Sodium | 15 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-06-28
- Last updated
- 2026-04-23
- Certified
- 2026-04-23
Frequently asked questions
- What is Juan Mejia Sierra's NPI number?
- Juan Mejia Sierra's National Provider Identifier (NPI) is 1891427837, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Juan Mejia Sierra's specialty?
- Juan Mejia Sierra is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Juan Mejia Sierra located?
- Juan Mejia Sierra's practice location on file with NPPES is 20 York St, New Haven, CT 06510-3220.
- What is Juan Mejia Sierra's phone number?
- The practice phone number listed in the NPPES registry for Juan Mejia Sierra is (203) 688-4242.
- Is Juan Mejia Sierra's NPI active?
- Yes — Juan Mejia Sierra's NPI (1891427837) is active in the NPPES registry as of the last update on 2026-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.