Elena Mier-Trotter, M.D.
NPI 1891072633 · Ophthalmology Physician · Rockville, MD
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elena Mier-Trotter, M.D. is a Ophthalmology Physician provider in Rockville, MD (NPI 1891072633).
Provider details
- NPI number
- 1891072633
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- D0050580 (MD)
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
14 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
238 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 44 | $142 |
| Established Patient Problem Focused Exam of Visual System92012 | 39 | $95 |
| Established Patient Complete Exam of Visual System92014 | 32 | $140 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 29 | $101 |
| Imaging of Optic Nerve92133 | 27 | $41 |
| Photography of the Retina92250 | 21 | $41 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 99 | 24 |
| Timolol Maleate | 56 | — |
| Brimonidine Tartrate | 22 | — |
| Erythromycin Basebrand: Erythromycin | 16 | — |
| Ketorolac Tromethamine | 15 | — |
| Dorzolamide Hcl | 12 | — |
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 , 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
- 2011-11-08
- Last updated
- 2011-11-08
Frequently asked questions
- What is Elena Mier-Trotter's NPI number?
- Elena Mier-Trotter's National Provider Identifier (NPI) is 1891072633, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elena Mier-Trotter's specialty?
- Elena Mier-Trotter is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Elena Mier-Trotter located?
- Elena Mier-Trotter's practice location on file with NPPES is 11300 Rockville Pike, Rockville, MD 20852-3003.
- What is Elena Mier-Trotter's phone number?
- The practice phone number listed in the NPPES registry for Elena Mier-Trotter is (301) 896-0890.
- Does Elena Mier-Trotter accept Medicare?
- Elena Mier-Trotter is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elena Mier-Trotter's NPI active?
- Yes — Elena Mier-Trotter's NPI (1891072633) is active in the NPPES registry as of the last update on 2011-11-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.