Emerald O'Sullivan-Mejia, MD
NPI 1548461932 · Anatomic Pathology & Clinical Pathology Physician · Fredericksburg, VA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Emerald O'Sullivan-Mejia, MD is a Anatomic Pathology & Clinical Pathology Physician provider in Fredericksburg, VA (NPI 1548461932).
Provider details
- NPI number
- 1548461932
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 37259 (MS)
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 tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
8,288 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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 5,881 | $35 |
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 1,120 | $35 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 369 | $27 |
| Flow Cytometry Technique for Dna Or Cell Analysis, 16 Or More Markers88189 | 162 | $79 |
| Special Stained Specimen Slides to Examine Tissue Including Interpretation and Report88313 | 133 | $11 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 130 | $34 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 across 1 record (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 (4)
- 1208 Office Park DrOxford, MS 38655-3597Phone: (662) 234-9888Fax: (662) 281-8927
- 7900 Airways Blvd Ste 100Southaven, MS 38671-4113Phone: (662) 349-6950Fax: (662) 349-6634
- 589 Garfield St Ste 201Tupelo, MS 38801-6301Phone: (662) 680-5565Fax: (662) 680-5654
- 51 Germantown Ct Ste 309Cordova, TN 38018-4290Phone: (901) 333-0510Fax: (901) 747-2380
Registry dates
- Enumerated
- 2007-05-31
- Last updated
- 2026-06-02
- Certified
- 2026-06-02
Frequently asked questions
- What is Emerald O'Sullivan-Mejia's NPI number?
- Emerald O'Sullivan-Mejia's National Provider Identifier (NPI) is 1548461932, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Emerald O'Sullivan-Mejia's specialty?
- Emerald O'Sullivan-Mejia is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Emerald O'Sullivan-Mejia located?
- Emerald O'Sullivan-Mejia's practice location on file with NPPES is 4600 Spotsylvania Pkwy, Fredericksburg, VA 22408-7762.
- What is Emerald O'Sullivan-Mejia's phone number?
- The practice phone number listed in the NPPES registry for Emerald O'Sullivan-Mejia is (540) 498-4471.
- Does Emerald O'Sullivan-Mejia accept Medicare?
- Emerald O'Sullivan-Mejia is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Emerald O'Sullivan-Mejia's NPI active?
- Yes — Emerald O'Sullivan-Mejia's NPI (1548461932) is active in the NPPES registry as of the last update on 2026-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.