Doctor profile · Federal record
Dr. Emerald O'Sullivan-Mejia, MD
Anatomic Pathology & Clinical Pathology Physician (CMS: Pathology) · Fredericksburg, VA
- NPI 1548461932
- Accepts Medicare
- 21 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
4600 Spotsylvania Pkwy
Fredericksburg, VA 224087762
(540) 498-4471 - Mailing address
-
9834 Business Way
Manassas, VA 201104151
Credentials & registration
- NPI registered
- May 2007 — 19 yrs on file
- Profile last updated
- February 1, 2018
- Year of graduation
- 2005 — 21 yrs since
- Specialty taxonomy
- 207ZP0102X — NUCC code
- State license (1)
- Virginia #0101244383
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1548461932. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
6,286
Distinct HCPCS
6
Medicare allowed
$230,742
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
88305 |
Pathology examination of tissue using a microscope, intermediate complexity | 5,893 | 1,708 | $36 | |
88342 |
Special stained specimen slides to examine tissue, initial procedure | 139 | 131 | $34 | |
88189 |
Flow cytometry technique for dna or cell analysis, 16 or more markers | 134 | 122 | $81 | |
88374 |
Microscopic genetic analysis of tissue, computer-assisted technology, initial procedure, each multiplex procedure | 45 | 11 | $41 | |
88312 |
Special stained specimen slides to identify organisms including interpretation and report | 39 | 32 | $28 | |
88313 |
Special stained specimen slides to examine tissue including interpretation and report | 36 | 33 | $12 |
In context: peer comparison
Among 2 peers in Fredericksburg Anatomic Pathology & Clinical Pathology Physician, average services per provider: 395. This provider delivers 16× the peer median.Open Payments
Industry payments received
All-time total
$14
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Genentech USA, INC. | 1 | $14.45 |
By nature of payment
Frequently asked questions
What is Dr. Emerald O'Sullivan-Mejia's medical specialty?
Dr. Emerald O'Sullivan-Mejia practices Anatomic Pathology & Clinical Pathology Physician in Fredericksburg, VA.
Where does Dr. Emerald O'Sullivan-Mejia practice?
Dr. Emerald O'Sullivan-Mejia practices at 4600 Spotsylvania Pkwy, Fredericksburg, VA 224087762. Office phone: 5404984471.
What is Dr. Emerald O'Sullivan-Mejia's NPI?
Dr. Emerald O'Sullivan-Mejia's National Provider Identifier (NPI) is 1548461932, issued by NPPES.
Does Dr. Emerald O'Sullivan-Mejia accept Medicare assignment?
Yes. Dr. Emerald O'Sullivan-Mejia accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Emerald O'Sullivan-Mejia commonly perform?
Top Medicare-reported procedures in 2023: Pathology examination of tissue using a microscope, intermediate complexity (HCPCS 88305); Special stained specimen slides to examine tissue, initial procedure (HCPCS 88342); Flow cytometry technique for dna or cell analysis, 16 or more markers (HCPCS 88189). Source: CMS Medicare Physician & Other Practitioners file.