DR. EMERALD DAWN O'SULLIVAN-MEJIA (MD) – Anatomic Pathology & Clinical Pathology Physician, NPI 1548461932
Anatomic Pathology & Clinical Pathology Physician
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Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
318 PATHOLOGY in VA
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Provider Addresses for DR. EMERALD DAWN O'SULLIVAN-MEJIA (MD)
9834, Business Way, Ashton Professional Center, Manassas, Manassas (city), Virginia, 20110, United States
MANASSAS, VA 201104151
Phone: (703) 257-1440
Fax: (703) 257-4337
Type: Mailing
Spotsylvania Regional Medical Center, 4600, Spotsylvania Parkway, Fredericksburg, Spotsylvania County, Virginia, 22408, United States
FREDERICKSBURG, VA 224087762
Phone: (540) 498-4471
Type: Location
51 Germantown Ct Ste 309
Cordova, TN 380184290
Phone: (901) 333-0510
Fax: (901) 747-2380
Type: Location
589 Garfield St Ste 201
Tupelo, MS 388016301
Phone: (662) 680-5565
Fax: (662) 680-5654
Type: Location
7900 Airways Blvd Ste 100
Southaven, MS 386714113
Phone: (662) 349-6950
Fax: (662) 349-6634
Type: Location
1208 Office Park Dr
Oxford, MS 386553597
Phone: (662) 234-9888
Fax: (662) 281-8927
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $14.
Total Amount is formed as General ($14) + Research ($0) + Ownership ($0) = $14.
Last reported payment date: 2024-02-28 • Largest payer in this snapshot: Genentech USA, Inc. ($14).
Total Amount
$14
General + Research + Ownership
Payments
1
Total payment records
General Amount
$14
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-02-28
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Genentech USA, Inc. | $14 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2011-12-08
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20111208000538 | I | Pathology | VA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | 5,893 | 1,708 | $0 |
| 88342 | Special stained specimen slides to examine tissue, initial procedure | 139 | 131 | $0 |
| 88189 | Flow cytometry technique for dna or cell analysis, 16 or more markers | 134 | 122 | $0 |
| 88374 | Microscopic genetic analysis of tissue, computer-assisted technology, initial procedure, each multiplex procedure | 45 | 11 | $0 |
| 88312 | Special stained specimen slides to identify organisms including interpretation and report | 39 | 32 | $0 |
Insurance plans in this area (ZIP 20110)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| PATHOLOGY | VA | 88304 | Pathology examination of tissue using a microscope, moderately low complexity | 91 | 70 |
| PATHOLOGY | VA | 88307 | Pathology examination of tissue using a microscope, moderately high complexity | 34 | 26 |
| PATHOLOGY | VA | 88312 | Special stained specimen slides to identify organisms including interpretation and report | 28 | 20 |
| PATHOLOGY | VA | 88342 | Tissue or cell analysis by immunologic technique | 36 | 35 |
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