MARY ELIZABETH WALKER (PA-C) – Physician Assistant, NPI 1104169549
Physician Assistant
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Profile Insights
NPPES metrics only — not quality of care.
3,366 PHYSICIAN ASSISTANT in MD
Provider Addresses for MARY ELIZABETH WALKER (PA-C)
3001 S HANOVER ST
BALTIMORE, MD 212251233
Phone: (410) 350-8328
Fax: (410) 350-8344
Type: Mailing
19465 DEERFIELD AVE STE 405
LEESBURG, VA 201761707
Phone: (703) 858-1800
Fax: (703) 858-1801
Type: Mailing
220 CAMPUS BLVD STE 100
WINCHESTER, VA 226012896
Phone: (540) 536-5100
Fax: (540) 536-0235
Type: Mailing
400 CAMPUS BLVD STE 210
WINCHESTER, VA 226016906
Phone: (540) 536-3470
Fax: (540) 536-3471
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2021-04-05
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20130513000150 | I | Physician Assistant | MD | TBD |
| I20210405001098 | I | Physician Assistant | 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 |
|---|---|---|---|---|
| J1100 | Injection, dexamethasone sodium phosphate, 1 mg | 149 | 20 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 60 | 42 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 47 | 47 | $0 |
| 99212 | Established patient office or other outpatient visit, 10-19 minutes | 20 | 19 | $0 |
| 73140 | X-ray of finger, minimum of 2 views | 16 | 12 | $0 |
Insurance plans in this area (ZIP 21225)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| PHYSICIAN ASSISTANT | MD | 22842 | Insertion of posterior spinal instrumentation for spinal stabilization, 3 to 6 vertebral segments | 32 | 32 |
| PHYSICIAN ASSISTANT | MD | 63048 | Partial removal of spine bone with release of spinal cord and/or nerves | 109 | 36 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Orthopedic Surgery | VA | |
| Nurse Practitioner | VA | |
| Orthopedic Surgery | VA |
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