MARK KLEIN (M.D.) – Specialist, NPI 1194776419
Specialist
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for MARK KLEIN (M.D.)
Williams Drive, Pine Ridge, Annandale, Fairfax (city), Virginia, 22031, United States
STE 200
FAIRFAX, VA 220314623
Phone: (703) 641-9133
Fax: (703) 280-5098
Type: Mailing
2141, K Street Northwest, Golden Triangle, Washington, Washington, D.C., 20036-5305, United States
STE 900
WASHINGTON, DC 200371810
Phone: (202) 223-9722
Fax: (703) 280-5098
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 $18.
Total Amount is formed as General ($18) + Research ($0) + Ownership ($0) = $18.
Last reported payment date: 2023-03-29 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($18).
Total Amount
$18
General + Research + Ownership
Payments
1
Total payment records
General Amount
$18
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-03-29
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $18 |
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: 2009-06-01
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 |
|---|---|---|---|---|
| I20090601000552 | I | Diagnostic Radiology | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 22031)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| DIAGNOSTIC RADIOLOGY | DC | 76830 | Ultrasound pelvis through vagina | 20 | 20 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Diagnostic Radiology | VA | |
| Diagnostic Radiology | VA | |
| Diagnostic Radiology | GA | |
| Diagnostic Radiology | MA | |
| Diagnostic Radiology | TN | |
| Diagnostic Radiology | OH | |
| Diagnostic Radiology | VA | |
| Diagnostic Radiology | MD | |
| - | VA | |
| Diagnostic Radiology | MD |
Reviews
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