DR. MARK D FLEMING (MD) – Hematology (Pathology) Physician, NPI 1235148404
Hematology (Pathology) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
799 PATHOLOGY in MA
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Provider Addresses for DR. MARK D FLEMING (MD)
Children's Hospital Library, 300, Longwood Avenue, Roxbury, Boston, Suffolk County, Massachusetts, 02120, United States
BOSTON, MA 021155724
Phone: (617) 355-6000
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 4 Open Payments records for all available years, with a total value of $9,163.
Total Amount is formed as General ($9,163) + Research ($0) + Ownership ($0) = $9,163.
Last reported payment date: 2024-04-29 • Largest payer in this snapshot: VERTEX PHARMACEUTICALS INCORPORATED ($6,000).
Total Amount
$9,163
General + Research + Ownership
Payments
4
Total payment records
General Amount
$9,163
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-04-29
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| VERTEX PHARMACEUTICALS INCORPORATED | $6,000 |
| Vertex Pharmaceuticals Incorporated | $3,000 |
| Innovation Technologies Inc | $163 |
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: 2011-12-16
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 |
|---|---|---|---|---|
| I20111216000207 | I | Pathology | MA | 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 02115)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| P A T H O L O G Y | NH | |
| P A T H O L O G Y | MA | |
| P A T H O L O G Y | MA | |
| P A T H O L O G Y | MA | |
| P A T H O L O G Y | MA | |
| P A T H O L O G Y | MA | |
| - | TX | |
| P A T H O L O G Y | MA | |
| P A T H O L O G Y | MA | |
| P A T H O L O G Y | MA |
Reviews
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