DANIEL D MAST (D.O.) – Internal Medicine Physician, NPI 1104910140
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for DANIEL D MAST (D.O.)
700 W LEA BLVD STE 300
WILMINGTON, DE 198022546
Phone:
Type: Mailing
700 W Lea Blvd
Suite 300
Wilmington, DE 198022546
Phone: (302) 320-4050
Fax: (302) 762-3705
Type: Location
105 HERRVILLE RD
WILLOW STREET, PA 175848908
Phone: (717) 471-4260
Type: Mailing
802 NEW HOLLAND AVE STE 200
LANCASTER, PA 176022288
Phone: (717) 299-6371
Type: Location
700, West Lea Boulevard, Harlan, Wilmington, New Castle County, Delaware, 19802, United States
SUITE 300
WILMINGTON, DE 198022546
Phone: (302) 320-4050
Fax: (302) 762-3705
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: 2018-07-27
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 |
|---|---|---|---|---|
| I20070725000258 | I | Internal Medicine | PA | TBD |
| I20180727000210 | I | Internal Medicine | DE | 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 19802)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| INTERNAL MEDICINE | PA | 11042 | Removal of skin and tissue first 20 sq cm or less | 617 | 181 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | DE | |
| - | DE | |
| - | DE | |
| - | PA | |
| Internal Medicine | DE | |
| Physician Assistant | DE | |
| Nurse Practitioner | PA | |
| General Surgery | IL | |
| Diagnostic Radiology | NY | |
| Internal Medicine | NY |
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