HOLLY ANN MAZUR (M.D.) – Internal Medicine Physician, NPI 1295780617
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
7,722 INTERNAL MEDICINE in MA
Provider Addresses for HOLLY ANN MAZUR (M.D.)
321 MAIN ST
ACTON, MA 017203799
Phone: (978) 635-8700
Type: Mailing
26, Queen Street, Piedmont, Worcester, Worcester County, Massachusetts, 01609-2915, United States
WORCESTER, MA 016102473
Phone: (508) 860-7700
Type: Mailing
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 $16.
Total Amount is formed as General ($16) + Research ($0) + Ownership ($0) = $16.
Last reported payment date: 2024-09-20 • Largest payer in this snapshot: Phadia US Inc. ($16).
Total Amount
$16
General + Research + Ownership
Payments
1
Total payment records
General Amount
$16
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-09-20
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Phadia US Inc. | $16 |
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: 2003-11-26
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 |
|---|---|---|---|---|
| I20031126000125 | I | Internal Medicine | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 36415 | Insertion of needle into vein for collection of blood sample | 400 | 218 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 315 | 190 | $0 |
| 85025 | Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 243 | 177 | $0 |
| 80053 | Blood test, comprehensive group of blood chemicals | 177 | 151 | $0 |
| 80061 | Blood test, lipids (cholesterol and triglycerides) | 141 | 131 | $0 |
Insurance plans in this area (ZIP 01720)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | MA | |
| - | MA | |
| - | MA | |
| Nurse Practitioner | MA | |
| Physician Assistant | MA | |
| Nurse Practitioner | MA | |
| Nurse Practitioner | MA | |
| Nurse Practitioner | MA | |
| Family Practice | MA | |
| Nurse Practitioner | MA |
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