DR. MICHAEL PETER ZACKS (MD) – Internal Medicine Physician, NPI 1043289622
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
Loading map...
Provider Addresses for DR. MICHAEL PETER ZACKS (MD)
83, Spring Street, Shrewsbury, Worcester County, Massachusetts, 01545, United States
SHREWSBURY, MA 01545
Phone: (508) 845-8121
Type: Mailing
Newton-Wellesley Hospital, 2014, Washington Street, Newton Lower Falls, Newton, Middlesex County, Massachusetts, 02462, United States
NEWTON WELLESLEY HOSPITAL
NEWTON, MA 02462
Phone: (617) 243-6896
Fax: (617) 243-5148
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
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: 2004-04-09
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 |
|---|---|---|---|---|
| I20040409000028 | I | Hospitalist | 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 |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 186 | 106 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 76 | 60 | $0 |
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 46 | 25 | $0 |
| 99238 | Hospital discharge day management, 30 minutes or less | 46 | 46 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 11 | 11 | $0 |
Insurance plans in this area (ZIP 01545)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| N E U R O L O G Y | MA | |
| Family Practice | NY | |
| Internal Medicine | MA | |
| - | MA | |
| - | MA | |
| - | CO | |
| - | MA | |
| Pulmonary Disease, Critical Care (Intensivists), Internal Medicine | MA | |
| - | MA | |
| - | MA |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.