MR. JOHN DEAN KLEMPERER (MD) – Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician, NPI 1457337172
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
9 CARDIAC SURGERY in ME
Provider Addresses for MR. JOHN DEAN KLEMPERER (MD)
489 State St
Bangor, ME 044016616
Phone: (207) 973-7000
Type: Location
421, Bog Road, Bangor, Penobscot County, Maine, 04401, United States
BANGOR, ME 044016639
Phone: (207) 973-5293
Fax: (207) 973-5263
Type: Location
43 WHITING HILL RD STE 300
BREWER, ME 044121006
Phone: (207) 973-5035
Fax: (207) 973-5042
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 29 Open Payments records for all available years, with a total value of $22,947.
Total Amount is formed as General ($22,947) + Research ($0) + Ownership ($0) = $22,947.
Last reported payment date: 2024-12-06 • Largest payer in this snapshot: ATRICURE, INC. ($17,565).
Total Amount
$22,947
General + Research + Ownership
Payments
29
Total payment records
General Amount
$22,947
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-06
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ATRICURE, INC. | $17,565 |
| Intuitive Surgical, Inc. | $4,401 |
| Edwards Lifesciences Corporation | $712 |
| ABIOMED | $269 |
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: 2005-08-18
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 |
|---|---|---|---|---|
| I20050818000809 | I | Cardiac Surgery | ME | 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 |
|---|---|---|---|---|
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 46 | 46 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 13 | 13 | $0 |
Insurance plans in this area (ZIP 04401)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | ME | |
| Nurse Practitioner | ME | |
| Certified Registered Nurse Anesthetist (Crna) | ME | |
| Cardiovascular Disease (Cardiology) | ME | |
| Endocrinology, Internal Medicine | ME | |
| - | ME | |
| Nurse Practitioner | ME | |
| Thoracic Surgery | ME | |
| H O S P I T A L I S T | ME | |
| - | NJ |
Reviews
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