Doctor profile · Federal record
Dr. John Klemperer, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (CMS: Cardiac Surgery) · Bangor, ME
- NPI 1457337172
- Accepts Medicare
- 36 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
417 State St Ste 421
Bangor, ME 044016639
(207) 973-5293
fax (207) 973-5263 - Additional location
-
489 State St
Bangor, ME 044016616
(207) 973-7000 - Mailing address
-
43 Whiting Hill RD Ste 300
Brewer, ME 044121006
Credentials & registration
- NPI registered
- December 2005 — 21 yrs on file
- Profile last updated
- April 9, 2020
- Year of graduation
- 1990 — 36 yrs since
- Specialty taxonomy
- 208G00000X — NUCC code
- State license (1)
- Maine #015166
- Medicaid
- ME #1175950000
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1457337172. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
59
Distinct HCPCS
2
Medicare allowed
$7,891
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99204 |
New patient office or other outpatient visit, 45-59 minutes | 46 | 46 | $125 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 13 | 13 | $164 |
In context: peer comparison
Among 2 peers in Bangor Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician, average services per provider: 21. This provider delivers 2.8× the peer median.Open Payments
Industry payments received
All-time total
$10,287
Transactions
15
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Atricure, INC. | 6 | $9,614.79 | |
| Edwards Lifesciences Corporation | 3 | $293.23 | |
| Intuitive Surgical, INC. | 2 | $205.25 | |
| Abiomed | 4 | $174.07 |
By nature of payment
Hospital affiliations
Frequently asked questions
What is Dr. John Klemperer's medical specialty?
Dr. John Klemperer practices Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Bangor, ME.
Where does Dr. John Klemperer practice?
Dr. John Klemperer practices at 417 State St Ste 421, Bangor, ME 044016639. Office phone: 2079735293.
What is Dr. John Klemperer's NPI?
Dr. John Klemperer's National Provider Identifier (NPI) is 1457337172, issued by NPPES.
Does Dr. John Klemperer accept Medicare assignment?
Yes. Dr. John Klemperer accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Klemperer commonly perform?
Top Medicare-reported procedures in 2023: New patient office or other outpatient visit (HCPCS 99204); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.