John Dean Klemperer, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Bangor, ME
John Dean Klemperer, MD is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Bangor, Maine, and NPI 1457337172, issued on Dec 15, 2005. Check the license (Maine 015166, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- John Dean Klemperer
- Credential
- MD
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License number
- 015166 ME
Self-reported in NPPES; status is on the state search - Practice location
- 417 State St Ste 421, Bangor, ME 04401
- Phone
- (207) 973-5293
- Enumerated
- Dec 15, 2005
- Record last updated
- Apr 9, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (207) 973-5263
- Medicaid ID
- 1175950000 ME
- Medicare enrollment
- Enrolled (PECOS I20050818000809); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 1990
- Entity
- Type 1 · individual
Also registered at 417 State St Ste 421
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Darci Bubar, FNPNurse Practitioner1528395720
- Alysn Healy, PA-CPhysician Assistant1104169663
- Darryl Hoffman, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1013995760
- Gary Keller, M.D. PH.DSurgery Physician1083640304
- David Pantino, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1134417462
- Jacob Paul, DNP, APRN, ACNPC-AGCritical Care Medicine Nurse Practitioner1831798685
Verify John Dean Klemperer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license 015166Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
27 Medicare Part D claims for 15 beneficiaries, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $10,287.34
15 payments; by number, the most common kind was food and beverage; the largest payer was Atricure, Inc. The 4,047 providers of this specialty with any payment received $7,828.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Eastern Maine Medical CenterBangor, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in Maine
There are 25 thoracic surgery (cardiothoracic vascular surgery) physician records in Maine.
Other thoracic surgery (cardiothoracic vascular surgery) physician records in Maine
- Ziyad Binsalamah, M.D.Portland, ME1164843207
- Scott Buchanan, M.D.Portland, ME1932154135
- Robert Clough, MDBangor, ME1528044245
- Walter Denino, MDPortland, ME1114238755
- Desmond Donegan, M.D.Falmouth, ME1104872050
- Carmine Frumiento, MDLewiston, ME1912987645
- Ansar Hassan, MDPortland, ME1689859332
- Felix Hernandez, MDBangor, ME1912983636
- Gary Hochheiser, MDScarborough, ME1689678112
- Darryl Hoffman, MDBangor, ME1013995760
Common questions
What is John Dean Klemperer, MD's NPI number?
John Dean Klemperer, MD's National Provider Identifier (NPI) is 1457337172, issued on Dec 15, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Dean Klemperer, MD located?
The NPPES record lists a practice address at 417 State St Ste 421, Bangor, ME, 04401. Phone: (207) 973-5293. Providers update this record themselves, so call before visiting.
How can I verify John Dean Klemperer, MD's license?
NPPES lists Maine license number 015166, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Dean Klemperer, MD prescribe under Medicare Part D?
In 2024, John Dean Klemperer, MD had 27 Medicare Part D claims for 15 beneficiaries; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.