Daniel Kleiner, MD
Surgical Oncology Physician · Danbury, CT
Daniel Kleiner, MD is a surgical oncology physician with a practice address in Danbury, Connecticut, and NPI 1033324496, issued on May 11, 2007. Check the license (Connecticut 52397, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Daniel Kleiner
- Credential
- MD
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License number
- 52397 CT
Self-reported in NPPES; status is on the state search - Practice location
- 111 Osborne St, Danbury, CT 06810
- Phone
- (203) 739-7131
- Enumerated
- May 11, 2007
- Record last updated
- Nov 23, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (203) 739-1554
- Entity
- Type 1 · individual
8 nearest surgical oncology physician records → All 38 in Connecticut → Look up another NPI →
Also registered at 111 Osborne St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Steven Brandwein, M.D.Gastroenterology Physician1174542450
- Jason Costa, M.D.Cardiovascular Disease Physician1588007645
- Charlene Deluca, MS, RD, CDNRegistered Dietitian1285226282
- Cynthia Fiore, PAPhysician Assistant1467051920
Verify Daniel Kleiner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 52397Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $134.58
1 payment: food and beverage; the largest payer was Smith+Nephew, Inc. The 1,132 providers of this specialty with any payment received $4,224.74 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.
Daniel Kleiner among 38 surgical oncology physician records in Connecticut
Daniel Kleiner, MD is one of 38 surgical oncology physician records with a practice address in Connecticut. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 45% of them.
- NPI issued2007 · 45% of these records are older, 32% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 71% of these records are
- Record last updated2020 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086X0206X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Oncology Physician providers in Connecticut
There are 38 surgical oncology physician records in Connecticut.
All 38 in Connecticut → Every provider in Danbury → Surgical Oncology Physician nationwide →
The 8 surgical oncology physician records with the nearest ZIP codes
- Daniel Labow, MDDanbury, CT 068101346216157
- Ramanathan Madras Seshadri, M.D.Danbury, CT 068101891969937
- Barbara Ward, MDGreenwich, CT 068301356378426
- Mandy Greenberg, M.D.Norwalk, CT 068511043414436
- Jonathan Lewis, MD, PHDWestport, CT 068801457038671
- Csaba Gajdos, MDStamford, CT 069021710192083
- Helen Pass, M.D.Stamford, CT 069021902810203
- Michael Stone, M.D.Stamford, CT 069021356300859
Common questions
What is Daniel Kleiner, MD's NPI number?
Daniel Kleiner, MD's National Provider Identifier (NPI) is 1033324496, issued on May 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Kleiner, MD located?
The NPPES record lists a practice address at 111 Osborne St, Danbury, CT, 06810. Phone: (203) 739-7131. Providers update this record themselves, so call before visiting.
How can I verify Daniel Kleiner, MD's license?
NPPES lists Connecticut license number 52397, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.