Charles Clifford Cahn, M.D.
Internal Medicine Physician · Danbury, CT
Charles Clifford Cahn, M.D. is an internal medicine physician with a practice address in Danbury, Connecticut, and NPI 1720064504, issued on Dec 22, 2005. Check the license (Connecticut 027811, as entered in NPPES) on the Connecticut Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Charles Clifford Cahn
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 027811 CT
Self-reported in NPPES; status is on the state search - Practice location
- 16 Hospital Ave, Danbury, CT 06810
- Phone
- (203) 748-6665
- Enumerated
- Dec 22, 2005
- Record last updated
- Sep 6, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (203) 790-9550
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
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Verify Charles Clifford Cahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 027811Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Charles Clifford Cahn among 2,623 internal medicine physician records in Connecticut
Charles Clifford Cahn, M.D. is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 89% newer
- In a Medicare fileNo · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
112 internal medicine physician records list a practice address in Danbury
They are 112 of the 2,412 NPPES records with a practice address in Danbury, and 2,623 internal medicine physician records in Connecticut. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,623 in Connecticut → Every provider in Danbury → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Alka Aggarwal, MDDanbury, CT 068101427041987
- Karen Coblens, MDDanbury, CT 068101063479848
- Allen Davis, M.D.Danbury, CT 068101639163439
- Amin Elashker, DODanbury, CT 068101093794182
- Sateesh Kathiravelu, M.D.Danbury, CT 068101083665244
- Asha Marhatta, MD; MPHDanbury, CT 068101366490013
- Kathleen Mauks, M.D.Danbury, CT 068101629064035
- Anne Mauks, M.D.Danbury, CT 068101427044569
Common questions
What is Charles Clifford Cahn, M.D.'s NPI number?
Charles Clifford Cahn, M.D.'s National Provider Identifier (NPI) is 1720064504, issued on Dec 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Charles Clifford Cahn, M.D. located?
The NPPES record lists a practice address at 16 Hospital Ave, Danbury, CT, 06810. Phone: (203) 748-6665. Providers update this record themselves, so call before visiting.
How can I verify Charles Clifford Cahn, M.D.'s license?
NPPES lists Connecticut license number 027811, 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. 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.