John Karl Holzinger, DMD
Dentist · Middletown, CT
John Karl Holzinger, DMD is a dentist with a practice address in Middletown, Connecticut, and NPI 1508976374, issued on Aug 30, 2006. Check the license (Connecticut 05923, as entered in NPPES) with the Connecticut board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Karl Holzinger
- Credential
- DMD
- Primary taxonomy
- Dentist 122300000X
- License number
- 05923 CT
Self-reported in NPPES; status is on the state search - Practice location
- 770 Saybrook RD, Middletown, CT 06457
- Phone
- (860) 347-8457
- Enumerated
- Aug 30, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (860) 347-4393
- Entity
- Type 1 · individual
Also registered at 770 Saybrook RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Karl Holzinger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license 05923Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average dentist in 2024
27 Medicare Part D claims, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
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.
Dentist providers in Connecticut
There are 862 dentist records in Connecticut.
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Common questions
What is John Karl Holzinger, DMD's NPI number?
John Karl Holzinger, DMD's National Provider Identifier (NPI) is 1508976374, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Karl Holzinger, DMD located?
The NPPES record lists a practice address at 770 Saybrook RD, Middletown, CT, 06457. Phone: (860) 347-8457. Providers update this record themselves, so call before visiting.
How can I verify John Karl Holzinger, DMD's license?
NPPES lists Connecticut license number 05923, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity only.
How much does John Karl Holzinger, DMD prescribe under Medicare Part D?
In 2024, John Karl Holzinger, DMD had 27 Medicare Part D claims; the average among dentist prescribers was 86. 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.