Joseph Mark Pruner, M.D.
Internal Medicine Physician · Waterbury, CT
Joseph Mark Pruner, M.D. is an internal medicine physician with a practice address in Waterbury, Connecticut, and NPI 1427493048, issued on May 9, 2013. Check the license (Connecticut 55238, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Joseph Mark Pruner
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 55238 CT
Self-reported in NPPES; status is on the state search - Practice location
- 56 Franklin Street, Waterbury, CT 06706
- Phone
- (203) 704-1195
- Enumerated
- May 9, 2013
- Record last updated
- Oct 28, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160726002858); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 56 Franklin Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joseph Mark Pruner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 55238Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.7 times the Medicare Part D claims of the average internal medicine physician in 2024
14,816 Medicare Part D claims for 933 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 124 claims were for opioids.
Most prescribed
- Atorvastatin Calcium720 claims
- Levothyroxine Sodium714 claims
- Amlodipine Besylate469 claims
- Pantoprazole Sodium454 claims
- Rosuvastatin Calcium445 claims
- Lisinopril380 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.
Industry payments in 2024: $4,655.00
211 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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 2 group practices
- Ptsma IncFairfield, CT
- Trinity Health OF New England Provider Network Organization IncWaterbury, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Mark Pruner among 2,623 internal medicine physician records in Connecticut
Joseph Mark Pruner, 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. Its NPI, issued in 2013, is newer than 70% of them.
- NPI issued2013 · 70% of these records are older, 28% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2013 · median 2004 among the 1,646 with a school on file
- Record last updated2021 · 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).
119 internal medicine physician records list a practice address in Waterbury
They are 119 of the 3,148 NPPES records with a practice address in Waterbury, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Waterbury → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Shawnette Alston, MDWaterbury, CT 067061568495604
- Sondra Bogursky, MDWaterbury, CT 067061790711059
- Ann Conti-Kelly, M.D.Waterbury, CT 067061730283110
- Leslie Coopersmith, MDWaterbury, CT 067061801844147
- Melisha CumberlandWaterbury, CT 067061073704813
- Samer Ein Alshaeba, M.D.Waterbury, CT 067061477591097
- Franco Galasso, MDWaterbury, CT 067061174573539
- Chalmers Hamill, MDWaterbury, CT 067061578589370
Common questions
What is Joseph Mark Pruner, M.D.'s NPI number?
Joseph Mark Pruner, M.D.'s National Provider Identifier (NPI) is 1427493048, issued on May 9, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Mark Pruner, M.D. located?
The NPPES record lists a practice address at 56 Franklin Street, Waterbury, CT, 06706. Phone: (203) 704-1195. Providers update this record themselves, so call before visiting.
How can I verify Joseph Mark Pruner, M.D.'s license?
NPPES lists Connecticut license number 55238, 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.
How much does Joseph Mark Pruner, M.D. prescribe under Medicare Part D?
In 2024, Joseph Mark Pruner, M.D. had 14,816 Medicare Part D claims for 933 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.