John Kaczmarek, MD
Obstetrics & Gynecology Physician · Waterbury, CT
John Kaczmarek, MD is an obstetrics & gynecology physician with a practice address in Waterbury, Connecticut, and NPI 1134169204, issued on Jun 7, 2006. Check the license (Connecticut 033371, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John Kaczmarek
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 033371 CT
Self-reported in NPPES; status is on the state search - Practice location
- 134 Grandview Ave, Waterbury, CT 06708
- Phone
- (203) 754-2535
- Enumerated
- Jun 7, 2006
- Record last updated
- Sep 7, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (203) 756-9921
- Medicaid ID
- 001333715 CT
- Medicare enrollment
- Enrolled (PECOS I20110208000269); accepts Medicare assignment
- Medical or professional school
- State University Of Ny Upstate Medical University, 1991
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 707 in Connecticut → Look up another NPI →
Also registered at 134 Grandview Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Daniel Baxter, P.A.Medical Physician Assistant1205144300
- Duncan Belcher, MDDiagnostic Ultrasound Physician1245295054
- Eleanor Berry, MDObstetrics & Gynecology Physician1558300343
- Alok Bhargava, M.D.Neurology with Special Qualifications in Child Neurology Physician1114980968
Verify John Kaczmarek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 033371Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average obstetrics & gynecology physician in 2024
462 Medicare Part D claims for 138 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims. 11 claims were for opioids.
Most prescribed
- Estradiol75 claims
- Triamcinolone Acetonide32 claims
- Oxybutynin Chloride Er26 claims
- Medroxyprogesterone Acetate25 claims
- Metronidazole25 claims
- Veozah22 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 89.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $216.70
11 payments; by number, the most common kind was food and beverage; the largest payer was Mayne Pharma Commercial LLC. The 21,429 providers of this specialty with any payment received $1,030.61 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
- Physicians For Women's Health, LLCSouthbury, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Kaczmarek among 707 obstetrics & gynecology physician records in Connecticut
John Kaczmarek, MD is one of 707 obstetrics & gynecology 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1991 · median 2003 among the 488 with a school on file
- Record last updated2010 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Connecticut
There are 707 obstetrics & gynecology physician records in Connecticut.
All 707 in Connecticut → Every provider in Waterbury → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Elisa Benzoni, DOWaterbury, CT 067081679581847
- Eleanor Berry, MDWaterbury, CT 067081558300343
- Ian Cohen, MDWaterbury, CT 067081437167210
- Frederick Cohn, MDWaterbury, CT 067081588767644
- Jonathan Foster, MDWaterbury, CT 067081538262605
- Gabriel Hakim, M.D.Waterbury, CT 067081649235235
- Arthur Landry, MDWaterbury, CT 067081891735874
- Anne McNulty, M.D.Waterbury, CT 067081356365571
Common questions
What is John Kaczmarek, MD's NPI number?
John Kaczmarek, MD's National Provider Identifier (NPI) is 1134169204, issued on Jun 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Kaczmarek, MD located?
The NPPES record lists a practice address at 134 Grandview Ave, Waterbury, CT, 06708. Phone: (203) 754-2535. Providers update this record themselves, so call before visiting.
How can I verify John Kaczmarek, MD's license?
NPPES lists Connecticut license number 033371, 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 John Kaczmarek, MD prescribe under Medicare Part D?
In 2024, John Kaczmarek, MD had 462 Medicare Part D claims for 138 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is John Kaczmarek, MD's MIPS final score?
The 2023 MIPS final score is 89.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.