John Kaczmarek, MD
NPI 1134169204 · Obstetrics & Gynecology Physician · Waterbury, CT
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Kaczmarek, MD is a Obstetrics & Gynecology Physician provider in Waterbury, CT (NPI 1134169204).
Provider details
- NPI number
- 1134169204
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 033371 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
99 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Cervical Or Vaginal Cancer Screening; Pelvic and Clinical Breast ExaminationG0101 | 29 | $43 |
| Stool Analysis for Blood to Screen for Colon Tumors82270 | 23 | $4 |
| Screening 3d Breast Mammography77063 | 12 | $56 |
| Screening Mammography77067 | 12 | $139 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 12 | $138 |
| Urinalysis, Manual Test81002 | 11 | $3 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 75 | 19 |
| Triamcinolone Acetonide | 32 | 20 |
| Oxybutynin Chloridebrand: Oxybutynin Chloride Er | 26 | — |
| Medroxyprogesterone Acetate | 25 | 11 |
| Metronidazole | 25 | 16 |
| Fezolinetantbrand: Veozah | 22 | — |
| Fluconazole | 21 | 16 |
| Nitrofurantoin Monohyd/M-Cryst |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$217 across 11 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-07
- Last updated
- 2010-09-07
Frequently asked questions
- What is John Kaczmarek's NPI number?
- John Kaczmarek's National Provider Identifier (NPI) is 1134169204, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Kaczmarek's specialty?
- John Kaczmarek is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is John Kaczmarek located?
- John Kaczmarek's practice location on file with NPPES is 134 Grandview Ave, Waterbury, CT 06708-2507.
- What is John Kaczmarek's phone number?
- The practice phone number listed in the NPPES registry for John Kaczmarek is (203) 754-2535.
- Does John Kaczmarek accept Medicare?
- John Kaczmarek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Kaczmarek's NPI active?
- Yes — John Kaczmarek's NPI (1134169204) is active in the NPPES registry as of the last update on 2010-09-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.