Jerzy Chachaj, M.D.
NPI 1205857117 · Internal Medicine Physician · Danbury, CT
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jerzy Chachaj, M.D. is a Internal Medicine Physician provider in Danbury, CT (NPI 1205857117).
Provider details
- NPI number
- 1205857117
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 034312 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 42 | 12 |
| Metformin Hcl | 39 | — |
| Levothyroxine Sodium | 24 | — |
| Losartan Potassium | 22 | — |
| Sertraline Hcl | 21 | — |
| Simvastatin | 20 | — |
| Amlodipine Besylate | 19 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is Jerzy Chachaj's NPI number?
- Jerzy Chachaj's National Provider Identifier (NPI) is 1205857117, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jerzy Chachaj's specialty?
- Jerzy Chachaj is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jerzy Chachaj located?
- Jerzy Chachaj's practice location on file with NPPES is 24 Hospital Ave, Danbury, CT 06810-6099.
- What is Jerzy Chachaj's phone number?
- The practice phone number listed in the NPPES registry for Jerzy Chachaj is (203) 739-7411.
- Does Jerzy Chachaj accept Medicare?
- Jerzy Chachaj is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jerzy Chachaj's NPI active?
- Yes — Jerzy Chachaj's NPI (1205857117) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.