Quick answers
- Which hospitals does Karen Halasan work at?
- Medicare's official clinician data lists Karen Halasan at 2 hospitals: Danbury Hospital and Norwalk Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Karen Halasan see patients?
- Medicare's clinician data lists 2 practice locations, including Norwalk, CT. Call before your visit to confirm the address.
- What is Karen Halasan's specialty?
- Medicare lists Pulmonary Disease as the primary specialty.
- Does Karen Halasan accept Medicare assignment?
- Yes. Medicare's clinician data says Karen Halasan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Karen Halasan offer telehealth?
- Medicare's clinician data says Karen Halasan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Karen Halasan?
- (203) 852-2000, as listed in official Medicare / NPI Registry data.
- What is Karen Halasan's NPI number?
- 1508029836. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Karen Halasan works
Medicare's Facility Affiliation Data lists Karen Halasan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Danbury HospitalDanbury, CT · Acute Care Hospital · CCN 070033
- Norwalk HospitalNorwalk, CT · Acute Care Hospital · CCN 070034
Practice locations
Addresses where Karen Halasan is enrolled with Medicare (CMS data updated 2026-10-02).
- 24 Stevens StNorwalk, CT 06850 (203) 852‑2000
- 40 Cross StNorwalk, CT 06851 (203) 546‑3377
Group practices
Medicare enrollment lists Karen Halasan as a member of this group (CMS data updated 2026-10-02).
- Nuvance Health Medical Practice Ct Inc747 clinicians in the group
Specialties
- Pulmonary Diseaseprimary
Other pulmonologists in Norwalk
Clinicians with the same Medicare primary specialty in Norwalk, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1508029836 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians