Quick answers
- Does Christine J. Ko accept Medicare assignment?
- Yes. Medicare's clinician data says Christine J. Ko accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Christine J. Ko see?
- In 2024, CMS data shows 157 Original Medicare patients and 555 services for Christine J. Ko. This counts Original Medicare only and measures volume, not quality.
- What is Christine J. Ko's NPI number?
- 1841258282. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Christine J. Ko, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 157 |
|---|---|
| Services billed to Medicare | 555 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)195 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)87 services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)63 services
- Destruction of precancer skin growth, 1 growth (17000)51 services
- Biopsy of related skin growth, first growth (11102)43 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease51%
- Arthritis43%
- Diabetes40%
- Ischemic heart disease36%
Hospitals where Christine J. Ko works
Medicare's Facility Affiliation Data lists Christine J. Ko at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Bridgeport HospitalBridgeport, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070010
- Yale-New Haven HospitalNew Haven, CT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 070022
Practice locations
Addresses where Christine J. Ko is enrolled with Medicare (CMS data updated October 2, 2026).
- 20 York StNew Haven, CT 06510
- 267 Grant StBridgeport, CT 06610 (203) 384‑3000
- 800 Howard AveNew Haven, CT 06519 (203) 785‑2140
Group practices
Medicare enrollment lists Christine J. Ko as a member of this group (CMS data updated October 2, 2026).
- Yale University2,645 clinicians in the group
Specialties
- Dermatologyprimary
- Pathologyalso
Other dermatologists in New Haven
Clinicians with the same Medicare primary specialty in New Haven, CT — not a recommendation.
Other clinicians in Yale University
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841258282 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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