Quick answers
- Does Kristen O'Hagan accept Medicare assignment?
- Yes. Medicare's clinician data says Kristen O'Hagan 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 Kristen O'Hagan see?
- In 2024, CMS data shows 218 Original Medicare patients and 245 services for Kristen O'Hagan. This counts Original Medicare only and measures volume, not quality.
- What is Kristen O'Hagan's NPI number?
- 1366601205. 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 Kristen O'Hagan, 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 | 218 |
|---|---|
| Services billed to Medicare | 245 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)152 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)66 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)11 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%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)61%
- Arthritis49%
- Anxiety45%
- Ischemic heart disease39%
Practice locations
Addresses where Kristen O'Hagan is enrolled with Medicare (CMS data updated October 2, 2026).
- 136 Mountain View BlvdBasking Ridge, NJ 07920
- 136 Mountainview BlvdBasking Ridge, NJ 07920 (908) 542‑3000
- 225 Summit AveMontvale, NJ 07645 (908) 542‑3336
- 500 Westchester AveWest Harrison, NY 10604 (212) 639‑2000
Group practices
Medicare enrollment lists Kristen O'Hagan as a member of these groups (CMS data updated October 2, 2026).
- MSK Bergen255 clinicians in the group
- Memorial Sloan Kettering Cancer Center at Basking Ridge New Jersey229 clinicians in the group
- MSK Harrison132 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Basking Ridge
Clinicians with the same Medicare primary specialty in Basking Ridge, NJ — not a recommendation.
Other clinicians in MSK Bergen
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366601205 |
| 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
- 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