Karen O'Neil, CNP
NPI 1659776144 · Adult Health Nurse Practitioner · Scituate, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen O'Neil, CNP is a Adult Health Nurse Practitioner provider in Scituate, MA (NPI 1659776144).
Provider details
- NPI number
- 1659776144
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CNP
- Sex
- Female
- Sole proprietor
- No
- License
- RN150071 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
856 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 338 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 335 | $118 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 88 | $85 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 45 | $61 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 33 | $166 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Calcitriol | 152 | 60 |
| Furosemide | 80 | 43 |
| Torsemide | 80 | 29 |
| Amlodipine Besylate | 50 | 20 |
| Lisinopril | 50 | 16 |
| Allopurinol | 46 | 11 |
| Famotidine | 38 | 15 |
| Spironolactone | 34 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-10-27
- Last updated
- 2014-10-27
Frequently asked questions
- What is Karen O'Neil's NPI number?
- Karen O'Neil's National Provider Identifier (NPI) is 1659776144, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen O'Neil's specialty?
- Karen O'Neil is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen O'Neil located?
- Karen O'Neil's practice location on file with NPPES is 5 Studley Royal Rd, Scituate, MA 02066-2042.
- What is Karen O'Neil's phone number?
- The practice phone number listed in the NPPES registry for Karen O'Neil is (781) 545-7368.
- Does Karen O'Neil accept Medicare?
- Karen O'Neil is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen O'Neil's NPI active?
- Yes — Karen O'Neil's NPI (1659776144) is active in the NPPES registry as of the last update on 2014-10-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.