Kathleen Alfonso, FNP
NPI 1225894926 · Family Nurse Practitioner · Bay Shore, NY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathleen Alfonso, FNP is a Family Nurse Practitioner provider in Bay Shore, NY (NPI 1225894926).
Provider details
- NPI number
- 1225894926
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- F353661-01 (NY)
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
2 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
17 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 17 | $88 |
Typical Medicare-allowed amounts for these services range $88–$88 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2024-02-21
- Last updated
- 2024-02-21
- Certified
- 2024-02-21
Frequently asked questions
- What is Kathleen Alfonso's NPI number?
- Kathleen Alfonso's National Provider Identifier (NPI) is 1225894926, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathleen Alfonso's specialty?
- Kathleen Alfonso is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kathleen Alfonso located?
- Kathleen Alfonso's practice location on file with NPPES is 301 E Main St, Bay Shore, NY 11706-8408.
- What is Kathleen Alfonso's phone number?
- The practice phone number listed in the NPPES registry for Kathleen Alfonso is (631) 968-3000.
- Does Kathleen Alfonso accept Medicare?
- Kathleen Alfonso is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathleen Alfonso's NPI active?
- Yes — Kathleen Alfonso's NPI (1225894926) is active in the NPPES registry as of the last update on 2024-02-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.