Serene Williams-Kasili, FNP-BC
NPI 1144696675 · Family Nurse Practitioner · Chelmsford, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Serene Williams-Kasili, FNP-BC is a Family Nurse Practitioner provider in Chelmsford, MA (NPI 1144696675).
Provider details
- NPI number
- 1144696675
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- RN276978 (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
10 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
780 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 | 124 | $73 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 100 | $89 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 92 | $9 |
| Detection Test By Immunoassay With Direct Visual Observation for Influenza Virus87804 | 54 | $16 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 51 | $93 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Nirmatrelvir/Ritonavirbrand: Paxlovid | 29 | 29 |
| Atorvastatin Calcium | 25 | 12 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 22 | 18 |
| Prednisone | 22 | 22 |
| Doxycycline Monohydrate | 21 | 20 |
| Fluticasone Propionate | 18 | 16 |
| Lorazepam |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-08-19
- Last updated
- 2015-08-19
Frequently asked questions
- What is Serene Williams-Kasili's NPI number?
- Serene Williams-Kasili's National Provider Identifier (NPI) is 1144696675, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Serene Williams-Kasili's specialty?
- Serene Williams-Kasili is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Serene Williams-Kasili located?
- Serene Williams-Kasili's practice location on file with NPPES is 35 Village Square, Chelmsford, MA 01824.
- What is Serene Williams-Kasili's phone number?
- The practice phone number listed in the NPPES registry for Serene Williams-Kasili is (978) 250-9495.
- Does Serene Williams-Kasili accept Medicare?
- Serene Williams-Kasili is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Serene Williams-Kasili's NPI active?
- Yes — Serene Williams-Kasili's NPI (1144696675) is active in the NPPES registry as of the last update on 2015-08-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.