Kathryn Williams, FNP-C
NPI 1144863945 · Family Nurse Practitioner · Portland, ME
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathryn Williams, FNP-C is a Family Nurse Practitioner provider in Portland, ME (NPI 1144863945).
Provider details
- NPI number
- 1144863945
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- CNP191283 (ME)
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
6 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
207 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 | 114 | $77 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 93 | $108 |
Typical Medicare-allowed amounts for these services range $77–$108 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Nirmatrelvir/Ritonavirbrand: Paxlovid | 182 | 180 |
| Doxycycline Hyclate | 55 | 53 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 40 | 40 |
| Prednisone | 27 | 25 |
| Azithromycin | 20 | 20 |
| Cephalexin | 16 | 16 |
| Triamcinolone Acetonide | 16 | 14 |
Practice location
Mailing address
Additional practice locations (2)
- 193 Bath RdBrunswick, ME 04011-2607Phone: (207) 424-2272
- 24 Miles Center WayDamariscotta, ME 04543-4067Phone: (207) 563-4250
Registry dates
- Enumerated
- 2019-10-24
- Last updated
- 2026-01-05
- Certified
- 2026-01-05
Frequently asked questions
- What is Kathryn Williams's NPI number?
- Kathryn Williams's National Provider Identifier (NPI) is 1144863945, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathryn Williams's specialty?
- Kathryn Williams is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kathryn Williams located?
- Kathryn Williams's practice location on file with NPPES is 22 Bramhall St, Portland, ME 04102-3134.
- What is Kathryn Williams's phone number?
- The practice phone number listed in the NPPES registry for Kathryn Williams is (207) 706-3280.
- Does Kathryn Williams accept Medicare?
- Kathryn Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathryn Williams's NPI active?
- Yes — Kathryn Williams's NPI (1144863945) is active in the NPPES registry as of the last update on 2026-01-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.