Chiara Williams, APRN
NPI 1558827014 · Psychiatric/Mental Health Nurse Practitioner · St Petersburg, FL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chiara Williams, APRN is a Psychiatric/Mental Health Nurse Practitioner provider in St Petersburg, FL (NPI 1558827014).
Provider details
- NPI number
- 1558827014
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN
- Sex
- Female
- Sole proprietor
- Yes
- License
- APRN11001509 (FL)
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 tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
35 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 35 | $66 |
Typical Medicare-allowed amounts for these services range $66–$66 (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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Lorazepam | 32 |
| Trazodone Hcl | 32 |
| Lamotrigine | 30 |
| Clonidine Hcl | 15 |
| Lithium Carbonate | 15 |
| Risperidone | 15 |
| Clonazepam | 13 |
| Buspirone Hcl | 13 |
| Sertraline Hcl | 13 |
| Paroxetine Hcl | 12 |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,870 across 99 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 4024 Central AveSt Petersburg, FL 33711-1239Phone: (727) 327-7656
Registry dates
- Enumerated
- 2019-02-20
- Last updated
- 2023-03-07
Frequently asked questions
- What is Chiara Williams's NPI number?
- Chiara Williams's National Provider Identifier (NPI) is 1558827014, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chiara Williams's specialty?
- Chiara Williams is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Chiara Williams located?
- Chiara Williams's practice location on file with NPPES is 4010 Central Ave, St Petersburg, FL 33711-1239.
- What is Chiara Williams's phone number?
- The practice phone number listed in the NPPES registry for Chiara Williams is (727) 327-7656.
- Does Chiara Williams accept Medicare?
- Chiara Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chiara Williams's NPI active?
- Yes — Chiara Williams's NPI (1558827014) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.