NPI registry status
Active
2026 NPPES data Nurse Practitioner NPI 1326371683 RN, MSN, FNP-C
Verify on CMS → Yvonne Williams, RN, MSN, FNP-C
Nurse Practitioner in Chula Vista, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 87,700 in Nurse Practitioner, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
78
Medicare Part D claims · 63 beneficiaries · Nurse Practitioner avg: 1K
Industry payments
$56.48
3 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Yvonne Williams, RN, MSN, FNP-C filed 78 Medicare Part D claims in 2023 as a Nurse Practitioner in Chula Vista, California.
- 78
- Part D claims, 2023
- $56.48
- industry payments (Sunshine Act)
- ≥0th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
CMS NPPES provider registry desk
NPI 1326371683 · Nurse Practitioner
NPI-10 · ENUM-MID · TAX-MEGA · RX-TRACE · BOOK-MID · PHOTO-ENUM
- NPI-10 1326371683
- ENUM-MID 2009
- TAX-MEGA 88K Nurse Practitioner
- RX-TRACE 78
- BOOK-MID 6,916 in California
- PHOTO-ENUM Regina Drake · 2009
Yvonne Williams, RN, MSN, FNP-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
78 ≥ 0th percentile 0% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Yvonne Williams, RN, MSN, FNP-C?
Quality data not reportedPrimary specialty
Nurse Practitioner
Medicare Part D claims
78 93% vs specialty avg
Specialty distribution in California
How Nurse Practitioner compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Nurse Practitioner. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1326371683 |
|---|---|
| Specialty | Nurse Practitioner |
| Credentials | RN, MSN, FNP-C |
| Gender | Female |
| NPI Issued | 09/17/2009 |
Hospital and facility affiliations
Facilities where Yvonne Williams, RN, MSN, FNP-C bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Scripps Health
Carlsbad, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Yvonne Williams, RN, MSN, FNP-C. Source: openpaymentsdata.cms.gov.
Total received
$56
Largest payer
Lilly USA, LLC
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Yvonne Williams, RN, MSN, FNP-C. To verify Yvonne Williams, RN, MSN, FNP-C's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
78
Total Claims
$754
Total Drug Cost
63
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 80
- Total Day Supply
- 1,146
- Generic Drug Cost
- $686
- Antibiotic Claims
- 33
Patient Demographics
- Average Patient Age
- 72.9 years
- Avg HCC Risk Score
- 1.27
- Gender Split
- 75% female / 25% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Fluticasone Propionate | 20 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nurse Practitioner Overview
How Yvonne Williams, RN, MSN, FNP-C fits within the Nurse Practitioner landscape nationally.
87,700
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,084
Avg Claims per Provider
Yvonne Williams, RN, MSN, FNP-C's 78 claims are below the specialty average of 1,084.
Nationwide Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Williams, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Nurse Practitioner Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Williams.
One of 6,916 Nurse Practitioner providers enrolled in California, 5 are shown here.
Dr. Barbara Aaronson
RN/NURSE PRACTITONER
Los Angeles, CA
Dr. Albert Aba
AGNP
San Francisco, CA
Venice Ababat
Colton, CA
Dr. Martha Ababneh
CNA
El Monte, CA
Dr. Chelsea Abad
CRNP, AGPCNP - BC
Duarte, CA
Compare Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is Yvonne Williams, RN, MSN, FNP-C's specialty? ▼
Yvonne Williams, RN, MSN, FNP-C specializes in Nurse Practitioner and practices in Chula Vista, California. Credentials: RN, MSN, FNP-C.
How much does Yvonne Williams, RN, MSN, FNP-C prescribe under Medicare Part D? ▼
In 2023, Yvonne Williams, RN, MSN, FNP-C wrote 78 Medicare Part D claims totaling $754 in drug costs for 63 beneficiaries.
Where is Yvonne Williams, RN, MSN, FNP-C located? ▼
Yvonne Williams, RN, MSN, FNP-C is located at 971 LANE AVE, Chula Vista, CA, 91914. Phone: (619) 502-7300.
What is Yvonne Williams, RN, MSN, FNP-C's NPI number? ▼
Yvonne Williams, RN, MSN, FNP-C's National Provider Identifier (NPI) is 1326371683, issued on 09/17/2009.
How many Nurse Practitioner providers are there in the US? ▼
There are 87,700 Nurse Practitioner providers across 56 states in the US. The average Nurse Practitioner provider writes 1,084 Medicare Part D claims per year.
What drugs does Yvonne Williams, RN, MSN, FNP-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Yvonne Williams, RN, MSN, FNP-C's most frequently prescribed drugs include Fluticasone Propionate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Yvonne Williams, RN, MSN, FNP-C accept Medicare? ▼
Yvonne Williams, RN, MSN, FNP-C appears in CMS Medicare data with 78 Part D claims and 63 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Yvonne Williams, RN, MSN, FNP-C's credentials? ▼
Yvonne Williams, RN, MSN, FNP-C's NPI is 1326371683 with credentials RN, MSN, FNP-C. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.