NPI registry status
Active
2026 NPPES data Adult Health Nurse Practitioner NPI 1538610001 ARNP
Verify on CMS → Robert Williams, ARNP
Adult Health Nurse Practitioner in Winter Haven, Florida.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 29,519 in Adult Health 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
15K
Medicare Part D claims · 865 beneficiaries · Adult Health Nurse Practitioner avg: 1K
Generic prescribing
88%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$102.75
6 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Robert Williams, ARNP filed 14,990 Medicare Part D claims in 2023 as an Adult Health Nurse Practitioner in Winter Haven, Florida, prescribing 88% generic.
- 15K
- Part D claims, 2023
- 88%
- generic prescribing
- $102.75
- industry payments (Sunshine Act)
- ≥98th
- 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.
Robert Williams, ARNP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
14,990 ≥ 98th percentile 98% 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 Robert Williams, ARNP?
Quality data not reportedPrimary specialty
Adult Health Nurse Practitioner
Medicare Part D claims
14,990 12× vs specialty avg
Specialty distribution in Florida
How Adult Health Nurse Practitioner compares to other specialties among Florida 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 Adult Health 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).
Robert Williams, ARNP appears in the CMS NPPES registry as an Adult Health Nurse Practitioner provider holding ARNP credentials at 550 POPE AVE NW STE 300, Winter Haven, FL, 33881, with a listed phone of (863) 299-2636. NPI 1538610001 was issued on 10/20/2016.
Medicare Part D records for calendar year 2023 show 14,990 prescription claims written by this provider, covering 865 Medicare beneficiaries and totaling roughly $1.1 million in drug spend, split 11% brand-name and 88% generic by claim count, with an opioid prescribing rate of 2.2%.
Adult Health Nurse Practitioner is a mid-sized specialty nationwide, with 29,519 enrolled providers across 55 states and an average of 1,201 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1538610001 |
|---|---|
| Specialty | Adult Health Nurse Practitioner |
| Credentials | ARNP |
| Gender | Male |
| NPI Issued | 10/20/2016 |
Hospital and facility affiliations
Facilities where Robert Williams, ARNP 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.
Appalachian Mountain Community Health Centers
Robbinsville, NC
Trinity Medical Physicians LLC
Winter Haven, FL
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 Robert Williams, ARNP. Source: openpaymentsdata.cms.gov.
Total received
$103
Largest payer
Abbott Laboratories
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 - Florida FLDOH 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 ~75K Florida medical licensees in 2023 - they are NOT specific to Robert Williams, ARNP. To verify Robert Williams, ARNP's current license status, search the FLDOH public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
480
Total board actions, Florida 2023
Across 467 cases
6.40
Actions per 1,000 licensees
Florida statewide rate
monetary fine
Most common action type
138 cases
FLDOH 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 Florida disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Robert Williams, ARNP - brand share 11.0%
Adult Health Nurse Practitioner average
11% brand-name claims vs 88% generic, on 14,990 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
14,990
Total Claims
$1.1M
Total Drug Cost
865
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 35,772
- Total Day Supply
- 1,043,627
- Brand vs Generic
- 11% brand / 88% generic
- Brand Drug Cost
- $863K
- Generic Drug Cost
- $210K
- Opioid Claims
- 325 (2.2% rate)
- Antibiotic Claims
- 476
Patient Demographics
- Average Patient Age
- 72.3 years
- Avg HCC Risk Score
- 1.79
- Gender Split
- 46% female / 54% male
- Age Distribution
- <65: 119, 65-74: 380, 75-84: 298, 85+: 68
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Robert Williams, ARNP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
837 claims
- Amlodipine Besylate
Amlodipine Besylate
584 claims
- Lisinopril
Lisinopril
544 claims
- Levothyroxine Sodium
Levothyroxine Sodium
512 claims
- Losartan Potassium
Losartan Potassium
474 claims
- Omeprazole
Omeprazole
414 claims
- Gabapentin
Gabapentin
397 claims
- Hydrochlorothiazide
Hydrochlorothiazide
397 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 837 |
| Amlodipine Besylate | 584 |
| Lisinopril | 544 |
| Levothyroxine Sodium | 512 |
| Losartan Potassium | 474 |
| Omeprazole | 414 |
| Gabapentin | 397 |
| Hydrochlorothiazide | 397 |
| Metformin Hcl | 365 |
| Metoprolol Tartrate | 315 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Adult Health Nurse Practitioner Overview
How Robert Williams, ARNP fits within the Adult Health Nurse Practitioner landscape nationally.
29,519
Adult Health Nurse Practitioner Providers in US
55
States with Adult Health Nurse Practitioner
1,201
Avg Claims per Provider
Robert Williams, ARNP's 14,990 claims are above the specialty average of 1,201.
Nearby Adult Health Nurse Practitioner Providers in Florida
Other clinicians with the same primary specialty enrolled in Florida, drawn from the same CMS NPPES roster as Williams.
Dr. Brian Abaroa
NP
Miami, FL
Dr. Melinda Aberman
ARNP
Miami, FL
Dr. Irene Aboyme
ARNP
Kissimmee, FL
Dr. Martha Abrahams
ARNP
Hialeah, FL
Dinara Abubakirova
Bradenton, FL
Compare Adult Health Nurse Practitioner nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Florida medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Adult Health Nurse Practitioner peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Medical Specialties Explained
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How insurance networks affect your costs
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Frequently Asked Questions
What is Robert Williams, ARNP's specialty? ▼
Robert Williams, ARNP specializes in Adult Health Nurse Practitioner and practices in Winter Haven, Florida. Credentials: ARNP.
How much does Robert Williams, ARNP prescribe under Medicare Part D? ▼
In 2023, Robert Williams, ARNP wrote 14,990 Medicare Part D claims totaling $1.1M in drug costs for 865 beneficiaries.
Where is Robert Williams, ARNP located? ▼
Robert Williams, ARNP is located at 550 POPE AVE NW STE 300, Winter Haven, FL, 33881. Phone: (863) 299-2636.
What is Robert Williams, ARNP's NPI number? ▼
Robert Williams, ARNP's National Provider Identifier (NPI) is 1538610001, issued on 10/20/2016.
Does Robert Williams, ARNP prescribe more brand-name or generic drugs? ▼
Robert Williams, ARNP's prescribing is 11% brand-name and 88% generic drugs by claim count, with $863K in brand drug costs.
Does Robert Williams, ARNP prescribe opioids? ▼
Yes, Robert Williams, ARNP had 325 opioid claims in 2023 with an opioid prescribing rate of 2.2%.
How many Adult Health Nurse Practitioner providers are there in the US? ▼
There are 29,519 Adult Health Nurse Practitioner providers across 55 states in the US. The average Adult Health Nurse Practitioner provider writes 1,201 Medicare Part D claims per year.
What drugs does Robert Williams, ARNP prescribe most often? ▼
Based on 2023 Medicare Part D data, Robert Williams, ARNP's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Robert Williams, ARNP accept Medicare? ▼
Robert Williams, ARNP appears in CMS Medicare data with 14,990 Part D claims and 865 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert Williams, ARNP's credentials? ▼
Robert Williams, ARNP's NPI is 1538610001 with credentials ARNP. 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.