NPI registry status
Active
2026 NPPES data Primary Care Nurse Practitioner NPI 1558651323 APRN
Verify on CMS → Regina Williamson, APRN
Primary Care Nurse Practitioner in Chillicothe, Ohio.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,597 in Primary Care 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
2K
Medicare Part D claims · 58 beneficiaries · Primary Care Nurse Practitioner avg: 1K
Generic prescribing
82%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$323.99
23 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Regina Williamson, APRN filed 1,522 Medicare Part D claims in 2024 as a Primary Care Nurse Practitioner in Chillicothe, Ohio, prescribing 82% generic.
- 2K
- Part D claims, 2024
- 82%
- generic prescribing
- $323.99
- industry payments (Sunshine Act)
- ≥81st
- 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.
Federal trust snapshot
What official records show about Regina Williamson, APRN
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1558651323), first enumerated 04/14/2011.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,522 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Industry payment transparency
$323.99 in reported industry payments (23 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Ohio statewide board action statistics are published annually — these figures describe aggregate state activity, not Regina Williamson, APRN's individual license status. Verify directly with the state medical board.
Source: OMB annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1558651323 · Primary Care Nurse Practitioner
NPI-10 · ENUM-MID · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1558651323
- ENUM-MID 2011
- TAX-MID 11K Primary Care
- RX-MID 1,522
- BOOK-THIN 471 in Ohio
- PHOTO-ENUM Jamie Chiles, ANP · 2011
Regina Williamson, APRN's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,522 ≥ 81st percentile 81% of 1,416,883 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 · 2024
What does the federal data show about Regina Williamson, APRN?
Quality data not reportedPrimary specialty
Primary Care Nurse Practitioner
Medicare Part D claims
1,522 3% vs specialty avg
Specialty distribution in Ohio
How Primary Care Nurse Practitioner compares to other specialties among Ohio 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 Primary Care 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 | 1558651323 |
|---|---|
| Specialty | Primary Care Nurse Practitioner |
| Credentials | APRN |
| Gender | Female |
| NPI Issued | 04/14/2011 |
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 Regina Williamson, APRN. Source: openpaymentsdata.cms.gov.
Total received
$324
Largest payer
ABBVIE INC.
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 - Ohio OMB 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 ~48K Ohio medical licensees in 2023 - they are NOT specific to Regina Williamson, APRN. To verify Regina Williamson, APRN's current license status, search the OMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
158
Total board actions, Ohio 2023
Across 154 cases
3.29
Actions per 1,000 licensees
Ohio statewide rate
probation
Most common action type
56 cases
OMB 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 Ohio disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Regina Williamson, APRN - brand share 16.0%
Primary Care Nurse Practitioner average
16% brand-name claims vs 82% generic, on 1,522 2024 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 2024.
1,522
Total Claims
$288K
Total Drug Cost
58
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,031.133
- Total Day Supply
- 88,673
- Brand vs Generic
- 16% brand / 82% generic
- Brand Drug Cost
- $260K
- Generic Drug Cost
- $28K
- Opioid Claims
- 58 (3.8% rate)
- Antibiotic Claims
- 43
Patient Demographics
- Average Patient Age
- 61.3 years
- Avg HCC Risk Score
- 1.52
- Gender Split
- 60% female / 40% male
- Age Distribution
- <65: 22, 65-74: 30, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Regina Williamson, APRN prescribes most
Top Medicare Part D drugs by claim count, 2024
- Omeprazole
Omeprazole
60 claims
- Atorvastatin Calcium
Atorvastatin Calcium
49 claims
- Amlodipine Besylate
Amlodipine Besylate
47 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
44 claims
- Bupropion Xl
Bupropion Xl
40 claims
- Lisinopril
Lisinopril
36 claims
- Metoprolol Succinate
Metoprolol Succinate
36 claims
- Pregabalin
Pregabalin
35 claims
| Drug | Claims |
|---|---|
| Omeprazole | 60 |
| Atorvastatin Calcium | 49 |
| Amlodipine Besylate | 47 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 44 |
| Bupropion Xl Bupropion Hcl | 40 |
| Lisinopril | 36 |
| Metoprolol Succinate | 36 |
| Pregabalin | 35 |
| Gabapentin | 34 |
| Trazodone Hcl | 34 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Primary Care Nurse Practitioner Overview
How Regina Williamson, APRN fits within the Primary Care Nurse Practitioner landscape nationally.
10,597
Primary Care Nurse Practitioner Providers in US
54
States with Primary Care Nurse Practitioner
1,471
Avg Claims per Provider
Regina Williamson, APRN's 1,522 claims are above the specialty average of 1,471.
Nationwide Primary Care Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Williamson, both outside Ohio so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2011)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Primary Care Nurse Practitioner Providers in Ohio
Other clinicians with the same primary specialty enrolled in Ohio, drawn from the same CMS NPPES roster as Williamson.
One of 471 Primary Care Nurse Practitioner providers enrolled in Ohio, 5 are shown here.
Nargis Abdelmessih
APRN/CNP
Richmond Hts, OH
Synthia Abekah
MSN, APRN, FNP-C
Dublin, OH
Margaret Achampong
Cincinnati, OH
Taiwo Adebayo
N.P
Peebles, OH
Qadra Aden
Newark, OH
Compare Primary Care Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is Regina Williamson, APRN's specialty? ▼
Regina Williamson, APRN specializes in Primary Care Nurse Practitioner and practices in Chillicothe, Ohio. Credentials: APRN.
How much does Regina Williamson, APRN prescribe under Medicare Part D? ▼
In 2024, Regina Williamson, APRN wrote 1,522 Medicare Part D claims totaling $288K in drug costs for 58 beneficiaries.
Where is Regina Williamson, APRN located? ▼
Regina Williamson, APRN is located at 72 N PLAZA BLVD, Chillicothe, OH, 45601. Phone: (740) 851-4400.
What is Regina Williamson, APRN's NPI number? ▼
Regina Williamson, APRN's National Provider Identifier (NPI) is 1558651323, issued on 04/14/2011.
Does Regina Williamson, APRN prescribe more brand-name or generic drugs? ▼
Regina Williamson, APRN's prescribing is 16% brand-name and 82% generic drugs by claim count, with $260K in brand drug costs.
Does Regina Williamson, APRN prescribe opioids? ▼
Yes, Regina Williamson, APRN had 58 opioid claims in 2024 with an opioid prescribing rate of 3.8%.
How many Primary Care Nurse Practitioner providers are there in the US? ▼
There are 10,597 Primary Care Nurse Practitioner providers across 54 states in the US. The average Primary Care Nurse Practitioner provider writes 1,471 Medicare Part D claims per year.
What drugs does Regina Williamson, APRN prescribe most often? ▼
Based on 2024 Medicare Part D data, Regina Williamson, APRN's most frequently prescribed drugs include Omeprazole, Atorvastatin Calcium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Regina Williamson, APRN accept Medicare? ▼
Regina Williamson, APRN appears in CMS Medicare data with 1,522 Part D claims and 58 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Regina Williamson, APRN's credentials? ▼
Regina Williamson, APRN's NPI is 1558651323 with credentials APRN. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.