2026 NPPES data Psychiatric/Mental Health Registered Nurse NPI 1194215798
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ANNALILY WILLIAMS

Psychiatric/Mental Health Registered Nurse in MONCKS CORNER, South Carolina. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
622
Medicare Part D claims · 62 beneficiaries · Psychiatric/Mental Health Registered Nurse avg: 893
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.1K
82 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

ANNALILY WILLIAMS filed 622 Medicare Part D claims in 2023 as a Psychiatric/Mental Health Registered Nurse in MONCKS CORNER, South Carolina, prescribing 91% generic.

622
Part D claims, 2023
91%
generic prescribing
$1.1K
industry payments (Sunshine Act)

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.

ANNALILY WILLIAMS's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

622 Top 31% higher than 69% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). This entry sits in this band. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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.

Source CMS Medicare Part D Prescriber Public Use File · 2023

What does the federal data show about ANNALILY WILLIAMS?

Quality data not reported

NPI registry status

Active

Issued 05/18/2018

NPI 1194215798

Primary specialty

Psychiatric/Mental Health Registered Nurse

Mid-sized

11,711 US NPIs in this specialty

Medicare Part D claims

622 30% vs specialty avg

2023 prescription claims

Specialty avg: 893

Specialty distribution in South Carolina

How Psychiatric/Mental Health Registered Nurse compares to other specialties among South Carolina providers

South Carolina providers

Psychiatric/Mental Health Registered Nurse share within South Carolina

1. Psychiatric/Mental Health Registered Nurse42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Psychiatric/Mental Health Registered Nurse share within South Carolina

Specialty board-certification context

Estimated specialty board-certified rate — Psychiatric/Mental Health Registered Nurse (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Psychiatric/Mental Health Registered Nurse ABMS/AOA estimate

Est. board-certified rate (Psychiatric/Mental Health Registered Nurse) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Psychiatric/Mental Health Registered Nurse) — ABMS / AOA estimate

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).

ANNALILY WILLIAMS appears in the CMS NPPES registry as a Psychiatric/Mental Health Registered Nurse provider at 403 STONY LANDING RD, MONCKS CORNER, SC, 29461, with a listed phone of (843) 761-8282. NPI 1194215798 was issued on 05/18/2018. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WILLIAMS most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 622 prescription claims written by this provider, covering 62 Medicare beneficiaries and totaling roughly $216K in drug spend, split 9% brand-name and 91% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Psychiatric/Mental Health Registered Nurse is a mid-sized specialty nationwide, with 11,711 enrolled providers across 54 states and an average of 893 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

403 STONY LANDING RD
MONCKS CORNER, SC 29461

Provider Details

NPI 1194215798
Specialty Psychiatric/Mental Health Registered Nurse
Gender Female
NPI Issued 05/18/2018

Hospital and facility affiliations

Facilities where ANNALILY WILLIAMS 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.

CH SPECIALTY SERVICES SC LLC
NORTH CHARLESTON, SC
CURANA HEALTH OF SOUTH CAROLINA PC
NORTH CHARLESTON, SC
TANDEM HEALTH SC
SUMTER, SC

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 ANNALILY WILLIAMS. Source: openpaymentsdata.cms.gov.

Total received

$1.1K

Largest payer

Neurocrine Biosciences, 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.

Brand vs generic prescribing mix · Generic-heavy

ANNALILY WILLIAMS — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 622 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.

622
Total Claims
$216K
Total Drug Cost
62
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
963
Total Day Supply
28,502
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$200K
Generic Drug Cost
$16K

Patient Demographics

Average Patient Age
56.6 years
Avg HCC Risk Score
1.48
Gender Split
77% female / 23% male
Age Distribution
<65: 40, 65-74: 20, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What ANNALILY WILLIAMS prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Gabapentin
46
Sertraline Hcl
44
Buspirone Hcl
43
Fluoxetine Hcl
35
Aripiprazole
34
Quetiapine Fumarate
33
Hydroxyzine Hcl
31
Lamotrigine
31
Trazodone Hcl
31
Bupropion Xl
Bupropion Hcl
18

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Psychiatric/Mental Health Registered Nurse Overview

How ANNALILY WILLIAMS fits within the Psychiatric/Mental Health Registered Nurse landscape nationally.

11,711
Psychiatric/Mental Health Registered Nurse Providers in US
54
States with Psychiatric/Mental Health Registered Nurse
893
Avg Claims per Provider

ANNALILY WILLIAMS's 622 claims are below the specialty average of 893.

Nearby Psychiatric/Mental Health Registered Nurse Providers in South Carolina

Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as WILLIAMS.

Compare Psychiatric/Mental Health Registered Nurse nationally: see state-by-state distribution →

Frequently Asked Questions

What is ANNALILY WILLIAMS's specialty?
ANNALILY WILLIAMS specializes in Psychiatric/Mental Health Registered Nurse and practices in MONCKS CORNER, South Carolina.
How much does ANNALILY WILLIAMS prescribe under Medicare Part D?
In 2023, ANNALILY WILLIAMS wrote 622 Medicare Part D claims totaling $216K in drug costs for 62 beneficiaries.
Where is ANNALILY WILLIAMS located?
ANNALILY WILLIAMS is located at 403 STONY LANDING RD, MONCKS CORNER, SC, 29461. Phone: (843) 761-8282.
What is ANNALILY WILLIAMS's NPI number?
ANNALILY WILLIAMS's National Provider Identifier (NPI) is 1194215798, issued on 05/18/2018.
Does ANNALILY WILLIAMS prescribe more brand-name or generic drugs?
ANNALILY WILLIAMS's prescribing is 9% brand-name and 91% generic drugs by claim count, with $200K in brand drug costs.
How many Psychiatric/Mental Health Registered Nurse providers are there in the US?
There are 11,711 Psychiatric/Mental Health Registered Nurse providers across 54 states in the US. The average Psychiatric/Mental Health Registered Nurse provider writes 893 Medicare Part D claims per year.
What drugs does ANNALILY WILLIAMS prescribe most often?
Based on 2023 Medicare Part D data, ANNALILY WILLIAMS's most frequently prescribed drugs include Gabapentin, Sertraline Hcl, Buspirone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ANNALILY WILLIAMS accept Medicare?
ANNALILY WILLIAMS appears in CMS Medicare data with 622 Part D claims and 62 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ANNALILY WILLIAMS's credentials?
ANNALILY WILLIAMS's NPI is 1194215798. 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

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