NPI registry status
Active
2026 NPPES data Gerontology Nurse Practitioner NPI 1144977935
Verify on CMS → Tierra Williams
Gerontology Nurse Practitioner in Chicago, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 9,706 in Gerontology 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
1K
Medicare Part D claims · 80 beneficiaries · Gerontology Nurse Practitioner avg: 1K
Generic prescribing
87%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Tierra Williams filed 1,187 Medicare Part D claims in 2023 as a Gerontology Nurse Practitioner in Chicago, Illinois, prescribing 87% generic.
- 1K
- Part D claims, 2023
- 87%
- generic prescribing
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.
Tierra Williams's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,187 Top 23% higher than 77% of 1,370,886 prescribers
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 Tierra Williams?
Quality data not reportedPrimary specialty
Gerontology Nurse Practitioner
Medicare Part D claims
1,187 7% vs specialty avg
Specialty distribution in Illinois
How Gerontology Nurse Practitioner compares to other specialties among Illinois 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 Gerontology 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).
Tierra Williams appears in the CMS NPPES registry as a Gerontology Nurse Practitioner provider at 2450 N CENTRAL AVE, Chicago, IL, 60639, with a listed phone of (773) 889-1333. NPI 1144977935 was issued on 03/02/2022.
Medicare Part D records for calendar year 2023 show 1,187 prescription claims written by this provider, covering 80 Medicare beneficiaries and totaling roughly $47K in drug spend, split 11% brand-name and 87% generic by claim count, with an opioid prescribing rate of 12.1%.
Gerontology Nurse Practitioner is a mid-sized specialty nationwide, with 9,706 enrolled providers across 54 states and an average of 1,283 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 | 1144977935 |
|---|---|
| Specialty | Gerontology Nurse Practitioner |
| Gender | Female |
| NPI Issued | 03/02/2022 |
Hospital and facility affiliations
Facilities where Tierra 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.
Vitae Health Medical Illinois, PLLC
Chicago, IL
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 - they are NOT specific to Tierra Williams. To verify Tierra Williams's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR 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 Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Tierra Williams - brand share 11.0%
Gerontology Nurse Practitioner average
11% brand-name claims vs 87% generic, on 1,187 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.
1,187
Total Claims
$47K
Total Drug Cost
80
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,187
- Total Day Supply
- 21,349
- Brand vs Generic
- 11% brand / 87% generic
- Brand Drug Cost
- $25K
- Generic Drug Cost
- $21K
- Opioid Claims
- 144 (12.1% rate)
- Antibiotic Claims
- 48
Patient Demographics
- Average Patient Age
- 65.9 years
- Avg HCC Risk Score
- 2.68
- Gender Split
- 45% female / 55% male
- Age Distribution
- <65: 38, 65-74: 24, 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 Tierra Williams prescribes most
Top Medicare Part D drugs by claim count, 2023
- Lorazepam
Lorazepam
147 claims
- Clonazepam
Clonazepam
101 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
82 claims
- Alprazolam
Alprazolam
64 claims
- Zolpidem Tartrate 52
Zolpidem Tartrate
52 claims
- Tramadol Hcl 47
Tramadol Hcl
47 claims
- Prednisone 38
Prednisone
38 claims
- Pregabalin 36
Pregabalin
36 claims
| Drug | Claims |
|---|---|
| Lorazepam | 147 |
| Clonazepam | 101 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 82 |
| Alprazolam | 64 |
| Zolpidem Tartrate | 52 |
| Tramadol Hcl | 47 |
| Prednisone | 38 |
| Pregabalin | 36 |
| Trulicity Dulaglutide | 22 |
| Atorvastatin Calcium | 20 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gerontology Nurse Practitioner Overview
How Tierra Williams fits within the Gerontology Nurse Practitioner landscape nationally.
9,706
Gerontology Nurse Practitioner Providers in US
54
States with Gerontology Nurse Practitioner
1,283
Avg Claims per Provider
Tierra Williams's 1,187 claims are below the specialty average of 1,283.
Nearby Gerontology Nurse Practitioner Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Williams.
Preethi Abraham
Chicago, IL
James Akindunbi
Flossmoor, IL
Dr. Amanda Allen
AGNP
Shiloh, IL
Faour Alshare
Rockford, IL
Binoy Andrews
Skokie, IL
Compare Gerontology 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 Illinois medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gerontology 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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Frequently Asked Questions
What is Tierra Williams's specialty? ▼
Tierra Williams specializes in Gerontology Nurse Practitioner and practices in Chicago, Illinois.
How much does Tierra Williams prescribe under Medicare Part D? ▼
In 2023, Tierra Williams wrote 1,187 Medicare Part D claims totaling $47K in drug costs for 80 beneficiaries.
Where is Tierra Williams located? ▼
Tierra Williams is located at 2450 N CENTRAL AVE, Chicago, IL, 60639. Phone: (773) 889-1333.
What is Tierra Williams's NPI number? ▼
Tierra Williams's National Provider Identifier (NPI) is 1144977935, issued on 03/02/2022.
Does Tierra Williams prescribe more brand-name or generic drugs? ▼
Tierra Williams's prescribing is 11% brand-name and 87% generic drugs by claim count, with $25K in brand drug costs.
Does Tierra Williams prescribe opioids? ▼
Yes, Tierra Williams had 144 opioid claims in 2023 with an opioid prescribing rate of 12.1%.
How many Gerontology Nurse Practitioner providers are there in the US? ▼
There are 9,706 Gerontology Nurse Practitioner providers across 54 states in the US. The average Gerontology Nurse Practitioner provider writes 1,283 Medicare Part D claims per year.
What drugs does Tierra Williams prescribe most often? ▼
Based on 2023 Medicare Part D data, Tierra Williams's most frequently prescribed drugs include Lorazepam, Clonazepam, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Tierra Williams accept Medicare? ▼
Tierra Williams appears in CMS Medicare data with 1,187 Part D claims and 80 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Tierra Williams's credentials? ▼
Tierra Williams's NPI is 1144977935. 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
Compiled from official public sources by the PlainDoctor editorial team.
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.