NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1518368166 PA-C
Verify on CMS → Erin Whitley, PA-C
Physician Assistant 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 150,974 in Physician Assistant, 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
878
Medicare Part D claims · 475 beneficiaries · Physician Assistant avg: 790
Generic prescribing
60%
generic claims · 40% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$180.31
5 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Erin Whitley, PA-C filed 878 Medicare Part D claims in 2023 as a Physician Assistant in Chicago, Illinois, prescribing 60% generic.
- 878
- Part D claims, 2023
- 60%
- generic prescribing
- $180.31
- industry payments (Sunshine Act)
- ≥73rd
- 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.
Erin Whitley, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
878 ≥ 73rd percentile 73% 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 Erin Whitley, PA-C?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
878 11% vs specialty avg
Specialty distribution in Illinois
How Physician Assistant 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 Physician Assistant. 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).
Erin Whitley, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 1725 W HARRISON ST STE 207, Chicago, IL, 60612, with a listed phone of (312) 942-5861. NPI 1518368166 was issued on 09/12/2014.
Medicare Part D records for calendar year 2023 show 878 prescription claims written by this provider, covering 475 Medicare beneficiaries and totaling roughly $221K in drug spend, split 40% brand-name and 60% generic by claim count.
Physician Assistant is a high-volume specialty nationwide, with 150,974 enrolled providers across 56 states and an average of 790 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 | 1518368166 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA-C |
| Gender | Female |
| NPI Issued | 09/12/2014 |
Hospital and facility affiliations
Facilities where Erin Whitley, PA-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.
Rush University Medical Group
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).
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 Erin Whitley, PA-C. Source: openpaymentsdata.cms.gov.
Total received
$180
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 - 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 Erin Whitley, PA-C. To verify Erin Whitley, PA-C'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 · Above average
Erin Whitley, PA-C - brand share 40.0%
Physician Assistant average
40% brand-name claims vs 60% generic, on 878 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.
878
Total Claims
$221K
Total Drug Cost
475
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,319
- Total Day Supply
- 27,847
- Brand vs Generic
- 40% brand / 60% generic
- Brand Drug Cost
- $197K
- Generic Drug Cost
- $24K
Patient Demographics
- Average Patient Age
- 70.0 years
- Avg HCC Risk Score
- 1.64
- Gender Split
- 64% female / 36% male
- Age Distribution
- <65: 90, 65-74: 249, 75-84: 121, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Erin Whitley, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Clenpiq
Clenpiq
127 claims
- Linzess
Linzess
97 claims
- Pantoprazole Sodium
Pantoprazole Sodium
92 claims
- Omeprazole
Omeprazole
76 claims
- Famotidine
Famotidine
53 claims
- Esomeprazole Magne… 39
Esomeprazole Magnesium
39 claims
- Peg3350-Sod Sul-Na… 29
Peg3350-Sod Sul-Nacl-Kcl-Asb-C
29 claims
- Hydrocortisone 18
Hydrocortisone
18 claims
| Drug | Claims |
|---|---|
| Clenpiq Sod Picosulf/Mag Ox/Citric Ac | 127 |
| Linzess Linaclotide | 97 |
| Pantoprazole Sodium | 92 |
| Omeprazole | 76 |
| Famotidine | 53 |
| Esomeprazole Magnesium | 39 |
| Peg3350-Sod Sul-Nacl-Kcl-Asb-C Peg3350/Sod Sul/Nacl/Kcl/Asb/C | 29 |
| Hydrocortisone | 18 |
| Ondansetron Odt Ondansetron | 15 |
| Trulance Plecanatide | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Erin Whitley, PA-C fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Erin Whitley, PA-C's 878 claims are above the specialty average of 790.
Nearby Physician Assistant Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Whitley.
Dr. Brooke Aarhus
PA-C
Park Ridge, IL
Dr. Traci Aaron
PA-C
Chicago, IL
Dr. Sana Abbasi
PA
Carol Stream, IL
Dr. Susan Abbinanti
PA-C
Elk Grove Village, IL
Dr. Katheryn Abbott
PA
Schaumburg, IL
Compare Physician Assistant 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 Physician Assistant 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.
Healthcare Guides
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Medical Specialties Explained
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Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
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Frequently Asked Questions
What is Erin Whitley, PA-C's specialty? ▼
Erin Whitley, PA-C specializes in Physician Assistant and practices in Chicago, Illinois. Credentials: PA-C.
How much does Erin Whitley, PA-C prescribe under Medicare Part D? ▼
In 2023, Erin Whitley, PA-C wrote 878 Medicare Part D claims totaling $221K in drug costs for 475 beneficiaries.
Where is Erin Whitley, PA-C located? ▼
Erin Whitley, PA-C is located at 1725 W HARRISON ST STE 207, Chicago, IL, 60612. Phone: (312) 942-5861.
What is Erin Whitley, PA-C's NPI number? ▼
Erin Whitley, PA-C's National Provider Identifier (NPI) is 1518368166, issued on 09/12/2014.
Does Erin Whitley, PA-C prescribe more brand-name or generic drugs? ▼
Erin Whitley, PA-C's prescribing is 40% brand-name and 60% generic drugs by claim count, with $197K in brand drug costs.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does Erin Whitley, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Erin Whitley, PA-C's most frequently prescribed drugs include Clenpiq, Linzess, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Erin Whitley, PA-C accept Medicare? ▼
Erin Whitley, PA-C appears in CMS Medicare data with 878 Part D claims and 475 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Erin Whitley, PA-C's credentials? ▼
Erin Whitley, PA-C's NPI is 1518368166 with credentials PA-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.