NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1679572630 DO
Verify on CMS → Karen Will, DO
Family Medicine Physician in Tinley Park, 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 147,760 in Family Medicine Physician, 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
5K
Medicare Part D claims · 441 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Karen Will, DO filed 5,442 Medicare Part D claims in 2023 as a Family Medicine Physician in Tinley Park, Illinois, prescribing 91% generic.
- 5K
- Part D claims, 2023
- 91%
- generic prescribing
- ≥94th
- 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.
CMS NPPES provider registry desk
NPI 1679572630 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1679572630
- ENUM-LEGACY 2005
- TAX-MEGA 148K Family Medicine
- RX-MID 5,442
- BOOK-MID 5,817 in Illinois
- PHOTO-ENUM Betty Walker-Richard… · 2005
Karen Will, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
5,442 ≥ 94th percentile 94% 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
◑
Board-eligible specialty (heuristic, not verified)
Karen Will, DO practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Karen Will, DO?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
5,442 59% vs specialty avg
Specialty distribution in Illinois
How Family Medicine Physician 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 Family Medicine Physician. 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 | 1679572630 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | DO |
| Gender | Female |
| NPI Issued | 07/20/2005 |
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 Karen Will, DO. To verify Karen Will, DO'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 · Generic-heavy
Karen Will, DO - brand share 9.0%
Family Medicine Physician average
9% brand-name claims vs 91% generic, on 5,442 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.
5,442
Total Claims
$229K
Total Drug Cost
441
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 13,350
- Total Day Supply
- 390,169
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $104K
- Generic Drug Cost
- $124K
- Opioid Claims
- 58 (1.1% rate)
- Antibiotic Claims
- 136
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 0.91
- Age Distribution
- <65: 23, 65-74: 271, 75-84: 112, 85+: 35
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Karen Will, DO prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
457 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
245 claims
- Atorvastatin Calcium
Atorvastatin Calcium
231 claims
- Amlodipine Besylate
Amlodipine Besylate
205 claims
- Lisinopril
Lisinopril
197 claims
- Escitalopram Oxalate 169
Escitalopram Oxalate
169 claims
- Losartan Potassium 138
Losartan Potassium
138 claims
- Hydrochlorothiazide 136
Hydrochlorothiazide
136 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 457 |
| Rosuvastatin Calcium | 245 |
| Atorvastatin Calcium | 231 |
| Amlodipine Besylate | 205 |
| Lisinopril | 197 |
| Escitalopram Oxalate | 169 |
| Losartan Potassium | 138 |
| Hydrochlorothiazide | 136 |
| Metformin Hcl | 134 |
| Pravastatin Sodium | 127 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Karen Will, DO fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Karen Will, DO's 5,442 claims are above the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Will, both outside Illinois so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Will.
One of 5,817 Family Medicine Physician providers enrolled in Illinois, 5 are shown here.
Dr. Jon Aagaard
MD
Wheaton, IL
Dr. Napoleon Abando
MD
Woodstock, IL
Dr. Nikka Abaricia
MD
Chicago, IL
Mohemmed Abbas
Chicago, IL
Muhammad Abbas
Alton, IL
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Karen Will, DO's specialty? ▼
Karen Will, DO specializes in Family Medicine Physician and practices in Tinley Park, Illinois. Credentials: DO.
How much does Karen Will, DO prescribe under Medicare Part D? ▼
In 2023, Karen Will, DO wrote 5,442 Medicare Part D claims totaling $229K in drug costs for 441 beneficiaries.
Where is Karen Will, DO located? ▼
Karen Will, DO is located at 18210 LA GRANGE RD, Tinley Park, IL, 60477. Phone: (708) 479-6636.
What is Karen Will, DO's NPI number? ▼
Karen Will, DO's National Provider Identifier (NPI) is 1679572630, issued on 07/20/2005.
Does Karen Will, DO prescribe more brand-name or generic drugs? ▼
Karen Will, DO's prescribing is 9% brand-name and 91% generic drugs by claim count, with $104K in brand drug costs.
Does Karen Will, DO prescribe opioids? ▼
Yes, Karen Will, DO had 58 opioid claims in 2023 with an opioid prescribing rate of 1.1%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Karen Will, DO prescribe most often? ▼
Based on 2023 Medicare Part D data, Karen Will, DO's most frequently prescribed drugs include Levothyroxine Sodium, Rosuvastatin Calcium, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Karen Will, DO accept Medicare? ▼
Karen Will, DO appears in CMS Medicare data with 5,442 Part D claims and 441 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Karen Will, DO's credentials? ▼
Karen Will, DO's NPI is 1679572630 with credentials DO. 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.