NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1003842964 D.O.
Verify on CMS → John Deforest, D.O.
Family Medicine Physician in Beecher, 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 150,125 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
14K
Medicare Part D claims · 764 beneficiaries · Family Medicine Physician avg: 4K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
14.8/100
▼ 69 pts below national avg 83.5 · Penalty band
Industry payments
$1.7K
87 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
John Deforest, D.O. reported a CMS MIPS final score of 14.8/100 - below the 83.5 national average - and filed 13,694 Medicare Part D claims in 2024.
- 14.8/100
- MIPS score · -69 vs avg
- 14K
- Part D claims, 2024
- 87%
- generic prescribing
- Likely
- board-certified (heuristic)
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 John Deforest, D.O.
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1003842964), first enumerated 06/23/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 13,694 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 14.8/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Industry payment transparency
$1.7K in reported industry payments (87 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
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not John Deforest, D.O.'s individual license status. Verify directly with the state medical board.
Source: IDFPR 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 1003842964 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · MIPS-LOW · RX-HEAVY · BOOK-MID · PHOTO-FINISH
- NPI-10 1003842964
- ENUM-LEGACY 2006
- TAX-MEGA 150K Family Medicine
- MIPS-LOW 14.8/100
- RX-HEAVY 14K claims
- BOOK-MID 5,925 in Illinois
- PHOTO-FINISH James Pfister · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Kelly Pitsenbarg…
Kelly Pitsenbarger
14.7 MIPS pts
- Deforest · this …
Deforest · this provider
14.8 MIPS pts
- Ked Davis · high…
Ked Davis
14.8 MIPS pts
- James Pfister · …
James Pfister
14.8 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
John Deforest, D.O.'s MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
15 ≥ 2nd percentile 2% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where John Deforest, D.O. sits
This provider among family medicine physician peers
Across the 21,266 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, John Deforest, D.O. writes more Part D claims than 95% of them and scores higher on MIPS quality than 2% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one family medicine physician peer from a representative sample of 60; the gold marker is John Deforest, D.O.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
John Deforest, D.O. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about John Deforest, D.O.?
Below national averagePrimary specialty
Family Medicine Physician
Medicare Part D claims
13,694 289% vs specialty avg
MIPS final score
14.8/100 68.7 pts vs avg
Specialty distribution in Illinois
How Family Medicine Physician compares to other specialties among Illinois providers
Medicare quality performance, MIPS
John Deforest, D.O.'s 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 14.8/100
- vs 83.5 national avg · 2023 performance year
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 | 1003842964 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 06/23/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
14.7843
Final Score
Measured-score avg: 83.5
0
Quality
49.281
Cost
Reporting: Individual
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 John Deforest, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$1.7K
Largest payer
AstraZeneca Pharmaceuticals LP
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 John Deforest, D.O.. To verify John Deforest, D.O.'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
John Deforest, D.O. - brand share 13.0%
Family Medicine Physician average
13% brand-name claims vs 87% generic, on 13,694 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.
13,694
Total Claims
$1.4M
Total Drug Cost
764
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 26,752.633
- Total Day Supply
- 771,777
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $1.2M
- Generic Drug Cost
- $182K
- Opioid Claims
- 400 (2.9% rate)
- Antibiotic Claims
- 381
Patient Demographics
- Average Patient Age
- 73.8 years
- Avg HCC Risk Score
- 0.98
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 55, 65-74: 402, 75-84: 199, 85+: 108
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What John Deforest, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
1,060 claims
- Levothyroxine Sodium
Levothyroxine Sodium
541 claims
- Metformin Hcl
Metformin Hcl
469 claims
- Lisinopril
Lisinopril
430 claims
- Amlodipine Besylate 399
Amlodipine Besylate
399 claims
- Hydrochlorothiazide 361
Hydrochlorothiazide
361 claims
- Pantoprazole Sodium 313
Pantoprazole Sodium
313 claims
- Metoprolol Succinate 306
Metoprolol Succinate
306 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 1,060 |
| Levothyroxine Sodium | 541 |
| Metformin Hcl | 469 |
| Lisinopril | 430 |
| Amlodipine Besylate | 399 |
| Hydrochlorothiazide | 361 |
| Pantoprazole Sodium | 313 |
| Metoprolol Succinate | 306 |
| Gabapentin | 270 |
| Simvastatin | 261 |
* 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 John Deforest, D.O. fits within the Family Medicine Physician landscape nationally.
150,125
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,519
Avg Claims per Provider
John Deforest, D.O.'s 13,694 claims are above the specialty average of 3,519.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Deforest, both outside Illinois so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (14.8 here).
Same NPPES enumeration year (2006)
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 Deforest.
One of 5,925 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 John Deforest, D.O.'s specialty? ▼
John Deforest, D.O. specializes in Family Medicine Physician and practices in Beecher, Illinois. Credentials: D.O..
How much does John Deforest, D.O. prescribe under Medicare Part D? ▼
In 2024, John Deforest, D.O. wrote 13,694 Medicare Part D claims totaling $1.4M in drug costs for 764 beneficiaries.
What is John Deforest, D.O.'s Medicare quality score? ▼
John Deforest, D.O. has a CMS MIPS Final Score of 14.8/100 (Quality: 0, Cost: 49.3). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is John Deforest, D.O. located? ▼
John Deforest, D.O. is located at 715 S DIXIE HWY, Beecher, IL, 60401. Phone: (708) 946-9330.
What is John Deforest, D.O.'s NPI number? ▼
John Deforest, D.O.'s National Provider Identifier (NPI) is 1003842964, issued on 06/23/2006.
Does John Deforest, D.O. prescribe more brand-name or generic drugs? ▼
John Deforest, D.O.'s prescribing is 13% brand-name and 87% generic drugs by claim count, with $1.2M in brand drug costs.
Does John Deforest, D.O. prescribe opioids? ▼
Yes, John Deforest, D.O. had 400 opioid claims in 2024 with an opioid prescribing rate of 2.9%.
How many Family Medicine Physician providers are there in the US? ▼
There are 150,125 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,519 Medicare Part D claims per year.
What drugs does John Deforest, D.O. prescribe most often? ▼
Based on 2024 Medicare Part D data, John Deforest, D.O.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Deforest, D.O. accept Medicare? ▼
John Deforest, D.O. appears in CMS Medicare data with 13,694 Part D claims and 764 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Deforest, D.O.'s credentials? ▼
John Deforest, D.O.'s NPI is 1003842964 with credentials D.O.. 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.