NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1215044367 M.D.
Verify on CMS → Jeffrey Parks, M.D.
Family Medicine Physician in Belleville, 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
16K
Medicare Part D claims · 962 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
84%
generic claims · 15% 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
Jeffrey Parks, M.D. filed 16,320 Medicare Part D claims in 2023 as a Family Medicine Physician in Belleville, Illinois, prescribing 84% generic.
- 16K
- Part D claims, 2023
- 84%
- 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.
Jeffrey Parks, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
16,320 Top 2% higher than 98% 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
✓
Board certification likely (heuristic, not verified)
Jeffrey Parks, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 3 hospital affiliations - 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 Jeffrey Parks, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
16,320 377% 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).
Jeffrey Parks, M.D. appears in the CMS NPPES registry as a Family Medicine Physician provider holding M.D. credentials at 4315 MEMORIAL DR, Belleville, IL, 62226, with a listed phone of (618) 767-7023. NPI 1215044367 was issued on 08/24/2006.
Medicare Part D records for calendar year 2023 show 16,320 prescription claims written by this provider, covering 962 Medicare beneficiaries and totaling roughly $1.4 million in drug spend, split 15% brand-name and 84% generic by claim count, with an opioid prescribing rate of 1.6%.
Family Medicine Physician is a high-volume specialty nationwide, with 147,760 enrolled providers across 56 states and an average of 3,418 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 | 1215044367 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/24/2006 |
Hospital and facility affiliations
Facilities where Jeffrey Parks, M.D. 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.
According to CMS billing records, Jeffrey Parks, M.D. is affiliated with 3 Medicare-billing facilities.
Fairview Heights Medical Group SC
Belleville, IL
Logan Primary Care Service Corp.
Herrin, IL
Southern Illinois Medical Services Nfp
Herrin, 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 Jeffrey Parks, M.D.. To verify Jeffrey Parks, M.D.'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
Jeffrey Parks, M.D. - brand share 15.0%
Family Medicine Physician average
15% brand-name claims vs 84% generic, on 16,320 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.
16,320
Total Claims
$1.4M
Total Drug Cost
962
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 24,770
- Total Day Supply
- 679,149
- Brand vs Generic
- 15% brand / 84% generic
- Brand Drug Cost
- $1.1M
- Generic Drug Cost
- $304K
- Opioid Claims
- 255 (1.6% rate)
- Antibiotic Claims
- 285
Patient Demographics
- Average Patient Age
- 77.1 years
- Avg HCC Risk Score
- 1.75
- Gender Split
- 62% female / 38% male
- Age Distribution
- <65: 83, 65-74: 304, 75-84: 314, 85+: 261
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Jeffrey Parks, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
743 claims
- Lisinopril
Lisinopril
552 claims
- Levothyroxine Sodium
Levothyroxine Sodium
519 claims
- Furosemide
Furosemide
486 claims
- Amlodipine Besylate
Amlodipine Besylate
478 claims
- Eliquis
Eliquis
451 claims
- Pantoprazole Sodium
Pantoprazole Sodium
444 claims
- Gabapentin
Gabapentin
443 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 743 |
| Lisinopril | 552 |
| Levothyroxine Sodium | 519 |
| Furosemide | 486 |
| Amlodipine Besylate | 478 |
| Eliquis Apixaban | 451 |
| Pantoprazole Sodium | 444 |
| Gabapentin | 443 |
| Potassium Chloride | 430 |
| Metformin Hcl | 418 |
* 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 Jeffrey Parks, M.D. 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
Jeffrey Parks, M.D.'s 16,320 claims are above the specialty average of 3,418.
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 Parks.
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 →
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 Family Medicine Physician 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 Jeffrey Parks, M.D.'s specialty? ▼
Jeffrey Parks, M.D. specializes in Family Medicine Physician and practices in Belleville, Illinois. Credentials: M.D..
How much does Jeffrey Parks, M.D. prescribe under Medicare Part D? ▼
In 2023, Jeffrey Parks, M.D. wrote 16,320 Medicare Part D claims totaling $1.4M in drug costs for 962 beneficiaries.
Where is Jeffrey Parks, M.D. located? ▼
Jeffrey Parks, M.D. is located at 4315 MEMORIAL DR, Belleville, IL, 62226. Phone: (618) 767-7023.
What is Jeffrey Parks, M.D.'s NPI number? ▼
Jeffrey Parks, M.D.'s National Provider Identifier (NPI) is 1215044367, issued on 08/24/2006.
Does Jeffrey Parks, M.D. prescribe more brand-name or generic drugs? ▼
Jeffrey Parks, M.D.'s prescribing is 15% brand-name and 84% generic drugs by claim count, with $1.1M in brand drug costs.
Does Jeffrey Parks, M.D. prescribe opioids? ▼
Yes, Jeffrey Parks, M.D. had 255 opioid claims in 2023 with an opioid prescribing rate of 1.6%.
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 Jeffrey Parks, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Jeffrey Parks, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jeffrey Parks, M.D. accept Medicare? ▼
Jeffrey Parks, M.D. appears in CMS Medicare data with 16,320 Part D claims and 962 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jeffrey Parks, M.D.'s credentials? ▼
Jeffrey Parks, M.D.'s NPI is 1215044367 with credentials M.D.. 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.