Dr. Mark E Fredrick , DC
Chiropractor • Gurnee, IL
3930 West Washington Street, Ste B
Gurnee, IL 600315702
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on July 14, 2006; this date does not establish years in practice.
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Published CMS data list 467 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 98941 — Chiropractic manipulative treatment, 3-4 spinal regions: 467 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Published CMS data list 12 Medicare Part D prescriptions, including refills, in 2014.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2014. Published rows only; this is not a quality measure.
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Published Part D records, 2014:
- Gabapentin — 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2014. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Close to the middle for Medicare Part B services among clinicians listed under Chiropractor in Illinois (2024, 1,442 clinicians with data). Median for this group: 387. Middle half: 209 to 694.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 416 in 2020 to 467 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
3930 West Washington Street
Ste B
Gurnee, IL 600315702
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
National College Of Chiropractic
1983
What Public CMS Data Show
Chiropractor: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
38 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $18,512 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $13,688 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
12 standardized 30-day fills in 2014
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$118 in 2014
The total cost of these prescriptions in 2014, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2014.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $16.37 in 2025
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2025.
Years since graduation
43 years (graduated 1983)
CMS Doctors and Clinicians data list 1983 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Fredrick has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Gurnee and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Close to the middle for clinicians listed under Chiropractor in Illinois (2024, 1,442 clinicians with data). Median for this group: 387. Middle half: 209 to 694.
Too few clinicians listed under Chiropractor in Gurnee have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 60% of clinicians listed under Chiropractor in Illinois (2024, 1,442 clinicians with data). Median for this group: $13,829. Middle half: $7,198 to $25,147.
Too few clinicians listed under Chiropractor in Gurnee have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 60% of clinicians listed under Chiropractor in Illinois (2024, 1,442 clinicians with data). Median for this group: $9,800. Middle half: $5,094 to $18,000.
Too few clinicians listed under Chiropractor in Gurnee have Medicare Part B data for 2024 to compare.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Fredrick are from 2014.
14 active clinicians are listed under Chiropractor with a practice address in Gurnee, IL (4,525 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Gurnee
0% of these 14 clinicians have the CMS telehealth indicator.
35.7% of these 14 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 12% from 416 in 2020 to 467 in 2024.
- 2020: 416
- 2021: 430
- 2022: 608
- 2023: 427
- 2024: 467
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Medicare-allowed amount
Medicare-allowed amount varied from year to year: $17,738 in 2020 and $18,512 in 2024.
- 2020: $17,738
- 2021: $17,953
- 2022: $24,934
- 2023: $17,345
- 2024: $18,512
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Paid by Medicare
Paid by Medicare increased 11% from $12,276 in 2020 to $13,688 in 2024.
- 2020: $12,276
- 2021: $13,257
- 2022: $17,510
- 2023: $11,900
- 2024: $13,688
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Medicare Part D prescriptions
CMS data for Part D prescriptions are available for 2014 only.
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30-day fills
CMS data for 30-day fills are available for 2014 only.
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Part D drug cost
CMS data for Part D drug cost are available for 2014 only.
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $17.64 in 2022 to $16.37 in 2025.
- 2022: $17.64
- 2024: $2,945.00
- 2025: $16.37
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2014), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $16.37.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| INTERNATIONAL REHABILITATIVE SCIENCES, INC |
Food and Beverage
Cash or cash equivalent
|
RS-4i Plus with Intersperse | General | $16.37 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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98941
Chiropractic manipulative treatment, 3-4 spinal regions
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467 | 38 | $50.00 | $39.64 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2014.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Gabapentin | Gabapentin | 12 | 360 | $117.70 | — |
Source: CMS Part D by Provider and Drug, 2014; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 111N00000X
A provider qualified by a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal column and its interrelationship with other body systems.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - CHIROPRACTIC
I20101101001161
IL
0840484085
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Career & Practice History
NPI enumerated July 14, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Chiropractors in Gurnee
- Dr. Jonathan Haigh, DC
- Dr. Vincent Seiler, DC
- Dr. Nathanial Clark, DC
- Dr. Jean Alexis, DC
- Dr. Kari Crawford, DC
- Dr. Sean Walker, DC
Mailing Address
3930 West Washington Street, Ste B
Gurnee, IL 600315702
Phone: 8476621600