Dr. David Charles , PhD
Clinical Neuropsychologist โข Algonquin, IL
1451 Merchant Dr
Algonquin, IL 601025917
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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Dr. David Charles is listed in NPPES under Clinical Neuropsychologist.
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NPI assigned on September 15, 2016; this date does not establish years in practice.
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Published CMS data list 235 Original Medicare Part B services in 2017.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2017. Published rows only; this is not a quality measure.
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Published Part B service records, 2017:
- 96118 โ Neuropsychological testing, interpretation, and report by psychologist or physician per hour: 143 service units.
- 90834 โ Psychotherapy: 70 service units.
- 90791 โ Psychiatric diagnostic evaluation: 22 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2017. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2016 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2017). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
Practice Location & Contact Primary Location
1451 Merchant Dr
Algonquin, IL 601025917
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 7 distinct additional practice-address records in Barrington, IL; Chicago, IL; Deerfield, IL and 4 more. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Thomson Memory Center Llc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2016
What Public CMS Data Show
Clinical Neuropsychologist: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $21,855 in 2017
The total amount Medicare approved for these services in 2017. 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 โ by Provider and Service, 2017.
Paid by Medicare
About $17,029 in 2017
The part of the Medicare-allowed amount that Medicare itself paid in 2017, 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 โ by Provider and Service, 2017.
Years since graduation
10 years (graduated 2016)
CMS Doctors and Clinicians data list 2016 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
2016
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, โDoes your provider accept Medicare as full payment?โ
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. Charles 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.
Can order Medicare-covered services
CMS lists Dr. Charles as eligible to order or refer Medicare Part B clinical laboratory and imaging services and durable medical equipment (DME) for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Algonquin and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Charles are from 2017.
13 active clinicians are listed under Clinical Neuropsychologist with a practice address in Algonquin, IL (248 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Algonquin
84.6% of these 13 clinicians have the CMS telehealth indicator.
76.9% of these 13 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
CMS data for Medicare Part B services are available for 2017 only.
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Medicare-allowed amount
CMS data for Medicare-allowed amount are available for 2017 only.
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Paid by Medicare
CMS data for Medicare payment amount are available for 2017 only.
Sources: CMS Medicare Physician & Other Practitioners (2017), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016 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 โ by Provider and Service data, 2017; 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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96118
Neuropsychological testing, interpretation, and report by psychologist or physician per hour
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143 | 18 | $250.00 | $93.06 |
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90834
Psychotherapy, 45 minutes
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70 | 11 | $160.00 | $82.25 |
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90791
Psychiatric diagnostic evaluation
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22 | 22 | $250.00 | $126.83 |
Source: CMS Part B by Provider and Service, 2017; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-09-23NUCC Taxonomy Code: 103G00000X
A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - CLINICAL PSYCHOLOGIST
I20241211001304
IL
6406136670
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Thomson Memory Center Llc
2604 Dempster St, Park Ridge, IL 600688428
Phone: 8474697537
Secondary Practice Locations
1531 S Grove Ave Unit 105
Barrington, IL 600105250
Phone: 8474697537
420 Lake Cook Rd Ste 112
Deerfield, IL 600154914
Phone: 8474697537
2551 N Clark St Ste 200
Chicago, IL 606141798
Phone: 8474697537
2300 N Barrington Rd Ste 105
Hoffman Estates, IL 601692033
Phone: 8474697537
2604 Dempster St Ste 407b
Park Ridge, IL 600688428
Phone: 8474697537
17w662 Butterfield Rd Ste 302
Oakbrook Terrace, IL 601814006
Phone: 8474697537
1603 Orrington Ave Ste 600
Evanston, IL 602013860
Phone: 8474697537
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Clinical Neuropsychologist
Doctor of Philosophy (Ph.D.)
Clinical Neuropsychologist
Doctor of Psychology (Psy.D.)
Clinical Neuropsychologist
Doctor of Philosophy (Ph.D.)
Social Worker - Clinical
Licensed Clinical Social Worker
Clinical Neuropsychologist
Doctor of Psychology (Psy.D.)
Clinical Neuropsychologist
Doctor of Psychology (Psy.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 1451 MERCHANT DR, ALGONQUIN, IL 601025917 (Tel: 8474697537)
Registered at 1451 MERCHANT DR, ALGONQUIN, IL 601025917 (Tel: 8474697537)
Clinical Neuropsychologist (license number reported to NPPES: IL 071.011321)
NPI status registered as active in NPPES database
Registered at 421 BENJAMIN LN STE 202, LOUISVILLE, KY 402224845 (Tel: 5026908024)
Registered at PO BOX 2257, CHESTERTON, IN 463040357 (Tel: 2199268320)
Recorded as DAVID CHARLES, PHD
Psychologist (license number reported to NPPES: KY 2864)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Clinical Neuropsychologists in Algonquin
- Dr. Nickolas Armstrong, PsyD
- Dr. Arina Polevoy, PsyD
- Dr. Christina Blodgett, PhD
- Dr. Holly Hagen, PsyD
- Dr. Sharlet Anderson, PhD
Mailing Address
1451 Merchant Dr
Algonquin, IL 601025917
Phone: 8474697537