Dr. John C Workman , DDS
Dentist - General Practice • Glen Ellyn, IL
45 S Park Blvd, Suite 190
Glen Ellyn, IL 60137
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. John Workman is listed in NPPES under Dentist - General Practice.
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NPI assigned on September 20, 2006; this date does not establish years in practice.
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Published CMS data list 12 Medicare Part D prescriptions, including refills, in 2018.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2018. Published rows only; this is not a quality measure.
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Published Part D records, 2018:
- Amoxicillin — 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2018. 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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Medicare Part D prescriptions went from 12 in 2013 to 12 in 2018.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2013–2018.
Practice Location & Contact Primary Location
45 S Park Blvd
Suite 190
Glen Ellyn, IL 60137
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Dentist - General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
12 standardized 30-day fills in 2018
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
$80 in 2018
The total cost of these prescriptions in 2018, 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, 2018.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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.
Compared with the same specialty in Glen Ellyn and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Workman are from 2018.
28 active clinicians are listed under Dentist - General Practice with a practice address in Glen Ellyn, IL (5,281 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Glen Ellyn
0% of these 28 clinicians have the CMS telehealth indicator.
0% of these 28 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 D prescriptions
Medicare Part D prescriptions went from 12 in 2013 to 12 in 2018.
- 2013: 12
- 2016: 15
- 2017: 18
- 2018: 12
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30-day fills
30-day fills went from 12 in 2013 to 12 in 2018.
- 2013: 12
- 2016: 15
- 2017: 18
- 2018: 12
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Part D drug cost
Part D drug cost went from $83 in 2013 to $80 in 2018.
- 2013: $83
- 2016: $104
- 2017: $117
- 2018: $80
Sources: CMS Medicare Part D Prescribers (2018), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2018.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Amoxicillin | Amoxicillin | 12 | 112 | $80.08 | — |
Source: CMS Part D by Provider and Drug, 2018; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 1223G0001X
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Dentist - Periodontics
Doctor of Dental Surgery
Dentist - General Practice
Doctor of Dental Surgery
Dentist - Endodontics
Doctor of Dental Surgery, MSD
Dentist - General Practice
Doctor of Dental Surgery
Ophthalmology
Doctor of Medicine (M.D.)
Psychologist - Clinical
Doctor of Psychology (Psy.D.)
Career & Practice History
NPI enumerated September 20, 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 Dentist - General Practices in Glen Ellyn
- Dr. Katherine Borello, DDS
- Dr. Robin Jungblut, DDS
- Dr. Donald Kipper, DDS
- Dr. Danielle Kerger, DDS
- Dr. Paul Doodes, DDS, PhD
- Dr. Kelsey Esposito, DMD
Mailing Address
45 S Park Blvd, Suite 190
Glen Ellyn, IL 60137
Phone: 6304963558