Dr. Stephen Pierson , MD
Internal Medicine • Wheaton, IL
1800 N Main St
Wheaton, IL 601873112
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. Stephen Pierson is listed in NPPES under Internal Medicine.
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NPI assigned on March 9, 2006; this date does not establish years in practice.
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Published CMS data list 336 Original Medicare Part B services in 2017.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017. Published rows only; this is not a quality measure.
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Published Part B service records, 2017:
- 36415 — Insertion of needle into vein for collection of blood sample: 110 service units.
- 83036 — Hemoglobin a1c level: 82 service units.
- 80053 — Blood test, comprehensive group of blood chemicals: 59 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2016 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2017). CPT notice
See all 6 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 1,063 Medicare Part D prescriptions, including refills, in 2017.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2017. Published rows only; this is not a quality measure.
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Published Part D records, 2017:
- Atorvastatin Calcium — 119 prescription fills, including refills.
- Levothyroxine Sodium — 90 prescription fills, including refills.
- Lovastatin — 88 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2017. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 35 records in the table · Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 5,178 in 2013 to 1,063 in 2017.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2013–2017.
Practice Location & Contact Primary Location
1800 N Main St
Wheaton, IL 601873112
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
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $3,323 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 – by Provider and Service, 2017.
Paid by Medicare
About $3,323 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 – by Provider and Service, 2017.
30-day fills
2,922 standardized 30-day fills in 2017
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
$36,292 in 2017
The total cost of these prescriptions in 2017, 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, 2017.
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 Wheaton and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Pierson are from 2017.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Pierson are from 2017.
20 active clinicians are listed under Internal Medicine with a practice address in Wheaton, IL (7,245 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Wheaton
70% of these 20 clinicians have the CMS telehealth indicator.
85% of these 20 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.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 79% from 5,178 in 2013 to 1,063 in 2017.
- 2013: 5,178
- 2014: 6,010
- 2015: 5,784
- 2016: 5,625
- 2017: 1,063
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30-day fills
30-day fills decreased 76% from 11,991 in 2013 to 2,922 in 2017.
- 2013: 11,991
- 2014: 14,194
- 2015: 14,307
- 2016: 14,523
- 2017: 2,922
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Part D drug cost
Part D drug cost decreased 88% from $294,537 in 2013 to $36,292 in 2017.
- 2013: $294,537
- 2014: $332,182
- 2015: $284,176
- 2016: $251,140
- 2017: $36,292
Sources: CMS Medicare Physician & Other Practitioners (2017), CMS Medicare Part D Prescribers (2017), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® 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 – 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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36415
Insertion of needle into vein for collection of blood sample
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110 | 101 | $20.00 | $2.94 |
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83036
Hemoglobin a1c level
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82 | 82 | $50.00 | $13.05 |
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80053
Blood test, comprehensive group of blood chemicals
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59 | 59 | $55.00 | $11.77 |
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80061
Blood test, lipids (cholesterol and triglycerides)
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51 | 51 | $69.00 | $14.15 |
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85025
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count
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21 | 21 | $40.00 | $10.45 |
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84443
Blood test, thyroid stimulating hormone (tsh)
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13 | 13 | $86.00 | $22.59 |
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.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2017.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 119 | 10,230 | $2,547.49 | 77 |
| Levothyroxine Sodium | Levothyroxine Sodium | 90 | 7,359 | $3,014.54 | 50 |
| Lovastatin | Lovastatin | 88 | 7,680 | $1,035.25 | 52 |
| Lisinopril | Lisinopril | 58 | 4,771 | $559.05 | 39 |
| Simvastatin | Simvastatin | 55 | 4,950 | $729.92 | 31 |
| Omeprazole | Omeprazole | 54 | 4,450 | $745.58 | 32 |
| Fluticasone Propionate | Fluticasone Propionate | 37 | 2,430 | $704.39 | 25 |
| Metoprolol Succinate | Metoprolol Succinate | 37 | 3,181 | $1,740.18 | 26 |
| Amlodipine Besylate | Amlodipine Besylate | 36 | 2,940 | $378.45 | 25 |
| Losartan Potassium | Losartan Potassium | 32 | 2,640 | $267.68 | 15 |
| Tamsulosin Hcl | Tamsulosin Hcl | 32 | 2,295 | $987.17 | 16 |
| Citalopram Hbr | Citalopram Hydrobromide | 30 | 2,520 | $300.82 | 21 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 30 | 2,700 | $280.81 | 18 |
| Amlodipine Besylate-Benazepril | Amlodipine Besylate/Benazepril | 28 | 2,520 | $1,406.77 | 16 |
| Finasteride | Finasteride | 26 | 2,337 | $489.15 | 13 |
| Januvia | Sitagliptin Phosphate | 24 | 1,230 | $14,661.07 | — |
| Metformin Hcl | Metformin Hcl | 24 | 2,100 | $317.22 | 21 |
| Irbesartan | Irbesartan | 22 | 1,560 | $518.32 | 13 |
| Enalapril Maleate | Enalapril Maleate | 19 | 1,298 | $595.98 | 11 |
| Allopurinol | Allopurinol | 18 | 1,620 | $381.92 | 12 |
| Glimepiride | Glimepiride | 18 | 1,620 | $240.60 | 15 |
| Potassium Chloride | Potassium Chloride | 18 | 1,500 | $701.63 | 12 |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 17 | 1,430 | $310.27 | 14 |
| Furosemide | Furosemide | 16 | 1,380 | $124.95 | 11 |
| Atenolol | Atenolol | 15 | 1,220 | $112.25 | — |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2017; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Additional State Medicaid & Healthcare Payer Identifiers
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Doctor of Osteopathic Medicine (D.O.)
Nurse Practitioner
Family Nurse Practitioner
Family Medicine - Geriatric Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated March 09, 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 Internal Medicine Providers in Wheaton
- Dr. Sonika Anand, MD
- Dr. Nadia Khan, MD
- Dr. Mathew Philip, MD
- Dr. Scott Kolbaba, MD
- Dr. Christopher Santi, MD
- Dr. James Scruggs, MD
Mailing Address
1860 Paysphere Cir
Chicago, IL 606740018
Phone: 6304699200