Dr. Warren Pierce , MD
Internal Medicine β’ Hoffman Estates, IL
2359 Hassell Rd
Hoffman Estates, IL 601692102
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. Warren Pierce is listed in NPPES under Internal Medicine.
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NPI assigned on September 22, 2005; this date does not establish years in practice.
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Published CMS data list 521 Medicare Part D prescriptions, including refills, in 2019.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2019. Published rows only; this is not a quality measure.
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Published Part D records, 2019:
- Levothyroxine Sodium β 59 prescription fills, including refills.
- Atorvastatin Calcium β 53 prescription fills, including refills.
- Amlodipine Besylate β 48 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2019. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 24 records in the table Β· Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 40,731 in 2015 to 521 in 2019.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2015β2019.
Practice Location & Contact Primary Location
2359 Hassell Rd
Hoffman Estates, IL 601692102
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.
30-day fills
529 standardized 30-day fills in 2019
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
$21,354 in 2019
The total cost of these prescriptions in 2019, 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 β by Provider and Drug, 2019.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019β2025.
NPI first issued
2005
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, βDoes your provider accept Medicare as full payment?β
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 Hoffman Estates and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Pierce are from 2019.
35 active clinicians are listed under Internal Medicine with a practice address in Hoffman Estates, IL (7,245 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Hoffman Estates
28.6% of these 35 clinicians have the CMS telehealth indicator.
65.7% of these 35 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 decreased 99% from 40,731 in 2015 to 521 in 2019.
- 2015: 40,731
- 2016: 41,450
- 2017: 7,144
- 2018: 1,656
- 2019: 521
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30-day fills
30-day fills decreased 99% from 54,957 in 2015 to 529 in 2019.
- 2015: 54,957
- 2016: 57,347
- 2017: 9,352
- 2018: 1,666
- 2019: 529
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Part D drug cost
Part D drug cost decreased 99% from $2,337,579 in 2015 to $21,354 in 2019.
- 2015: $2,337,579
- 2016: $2,345,699
- 2017: $358,735
- 2018: $78,071
- 2019: $21,354
Sources: CMS Medicare Part D Prescribers (2019), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2019.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Levothyroxine Sodium | Levothyroxine Sodium | 59 | 1,917 | $841.99 | β |
| Atorvastatin Calcium | Atorvastatin Calcium | 53 | 1,590 | $987.74 | β |
| Amlodipine Besylate | Amlodipine Besylate | 48 | 1,440 | $447.77 | β |
| Warfarin Sodium | Warfarin Sodium | 26 | 32 | $148.37 | β |
| Lisinopril | Lisinopril | 24 | 720 | $161.96 | β |
| Carbidopa-Levodopa | Carbidopa/Levodopa | 24 | 720 | $896.44 | β |
| Metoprolol Tartrate | Metoprolol Tartrate | 22 | 660 | $141.26 | β |
| Carvedilol | Carvedilol | 22 | 660 | $210.57 | β |
| Furosemide | Furosemide | 21 | 294 | $91.90 | β |
| Ipratropium-Albuterol | Ipratropium/Albuterol Sulfate | 19 | 95 | $355.87 | β |
| Finasteride | Finasteride | 18 | 540 | $240.28 | β |
| Januvia | Sitagliptin Phosphate | 17 | 238 | $4,002.04 | β |
| Gabapentin | Gabapentin | 16 | 480 | $162.94 | β |
| Clopidogrel | Clopidogrel Bisulfate | 16 | 480 | $453.76 | β |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 16 | 257 | $6,273.19 | β |
| Potassium Chloride | Potassium Chloride | 16 | 480 | $234.83 | β |
| Omeprazole | Omeprazole | 15 | 450 | $149.49 | β |
| Hydralazine Hcl | Hydralazine Hcl | 15 | 450 | $430.70 | β |
| Memantine Hcl | Memantine Hcl | 14 | 420 | $397.56 | β |
| Tradjenta | Linagliptin | 13 | 182 | $2,952.30 | β |
| Allopurinol | Allopurinol | 12 | 360 | $133.65 | β |
| Losartan Potassium | Losartan Potassium | 12 | 360 | $127.32 | β |
| Montelukast Sodium | Montelukast Sodium | 12 | 360 | $205.80 | β |
| Novolog Flexpen | Insulin Aspart | 11 | 280 | $1,306.32 | β |
Source: CMS Part D by Provider and Drug, 2019; 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.
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 - Gastroenterology
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner
Advanced Practice Nurse
Internal Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner - Adult Health
Advanced Practice Nurse
Internal Medicine - Gastroenterology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
NPI status registered as active in NPPES database
Registered at 2359 HASSELL RD, HOFFMAN ESTATES, IL 601692102 (Tel: 8478437030)
Registered at 2500 W HIGGINS RD, SUITE 505, HOFFMAN ESTATES, IL 60169 (Tel: 8478430806)
Recorded as WARREN PIERCE, MD
Internal Medicine (license number reported to NPPES: IL 036-059419)
NPI status registered as active in NPPES database
Registered at 1555 BARRINGTON ROAD, SUITE 2300A, HOFFMAN ESTATES, IL 601691057 (Tel: 8478437030)
Registered at 2500 W HIGGINS RD, SUITE 505, HOFFMAN ESTATES, IL 60169 (Tel: 8478430806)
Recorded as WARREN PIERCE, MD
Internal Medicine (license number reported to NPPES: IL 036-059419)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Hoffman Estates
- Dr. Mary George, MD
- Dr. Sunita Talwar, MD
- Dr. Geoffrey Sebastian, MD
- Yelena Shanchuk
- Dr. Lawrence Bergman, MD
- Dr. Peter Palermo, MD
Mailing Address
2500 W Higgins Rd, Suite 505
Hoffman Estates, IL 60169
Phone: 8478430806