William Timothy Northquist
Internal Medicine β’ Plainfield, IN
1100 Southfield Dr Ste 1220
Plainfield, IN 461684499
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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William Northquist is listed in NPPES under Internal Medicine.
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NPI assigned on April 5, 2021; this date does not establish years in practice.
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Published CMS data list 65 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Pantoprazole Sodium β 17 prescription fills, including refills.
- Jardiance (Empagliflozin) β 13 prescription fills, including refills.
- Metoprolol Tartrate β 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 5 records in the table Β· Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 90% of clinicians listed under Internal Medicine in Plainfield, IN (2024, 11 clinicians with data). Median for this group: 3,807. Middle half: 1,245 to 6,910.
Fewer Part D prescriptions than 75% of clinicians listed under Internal Medicine in Indiana (2024, 1,374 clinicians with data). Median for this group: 405. Middle half: 78 to 5,780.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 12 in 2023 to 65 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2023β2024.
Practice Location & Contact Primary Location
1100 Southfield Dr Ste 1220
Plainfield, IN 461684499
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 2 distinct additional practice-address records in Brownsburg, IN; Indianapolis, IN. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Hendricks County Hospital. 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
Indiana University School Of Medicine
2021
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
79 standardized 30-day fills in 2024
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
$10,476 in 2024
The total cost of these prescriptions in 2024, 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, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019β2025.
Years since graduation
5 years (graduated 2021)
CMS Doctors and Clinicians data list 2021 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
2021
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, 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.
Enrolled in Medicare (PECOS)
William Northquist 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 William Northquist as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services 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 Plainfield and Indiana
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 90% of clinicians listed under Internal Medicine in Plainfield, IN (2024, 11 clinicians with data). Median for this group: 3,807. Middle half: 1,245 to 6,910.
Fewer Part D prescriptions than 75% of clinicians listed under Internal Medicine in Indiana (2024, 1,374 clinicians with data). Median for this group: 405. Middle half: 78 to 5,780.
Part D drug cost
A lower Part D drug cost than 80% of clinicians listed under Internal Medicine in Plainfield, IN (2024, 11 clinicians with data). Median for this group: $259,373. Middle half: $82,488 to $603,541.
A lower Part D drug cost than 60% of clinicians listed under Internal Medicine in Indiana (2024, 1,374 clinicians with data). Median for this group: $30,636. Middle half: $965 to $477,895.
12 active clinicians are listed under Internal Medicine with a practice address in Plainfield, IN (2,112 in Indiana).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Plainfield
8.3% of these 12 clinicians have the CMS telehealth indicator.
83.3% of these 12 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 2023 to 65 in 2024.
- 2023: 12
- 2024: 65
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30-day fills
30-day fills went from 14 in 2023 to 79 in 2024.
- 2023: 14
- 2024: 79
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Part D drug cost
Part D drug cost went from $56 in 2023 to $10,476 in 2024.
- 2023: $56
- 2024: $10,476
Sources: CMS Medicare Part D Prescribers (2024), 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 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Pantoprazole Sodium | Pantoprazole Sodium | 17 | 810 | $60.77 | β |
| Jardiance | Empagliflozin | 13 | 510 | $10,084.61 | β |
| Metoprolol Tartrate | Metoprolol Tartrate | 12 | 360 | $10.06 | β |
| Methocarbamol | Methocarbamol | 12 | 337 | $107.20 | β |
| Amitriptyline Hcl | Amitriptyline Hcl | 11 | 330 | $213.46 | β |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-08-19NUCC 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.
NUCC Taxonomy Code: 208000000X
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20250620002961
IN
8123428273
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
Hendricks County Hospital
1100 Southfield Dr, Plainfield, IN 461684499
Phone: 3178383443
Secondary Practice Locations
705 Riley Hospital Dr Rm 5837
Indianapolis, IN 462025109
Phone: 3179480003
1411 S Green St
Brownsburg, IN 461122049
Phone: 3178523600
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 Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Nurse Practitioner
Nurse Practitioner
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 1100 SOUTHFIELD DR STE 1220, PLAINFIELD, IN 461684499 (Tel: 3178383443)
Registered at 1100 SOUTHFIELD DR STE 1370, PLAINFIELD, IN 461684300 (Tel: 3178375566)
Pediatrics (license number reported to NPPES: IN 01096875A)
NPI status registered as active in NPPES database
Registered at 705 RILEY HOSPITAL DR RM 5837, INDIANAPOLIS, IN 462025109 (Tel: 3179480003)
Registered at 705 RILEY HOSPITAL DR RM 5837, INDIANAPOLIS, IN 462025109
Recorded as WILLIAM NORTHQUIST
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Plainfield
- Dr. John Kersteff, MD
- Dr. John Unison, MD
- Dr. Katharina Weber, MD
- Dr. Juan Mejia Garces, MD
- Lauren Schultz
- Dr. Sara Cook, MD
Mailing Address
1100 Southfield Dr Ste 1370
Plainfield, IN 461684300
Phone: 3178375566