William Timothy Northquist
Internal Medicine Physician · Plainfield, IN
William Timothy Northquist is an internal medicine physician with a practice address in Plainfield, Indiana, and NPI 1104405349, issued on Apr 5, 2021. Check the license (Indiana 01096875A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- William Timothy Northquist
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 01096875A IN
Self-reported in NPPES; status is on the state search - Practice location
- 1100 Southfield Dr Ste 1220, Plainfield, IN 46168
- Phone
- (317) 838-3443
- Enumerated
- Apr 5, 2021
- Record last updated
- Aug 19, 2025
- Fax
- (317) 838-3444
- Medicare enrollment
- Enrolled (PECOS I20250620002961); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,109 in Indiana → Look up another NPI →
Also registered at 1100 Southfield Dr Ste 1220
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jenna DelongFamily Nurse Practitioner1376900225
- Lisa Faust, NPNurse Practitioner1851804926
- Tyler Fromm, MDInternal Medicine Physician1104238435
- Kelly Glover, MDInternal Medicine Physician1952550667
- Danielle JacksonPhysician Assistant1770112179
- Katlin Purlee, PA-CPhysician Assistant1306458666
Verify William Timothy Northquist in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01096875ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
193 Medicare Part D claims for 27 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Pantoprazole Sodium17 claims
- Jardiance13 claims
- Methocarbamol12 claims
- Metoprolol Tartrate12 claims
- Amitriptyline Hcl11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Hendricks County HospitalPlainfield, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Timothy Northquist among 2,109 internal medicine physician records in Indiana
William Timothy Northquist is one of 2,109 internal medicine physician records with a practice address in Indiana. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 90% of them.
- NPI issued2021 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2021 · median 2005 among the 1,448 with a school on file
- Record last updated2025 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
12 internal medicine physician records list a practice address in Plainfield
They are 12 of the 692 NPPES records with a practice address in Plainfield, and 2,109 internal medicine physician records in Indiana.
All 2,109 in Indiana → Every provider in Plainfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Audrey Abell, M.D.Plainfield, IN 461681457346579
- Sara Cook, MDPlainfield, IN 461681588823694
- Linda Decesare, MDPlainfield, IN 461681083825202
- Vada Durr-Stein, MDPlainfield, IN 461681639365943
- Tyler Fromm, MDPlainfield, IN 461681104238435
- Kelly Glover, MDPlainfield, IN 461681952550667
- John Kersteff, M.D.Plainfield, IN 461681942295936
- Juan Mejia Garces, M.D.Plainfield, IN 461681679883771
Common questions
What is William Timothy Northquist's NPI number?
William Timothy Northquist's National Provider Identifier (NPI) is 1104405349, issued on Apr 5, 2021. An NPI identifies a provider in billing; it is not a license.
Where is William Timothy Northquist located?
The NPPES record lists a practice address at 1100 Southfield Dr Ste 1220, Plainfield, IN, 46168. Phone: (317) 838-3443. Providers update this record themselves, so call before visiting.
How can I verify William Timothy Northquist's license?
NPPES lists Indiana license number 01096875A, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Timothy Northquist prescribe under Medicare Part D?
In 2024, William Timothy Northquist had 193 Medicare Part D claims for 27 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.