William Johnston, MD
Family Medicine Physician · Mosinee, WI
William Johnston, MD is a family medicine physician with a practice address in Mosinee, Wisconsin, and NPI 1427017789, issued on Mar 23, 2006. Check the license (Wisconsin 48123, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- William Johnston
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 48123 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1881 Highway XX, Mosinee, WI 54455
- Phone
- (715) 355-4040
- Enumerated
- Mar 23, 2006
- Entity
- Type 1 · individual
Also registered at 1881 Highway XX
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth Barr, MDFamily Medicine Physician1528093903
- Kristy Brown, APNPNurse Practitioner1316960610
- William Nietert, MDFamily Medicine Physician1255357042
- Susan Schneider, MDFamily Medicine Physician1447264098
- Lori Schutte, APNPNurse Practitioner1093734642
- David Tange, MDInternal Medicine Physician1598781262
Verify William Johnston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 48123Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
3.0 times the Medicare Part D claims of the average family medicine physician in 2024
10,669 Medicare Part D claims for 778 beneficiaries, against an average of 3,519 among the 111,126 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 394 claims were for opioids.
Most prescribed
- Atorvastatin Calcium727 claims
- Lisinopril508 claims
- Amlodipine Besylate462 claims
- Metoprolol Succinate396 claims
- Omeprazole313 claims
- Tamsulosin Hcl255 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.
The practice group's Medicare quality score for 2023: 83.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $225.26
2 payments, mostly travel and lodging; the largest payer was Ethicon Inc.. The 53,013 providers of this specialty with any payment received $861.30 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital or facility affiliation
- Aspirus Medical Group, Inc.Weston, WI
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
8 family medicine physician records list a Mosinee practice address
They are 8 of the 75 NPPES records with a Mosinee practice address, and 3,629 family medicine physician records in Wisconsin.
All 8 in Mosinee → All 3,629 in Wisconsin → Every provider in Mosinee →
Other family medicine physician records in Wisconsin
- Ghudran Abdulal, MDNew Berlin, WI1083622666
- Vanessa Abejuela-Matt, D.O.Mount Pleasant, WI1558687749
- Benjamin Abeyta, M.D.Wauwatosa, WI1447511597
- Emily Abeyta, MDWaukesha, WI1386905107
- Islam Abo Al Nadie, MDMilwaukee, WI1326618786
- Jeanette Abraham, MDWeston, WI1205895810
- Sarada Abraham, M.D.Oconomowoc, WI1962851972
- Kirsten Abramson, MDMadison, WI1417909979
- Alexandra Adams, MD PHDMadison, WI1184689291
- David AdamsMadison, WI1992986897
Common questions
What is William Johnston, MD's NPI number?
William Johnston, MD's National Provider Identifier (NPI) is 1427017789, issued on Mar 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Johnston, MD located?
The NPPES record lists a practice address at 1881 Highway XX, Mosinee, WI, 54455. Phone: (715) 355-4040. Providers update this record themselves, so call before visiting.
How can I verify William Johnston, MD's license?
NPPES lists Wisconsin license number 48123, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Johnston, MD prescribe under Medicare Part D?
In 2024, William Johnston, MD had 10,669 Medicare Part D claims for 778 beneficiaries; the average among family medicine physician prescribers was 3,519. Part D covers Medicare prescriptions only.
What is William Johnston, MD's Medicare quality score?
The 2023 MIPS final score is 83.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.