Sarah S. Naik, MD
Internal Medicine Physician · Onalaska, WI
Sarah S. Naik, MD is an internal medicine physician with a practice address in Onalaska, Wisconsin, and NPI 1891797106, issued on Jun 1, 2005. Check the license (Wisconsin 40777, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Sarah S. Naik
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 40777 WI
Self-reported in NPPES; status is on the state search - Practice location
- 3111 Gundersen Drive, Onalaska, WI 54650
- Phone
- (608) 796-8630
- Enumerated
- Jun 1, 2005
- Record last updated
- Jun 2, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicaid ID
- 32582000 WI
- Medicare enrollment
- Enrolled (PECOS I20100618000858); accepts Medicare assignment
- Medical or professional school
- University Of Wooster Medical Department, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 3111 Gundersen Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Whitney Jandl, ATCAthletic Trainer1578981486
- Joseph La Mere, ATCAthletic Trainer1851385199
- Stephen Maden, PTPhysical Therapist1174527790
- Rajiv Naik, MDPediatrics Physician1902808215
- Ellen Ott, PNPPediatric Nurse Practitioner1710981154
- John Purdue, ODOptometrist1467456830
Verify Sarah S. Naik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 40777Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average internal medicine physician in 2024
6,827 Medicare Part D claims for 397 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 128 claims were for opioids.
Most prescribed
- Atorvastatin Calcium605 claims
- Levothyroxine Sodium282 claims
- Losartan Potassium258 claims
- Amlodipine Besylate245 claims
- Lisinopril236 claims
- Metoprolol Succinate200 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 2 group practices
- Gundersen Clinic LtdSparta, WI
- Gundersen Lutheran Medical Center IncLa Crosse, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sarah S. Naik among 2,078 internal medicine physician records in Wisconsin
Sarah S. Naik, MD is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1995 · median 2002 among the 1,098 with a school on file
- Record last updated2015 · 55% 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 Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 internal medicine physician records list a practice address in Onalaska
They are 13 of the 568 NPPES records with a practice address in Onalaska, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Onalaska → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jeffrey Addison, D.O.Onalaska, WI 546501295268571
- Steven Bowman, DOOnalaska, WI 546501851374284
- Gerlyn Brasic, MDOnalaska, WI 546501033104427
- John Herath, MDOnalaska, WI 546501740286913
- Teresa King, MDOnalaska, WI 546501619932639
- Amit Kulkarni, MDOnalaska, WI 546501710939996
- Kathryn Lynn, DOOnalaska, WI 546501922102037
- Tiffany Marinier, D.O.Onalaska, WI 546501144343161
Common questions
What is Sarah S. Naik, MD's NPI number?
Sarah S. Naik, MD's National Provider Identifier (NPI) is 1891797106, issued on Jun 1, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Sarah S. Naik, MD located?
The NPPES record lists a practice address at 3111 Gundersen Drive, Onalaska, WI, 54650. Phone: (608) 796-8630. Providers update this record themselves, so call before visiting.
How can I verify Sarah S. Naik, MD's license?
NPPES lists Wisconsin license number 40777, 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 Sarah S. Naik, MD prescribe under Medicare Part D?
In 2024, Sarah S. Naik, MD had 6,827 Medicare Part D claims for 397 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.