NPPES file of Aug 9, 2026

Michael E. Sullivan, M.D.

Family Medicine Physician · Watertown, WI

Michael E. Sullivan, M.D. is a family medicine physician with a practice address in Watertown, Wisconsin, and NPI 1093883142, issued on Nov 30, 2006. Check the license (Wisconsin 46656, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1093883142
Name
Michael E. Sullivan
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
46656 WI
Self-reported in NPPES; status is on the state search
Practice location
127 Hospital Dr, Watertown, WI 53098
Phone
(920) 261-8500
Enumerated
Nov 30, 2006
Record last updated
Apr 7, 2022
Medicaid ID
34560600 WI
Medicare enrollment
Enrolled (PECOS I20040701000385); accepts Medicare assignment
Medical or professional school
University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 2001
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family medicine physician records → All 3,765 in Wisconsin → Look up another NPI →

Also registered at 127 Hospital Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. John Basarich, MDFamily Medicine Physician1033178512
  2. Bruce Cochrane, M.D.Family Medicine Physician1922176064
  3. Melodie Defouw, APNPFamily Nurse Practitioner1881164481
  4. Alyssa Flagge, PA-CPhysician Assistant1356074512
  5. Frederick Gremmels, D.O.Family Medicine Physician1720156896
  6. Richard Holden, M.D.Family Medicine Physician1215005368

Verify Michael E. Sullivan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWisconsin Medical Examining Board
    Search for license 46656    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Wisconsin license search

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3.7 times the Medicare Part D claims of the average family medicine physician in 2024

13,095 Medicare Part D claims for 612 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 73 claims were for opioids.

  1. Michael Sullivan13,095
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium850 claims
  2. Levothyroxine Sodium443 claims
  3. Amlodipine Besylate374 claims
  4. Furosemide367 claims
  5. Lisinopril365 claims
  6. Losartan Potassium361 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

  1. Oak Medical SCMilwaukee, WI
  2. Watertown Family Practice Associates, SCWatertown, WI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Michael E. Sullivan among 3,765 family medicine physician records in Wisconsin

Michael E. Sullivan, M.D. is one of 3,765 family medicine physician records with a practice address in Wisconsin. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.

  • NPI issued2006 · 10% of these records are older, 46% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated2001 · median 2007 among the 2,347 with a school on file
  • Record last updated2022 · 56% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

13 family medicine physician records list a practice address in Watertown

They are 13 of the 366 NPPES records with a practice address in Watertown, and 3,765 family medicine physician records in Wisconsin.

All 3,765 in Wisconsin → Every provider in Watertown → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. John Basarich, MDWatertown, WI 530981033178512
  2. Bruce Cochrane, M.D.Watertown, WI 530981922176064
  3. Leslie Golden, MDWatertown, WI 530981336401736
  4. Frederick Gremmels, D.O.Watertown, WI 530981720156896
  5. Richard Holden, M.D.Watertown, WI 530981215005368
  6. Robert Legrow, M.D.Watertown, WI 530981013908771
  7. Anna Stamas, DOWatertown, WI 530981376172007
  8. Danielle Tonelli, DOWatertown, WI 530981083806814

Common questions

What is Michael E. Sullivan, M.D.'s NPI number?

Michael E. Sullivan, M.D.'s National Provider Identifier (NPI) is 1093883142, issued on Nov 30, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Michael E. Sullivan, M.D. located?

The NPPES record lists a practice address at 127 Hospital Dr, Watertown, WI, 53098. Phone: (920) 261-8500. Providers update this record themselves, so call before visiting.

How can I verify Michael E. Sullivan, M.D.'s license?

NPPES lists Wisconsin license number 46656, 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 Michael E. Sullivan, M.D. prescribe under Medicare Part D?

In 2024, Michael E. Sullivan, M.D. had 13,095 Medicare Part D claims for 612 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.