NPPES file of Aug 9, 2026

Kathleen Lynn Lak, M.D.

Surgery Physician · Milwaukee, WI

Kathleen Lynn Lak, M.D. is a surgery physician with a practice address in Milwaukee, Wisconsin, and NPI 1578852620, issued on Mar 29, 2011. Check the license (Wisconsin 59950, 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 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1578852620
Name
Kathleen Lynn Lak
Credential
M.D.
Primary taxonomy
Surgery Physician 208600000X
License number
59950 WI
Self-reported in NPPES; status is on the state search
Practice location
9200 W Wisconsin Ave, Milwaukee, WI 53226
Phone
(414) 805-5700
Enumerated
Mar 29, 2011
Record last updated
Sep 13, 2017 (not updated in 9 years: call before relying on the address or phone)
Fax
(414) 454-0152
Medicaid ID
1578852620 WI
Medicare enrollment
Enrolled (PECOS I20160707000877); accepts Medicare assignment
Medical or professional school
Medical College Of Wisconsin, 2011
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 surgery physician records → All 726 in Wisconsin → Look up another NPI →

Also registered at 9200 W Wisconsin Ave

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

  1. Shameem Aadam, RPHPharmacist1760755680
  2. Abubaker Abdalla, MDHospitalist Physician1194187617
  3. Sameem Abedin, MDHematology & Oncology Physician1063641157
  4. Lolia Abibo, M.D.Hospitalist Physician1912359795
  5. Haisam Abid, MBBSHospitalist Physician1578083184
  6. Faith Abodunrin, MDHematology & Oncology Physician1437768769

Verify Kathleen Lynn Lak in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWisconsin Medical Examining Board
    Search for license 59950    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through 2 group practices

  1. Froedtert Andthe Medical College OF Wisconsin Community Physicians IncOak Creek, WI
  2. The Medical College OF Wisconsin IncMilwaukee, WI

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

Kathleen Lynn Lak among 726 surgery physician records in Wisconsin

Kathleen Lynn Lak, M.D. is one of 726 surgery physician records with a practice address in Wisconsin. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 65% of them.

  • NPI issued2011 · 65% of these records are older, 32% newer
  • In a Medicare fileYes · 72% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated2011 · median 2006 among the 446 with a school on file
  • Record last updated2017 · 52% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Surgery Physician providers in Wisconsin

There are 726 surgery physician records in Wisconsin.

All 726 in Wisconsin → Every provider in Milwaukee → Surgery Physician nationwide →

The 8 surgery physician records with the nearest ZIP codes

  1. Kathleen Christians, MDMilwaukee, WI 532261477504884
  2. Gregory Ekbom, MDMilwaukee, WI 532261326163304
  3. Matthew Goldblatt, MDMilwaukee, WI 532261790771517
  4. Jon Gould, MDMilwaukee, WI 532261538120449
  5. Christopher Johnson, MDMilwaukee, WI 532261528010329
  6. Kirk Ludwig, M.D.Milwaukee, WI 532261750465803
  7. Mary Otterson, MDMilwaukee, WI 532261255385001
  8. Philip Redlich, MDMilwaukee, WI 532261548211014

Common questions

What is Kathleen Lynn Lak, M.D.'s NPI number?

Kathleen Lynn Lak, M.D.'s National Provider Identifier (NPI) is 1578852620, issued on Mar 29, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Kathleen Lynn Lak, M.D. located?

The NPPES record lists a practice address at 9200 W Wisconsin Ave, Milwaukee, WI, 53226. Phone: (414) 805-5700. Providers update this record themselves, so call before visiting.

How can I verify Kathleen Lynn Lak, M.D.'s license?

NPPES lists Wisconsin license number 59950, 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.

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.