Nathaniel Seth Laden, M.D., M.S.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Milwaukee, WI
Nathaniel Seth Laden, M.D., M.S. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Milwaukee, Wisconsin, and NPI 1356316889, issued on Feb 20, 2006. Check the license (Wisconsin 18081, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Nathaniel Seth Laden
- Credential
- M.D., M.S.
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License numbers
- 18081 WI
35.071969L OH
Self-reported in NPPES; status is on the state search - Practice location
- 9200 W Wisconsin Ave, Milwaukee, WI 53226
- Phone
- (414) 955-6900
- Enumerated
- Feb 20, 2006
- Record last updated
- May 2, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (414) 955-6204
- Medicaid ID
- 2097065 OH
- Medicare enrollment
- Enrolled (PECOS I20160505000910); accepts Medicare assignment
- Medical or professional school
- University Of Toledo College Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 115 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.
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- Sameem Abedin, MDHematology & Oncology Physician1063641157
- Lolia Abibo, M.D.Hospitalist Physician1912359795
- Haisam Abid, MBBSHospitalist Physician1578083184
- Faith Abodunrin, MDHematology & Oncology Physician1437768769
Verify Nathaniel Seth Laden in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 18081Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 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).
Bills Medicare through one group practice
- Aspirus Wausau Hospital IncWausau, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathaniel Seth Laden among 115 thoracic surgery (cardiothoracic vascular surgery) physician records in Wisconsin
Nathaniel Seth Laden, M.D., M.S. is one of 115 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in Wisconsin. 78% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 40% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1988 · median 1993 among the 74 with a school on file
- Record last updated2016 · 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 208G00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in Wisconsin
There are 115 thoracic surgery (cardiothoracic vascular surgery) physician records in Wisconsin.
All 115 in Wisconsin → Every provider in Milwaukee → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Hossein Almassi, MDMilwaukee, WI 532261255382768
- Lucian Durham, M.D., PHDMilwaukee, WI 532261427036540
- Mario Gasparri, MDMilwaukee, WI 532261114971439
- George Haasler, MDMilwaukee, WI 532261275584096
- David Johnstone, M.D.Milwaukee, WI 532261366470627
- Lyle Joyce, MDMilwaukee, WI 532261598739229
- Takushi Kohmoto, MD PHDMilwaukee, WI 532261013971688
- S Litwin, M.D.Milwaukee, WI 532261497764831
Common questions
What is Nathaniel Seth Laden, M.D., M.S.'s NPI number?
Nathaniel Seth Laden, M.D., M.S.'s National Provider Identifier (NPI) is 1356316889, issued on Feb 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nathaniel Seth Laden, M.D., M.S. located?
The NPPES record lists a practice address at 9200 W Wisconsin Ave, Milwaukee, WI, 53226. Phone: (414) 955-6900. Providers update this record themselves, so call before visiting.
How can I verify Nathaniel Seth Laden, M.D., M.S.'s license?
NPPES lists Wisconsin license number 18081, 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.
What is Nathaniel Seth Laden, M.D., M.S.'s MIPS final 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), 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.