Jonathan Gregory Tlachac, MD
Anesthesiology Physician · Grafton, WI
Jonathan Gregory Tlachac, MD is an anesthesiology physician with a practice address in Grafton, Wisconsin, and NPI 1629204078, issued on May 29, 2009. Check the license (Wisconsin 54241, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Jonathan Gregory Tlachac
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License numbers
- 54241 WI
MD436211 PA
Self-reported in NPPES; status is on the state search - Practice location
- 975 Port Washington RD, Grafton, WI 53024
- Phone
- (262) 329-2135
- Enumerated
- May 29, 2009
- Record last updated
- Oct 9, 2023
- Medicaid ID
- 100008639 WI
- Medicare enrollment
- Enrolled (PECOS I20100927001005); accepts Medicare assignment
- Medical or professional school
- University Of Utah School Of Medicine, 2005
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 1,313 in Wisconsin → Look up another NPI →
Also registered at 975 Port Washington RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hamid Afsari, D.O.Hospitalist Physician1053672048
- Muhammed Al-Fawakhiri, MDInternal Medicine Physician1942276613
- Beverly Altman, LMTMassage Therapist1447888789
- Claudia Altmann, MDInfectious Disease Physician1386691756
- Peter Andrew, AAAnesthesiologist Assistant1821704545
- Patrick AndrewsPhysical Therapist1689481962
Verify Jonathan Gregory Tlachac in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 54241Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Aurora Medical Group, Inc.Grafton, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan Gregory Tlachac among 1,313 anesthesiology physician records in Wisconsin
Jonathan Gregory Tlachac, MD is one of 1,313 anesthesiology 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 2009, is newer than 61% of them.
- NPI issued2009 · 61% of these records are older, 36% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2005 · median 2006 among the 872 with a school on file
- Record last updated2023 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 anesthesiology physician records list a practice address in Grafton
They are 21 of the 459 NPPES records with a practice address in Grafton, and 1,313 anesthesiology physician records in Wisconsin.
All 1,313 in Wisconsin → Every provider in Grafton → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Gena DermodyGrafton, WI 530241609141761
- Robert Fish, M.D.Grafton, WI 530241942292610
- Michael Hensien, MDGrafton, WI 530241346294956
- Igor Levin, M.D.Grafton, WI 530241376527895
- Andrew Nicoli, D.O.Grafton, WI 530241124280052
- Jennifer Niedfeldt, MDGrafton, WI 530241215943451
- Richard Paulsen, M.D.Grafton, WI 530241588735435
- Ali Sadeghi, M.D.Grafton, WI 530241114901345
Common questions
What is Jonathan Gregory Tlachac, MD's NPI number?
Jonathan Gregory Tlachac, MD's National Provider Identifier (NPI) is 1629204078, issued on May 29, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan Gregory Tlachac, MD located?
The NPPES record lists a practice address at 975 Port Washington RD, Grafton, WI, 53024. Phone: (262) 329-2135. Providers update this record themselves, so call before visiting.
How can I verify Jonathan Gregory Tlachac, MD's license?
NPPES lists Wisconsin license number 54241, 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.
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.