Katja K. Karrento, MD
Pediatric Gastroenterology Physician · Milwaukee, WI
Katja K. Karrento, MD is a pediatric gastroenterology physician with a practice address in Milwaukee, Wisconsin, and NPI 1609036391, issued on Jun 16, 2008. Check the license (Wisconsin 55831, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Katja K. Karrento
- Credential
- MD
- Primary taxonomy
- Pediatric Gastroenterology Physician 2080P0206X
- License number
- 55831 WI
Self-reported in NPPES; status is on the state search - Practice location
- 9000 W Wisconsin Ave, Milwaukee, WI 53226
- Phone
- (414) 266-3690
- Enumerated
- Jun 16, 2008
- Record last updated
- Aug 8, 2023
- Fax
- (414) 266-3676
- Medicaid ID
- 1609036391 WI
- Entity
- Type 1 · individual
8 nearest pediatric gastroenterology physician records → All 54 in Wisconsin → Look up another NPI →
Also registered at 9000 W Wisconsin Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lynn Abad-Santos, APNPPediatric Nurse Practitioner1184675696
- Steven AbramowskiPediatric Nurse Practitioner1871118802
- Thomas Abshire, MDPediatric Hematology & Oncology Physician1730249681
- Elham Abushanab, M.D.Neurology with Special Qualifications in Child Neurology Physician1306392634
- Samuel Adams, M.D.Neurology with Special Qualifications in Child Neurology Physician1972947224
- Adeleye Afolayan, M.DNeonatal-Perinatal Medicine Physician1760649776
Verify Katja K. Karrento in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 55831Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $1,750.00
1 payment: consulting fee; the largest payer was Takeda Pharmaceuticals U.S.A., Inc. The 1,184 providers of this specialty with any payment received $2,585.05 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Katja K. Karrento among 54 pediatric gastroenterology physician records in Wisconsin
Katja K. Karrento, MD is one of 54 pediatric gastroenterology physician records with a practice address in Wisconsin. 43% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 44% of them.
- NPI issued2008 · 44% of these records are older, 46% newer
- In a Medicare fileYes · 43% of these records are
- In the CMS Doctors and Clinicians fileNo · 20% of these records are
- Record last updated2023 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0206X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Gastroenterology Physician providers in Wisconsin
There are 54 pediatric gastroenterology physician records in Wisconsin.
All 54 in Wisconsin → Every provider in Milwaukee → Pediatric Gastroenterology Physician nationwide →
The 8 pediatric gastroenterology physician records with the nearest ZIP codes
- Farhat Ashai-Khan, MDMilwaukee, WI 532261326015090
- Ellen Blank, MDMilwaukee, WI 532261801847249
- Jose Cabrera, M.D.Milwaukee, WI 532261235330721
- Gisela Chelimsky, MDMilwaukee, WI 532261760491336
- Zahida Khan, M.D., PH.D.Milwaukee, WI 532261366616500
- Ulysses Li, MDMilwaukee, WI 532261952418097
- Cara Mack, MDMilwaukee, WI 532261083799720
- Alfonso Martinez, MDMilwaukee, WI 532261841243581
Common questions
What is Katja K. Karrento, MD's NPI number?
Katja K. Karrento, MD's National Provider Identifier (NPI) is 1609036391, issued on Jun 16, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Katja K. Karrento, MD located?
The NPPES record lists a practice address at 9000 W Wisconsin Ave, Milwaukee, WI, 53226. Phone: (414) 266-3690. Providers update this record themselves, so call before visiting.
How can I verify Katja K. Karrento, MD's license?
NPPES lists Wisconsin license number 55831, 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.