Katja Karrento, MD
NPI 1609036391 · Pediatric Gastroenterology Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katja Karrento, MD is a Pediatric Gastroenterology Physician provider in Milwaukee, WI (NPI 1609036391).
Provider details
- NPI number
- 1609036391
- Entity type
- Individual
- Primary specialty
- Pediatric Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 55831 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
18 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
3 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,750 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 2575 E Evergreen DriveAppleton, WI 54913Phone: (920) 969-5353Fax: (414) 337-7201
- 4855 S Moorland RdNew Berlin, WI 53151-7494Phone: (414) 607-5280Fax: (414) 607-5288
Registry dates
- Enumerated
- 2008-06-16
- Last updated
- 2023-08-08
- Certified
- 2023-08-04
Frequently asked questions
- What is Katja Karrento's NPI number?
- Katja Karrento's National Provider Identifier (NPI) is 1609036391, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katja Karrento's specialty?
- Katja Karrento is listed in the NPPES registry with a primary specialty of Pediatric Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Katja Karrento located?
- Katja Karrento's practice location on file with NPPES is 9000 W Wisconsin Ave, Milwaukee, WI 53226-4874.
- What is Katja Karrento's phone number?
- The practice phone number listed in the NPPES registry for Katja Karrento is (414) 266-3690.
- Does Katja Karrento accept Medicare?
- Katja Karrento is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katja Karrento's NPI active?
- Yes — Katja Karrento's NPI (1609036391) is active in the NPPES registry as of the last update on 2023-08-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.