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CHRISTOPHER ROBERT MERTENS MD
NPI 1609373547
Pediatrics - Pediatric Pulmonology in Milwaukee, WI

Active since April 08, 2018PECOS Enrolled
9000 W WISCONSIN AVE STE B620, MILWAUKEE, WI 53226(414) 266-6730(414) 266-6742 Get Directions Write a Review

NPPES record last updated: July 18, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Aug 9, 2021, Jul 16, 2021, Jun 27, 2021 (3 updates tracked since 2021).

About Christopher Robert Mertens Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CHRISTOPHER ROBERT MERTENS MD (NPI 1609373547) is an individual pediatric pulmonology provider in Milwaukee, Wisconsin, licensed in Wisconsin (83582-20) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1609373547
Entity TypeIndividualMale
Primary Taxonomy2080P0214X
Provider Legal NameCHRISTOPHER ROBERT MERTENSCredential: MD
Location Address9000 W WISCONSIN AVE STE B620Milwaukee, WI 53226-4874
Mailing Address9000 W Wisconsin Ave Ste B620Milwaukee, WI 53226-4874 · (414) 266-6730 · Fax (414) 266-6742
Phone(414) 266-6730
Fax(414) 266-6742
Sole ProprietorNo
Enumeration DateApril 8, 2018
Last NPPES UpdateJuly 18, 20253 updates tracked since enumeration
NPPES CertifiedJuly 18, 2025
✔ NPI 1609373547 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric PulmonologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0214X
License✔ Licensed in WI · 83582-20
Definition
A pediatrician dedicated to the prevention and treatment of all respiratory diseases affecting infants, children and young adults. This specialist is knowledgeable about the growth and development of the lung, assessment of respiratory function in infants and children, and experienced in a variety of invasive and noninvasive diagnostic techniques.
Also ListedPediatricsTaxonomy 208000000X · License 83582-20 (WI)
9000 W WISCONSIN AVE STE B620, Milwaukee, WI 53226
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource (Common Ground Healthcare), HealthPartners, Network Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Christopher Robert Mertens Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Christopher Mertens reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Alabama Health Services Foundation, PC
652 mi
Clinical Medical Laboratory
720 20TH STREET SOUTH
Birmingham, AL 35294
  • Reassigned Medicare billing, Alabama enrollment
  • 4,494 clinicians in this Medicare group
NPI 1366638330 (205) 934-4983

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ALEXANDRA E KALINOWSKI
Student in an Organized Health Care Education/Training Program
9000 W WISCONSIN AVE STE B620
MILWAUKEE, WI 53226
Milwaukee County (414) 266-6730

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Christopher Mertens's NPI number?

The NPI number for Christopher Mertens is 1609373547. It was assigned to this individual provider in the NPPES registry on April 8, 2018.

Where is Christopher Mertens located?

Christopher Mertens practices at 9000 W Wisconsin Ave Ste B620, Milwaukee, WI 53226. The listed phone number is (414) 266-6730.

What is Christopher Mertens's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Pulmonology, with taxonomy code 2080P0214X.

Is Christopher Mertens enrolled in Medicare?

Yes. Christopher Mertens is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Christopher Mertens's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Christopher Mertens reassigns Medicare benefits to University Of Alabama Health Services Foundation, PC (Birmingham, AL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Christopher Mertens's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Christopher Mertens accept?

Health plans from CareSource (Common Ground Healthcare), HealthPartners and Network Health list Christopher Mertens as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Christopher Mertens was last updated on July 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.