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DR. CHRISTOPHER F MILDENBERG MD
NPI 1154409175
Internal Medicine in Sturgeon Bay, WI

Active since November 01, 2006PECOS EnrolledAccepts Medicare Assignment
30 N 18TH AVE STE 4B, STURGEON BAY, WI 54235(920) 818-1001(833) 438-1838 Get Directions Write a Review

NPPES record last updated: August 28, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 9, 2023, Oct 7, 2021, Sep 17, 2019 (3 updates tracked since 2019).

About Dr. Christopher F Mildenberg Md NPPES

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

DR. CHRISTOPHER F MILDENBERG MD (NPI 1154409175) is an individual internal medicine provider in Sturgeon Bay, Wisconsin, licensed in Wisconsin (1154409175) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, is affiliated with Aurora Baycare Medical Ctr, and is a graduate of Medical College Of Wisconsin (2001).

NPPES Registry Identity

NPI1154409175
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. CHRISTOPHER F MILDENBERGCredential: MD
Location Address30 N 18TH AVE STE 4BSturgeon Bay, WI 54235-3207
Mailing Address30 N 18th Ave Ste 4bSturgeon Bay, WI 54235-3207 · (920) 818-1001 · Fax (833) 438-1838
Phone(920) 818-1001
Fax(833) 438-1838
Sole ProprietorNo
Medical School CMSMedical College Of WisconsinGraduated 2001
Enumeration DateNovember 1, 2006
Last NPPES UpdateAugust 28, 20253 updates tracked since enumeration
NPPES CertifiedAugust 28, 2025
✔ NPI 1154409175 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in WI · 1154409175✔ Licensed in WI · 49841
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
30 N 18TH AVE STE 4B, Sturgeon Bay, WI 54235
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, CareSource (Common Ground Healthcare), 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 and accepts Medicare assignment

Dr. Christopher F Mildenberg Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID648297127
PECOS Enrollment IDI20061212000188
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 Reassignments

2

Medicare enrollment records show Christopher Mildenberg reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ascension Medical Group-Southeast Wisconsin Inc
123 mi
Internal Medicine
400 W RIVER WOODS PKWY
Glendale, WI 53212
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,343 clinicians in this Medicare group
NPI 1609881077 (414) 465-3000
Independent Physicians Of Wisconsin, LLC
125 mi
Internal Medicine
5434 W CAPITOL DR STE 3
Milwaukee, WI 53216
  • Reassigned Medicare billing, Wisconsin enrollment
  • 52 clinicians in this Medicare group
NPI 1871975920 (414) 875-0505

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

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Aurora Baycare Medical Ctr

Acute Care Hospitals · Green Bay, WI
5/5 CMS rating
OwnershipProprietary
CMS Certification Number520193
Location2845 Greenbrier RdGreen Bay, WI 54311 · Brown County
Emergency services Birthing friendly

Door County Medical Center

Critical Access Hospitals · Sturgeon Bay, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number521358
Location323 South 18th AvenueSturgeon Bay, WI 54235 · Door County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54235 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$123.69 typical visit price
range $53.90 – $163.24
Typical copayment $30.92 (range $13.47 – $40.81)
Most-billed visit code 99204
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Mildenberg's NPI number?

The NPI number for Christopher Mildenberg is 1154409175. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Where is Christopher Mildenberg located?

Christopher Mildenberg practices at 30 N 18th Ave Ste 4B, Sturgeon Bay, WI 54235. The listed phone number is (920) 818-1001.

What is Christopher Mildenberg's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Christopher Mildenberg enrolled in Medicare?

Yes. Christopher Mildenberg is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Christopher Mildenberg's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Christopher Mildenberg reassigns Medicare benefits to 2 organizations: Ascension Medical Group-Southeast Wisconsin Inc (Glendale, WI) and Independent Physicians Of Wisconsin, LLC (Milwaukee, WI). Each 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 Mildenberg's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Christopher Mildenberg accept?

Health plans from Anthem Blue Cross and Blue Shield, CareSource (Common Ground Healthcare) and Network Health list Christopher Mildenberg 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.

Is Christopher Mildenberg affiliated with any hospitals?

According to CMS data, Christopher Mildenberg is affiliated with Aurora Baycare Medical Ctr and Door County Medical Center.

When was this NPI record last updated?

The NPPES record for Christopher Mildenberg was last updated on August 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.