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DR. JUSTIN GREGORY HAMMAR MD
NPI 1427437102
Pediatrics - Neonatal-Perinatal Medicine in Minneapolis, MN

Active since May 27, 2015PECOS Enrolled
2104 22ND AVE S APT 1, MINNEAPOLIS, MN 55404(612) 414-2363 Get Directions Write a Review

NPPES record last updated: July 1, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 1, 2021, Aug 13, 2018 (2 updates tracked since 2018).

About Dr. Justin Gregory Hammar Md NPPES

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

DR. JUSTIN GREGORY HAMMAR MD (NPI 1427437102) is an individual neonatal-perinatal medicine provider in Minneapolis, Minnesota, licensed in Minnesota (63976) and active in the NPI registry since May 2015. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1427437102
Entity TypeIndividualMale
Primary Taxonomy2080N0001X
Provider Legal NameDR. JUSTIN GREGORY HAMMARCredential: MD
Location Address2104 22ND AVE S APT 1Minneapolis, MN 55404-3171
Mailing Address2104 22nd Ave S Apt 1Minneapolis, MN 55404-3171
Phone(612) 414-2363
Sole ProprietorNo
Enumeration DateMay 27, 2015
Last NPPES UpdateJuly 1, 20212 updates tracked since enumeration
NPPES CertifiedJuly 1, 2021
✔ NPI 1427437102 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Neonatal-Perinatal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080N0001X
License✔ Licensed in MN · 63976
Definition
A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies.
2104 22ND AVE S APT 1, Minneapolis, MN 55404
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of North Dakota.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Justin Gregory Hammar 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 Reassignments

2

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

Centracare Clinic
34 mi
Multi-Specialty
16830 198TH AVE NW, CENTRACARE CLINIC - BIG LAKE
Big Lake, MN 55309
  • Reassigned Medicare billing, Minnesota enrollment
  • 1,051 clinicians in this Medicare group
NPI 1013104348 (763) 263-7300
Carris Health LLC
89 mi
Emergency Medicine
301 BECKER AVE SW
Willmar, MN 56201
  • Reassigned Medicare billing, Minnesota enrollment
  • 179 clinicians in this Medicare group
NPI 1134632680 (320) 235-4543

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

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 Justin Hammar's NPI number?

The NPI number for Justin Hammar is 1427437102. It was assigned to this individual provider in the NPPES registry on May 27, 2015.

Where is Justin Hammar located?

Justin Hammar practices at 2104 22nd Ave S Apt 1, Minneapolis, MN 55404. The listed phone number is (612) 414-2363.

What is Justin Hammar's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

Is Justin Hammar enrolled in Medicare?

Yes. Justin Hammar is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Justin Hammar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Justin Hammar reassigns Medicare benefits to 2 organizations: Centracare Clinic (Big Lake, MN) and Carris Health LLC (Willmar, MN). 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 Justin Hammar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Justin Hammar accept?

Health plans from Blue Cross Blue Shield of North Dakota list Justin Hammar 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 Justin Hammar was last updated on July 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.