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MACKENZIE NICOLE ZIER PNP-AC
NPI 1639641806
Nurse Practitioner - Pediatrics, Critical Care in Houston, TX

Active since December 27, 2018PECOS Enrolled
6621 FANNIN ST, HOUSTON, TX 77030(832) 824-1000 Get Directions Write a Review

NPPES record last updated: December 27, 2018. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mackenzie Nicole Zier Pnp-ac NPPES

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

MACKENZIE NICOLE ZIER PNP-AC (NPI 1639641806) is an individual pediatrics, critical care provider in Houston, Texas, licensed in Texas (AP139245) and active in the NPI registry since December 2018. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1639641806
Entity TypeIndividualFemale
Primary Taxonomy363LP0222X
Provider Legal NameMACKENZIE NICOLE ZIERCredential: PNP-AC
Location Address6621 FANNIN STHouston, TX 77030-2399
Mailing Address20962 Winchester Rock DrPorter, TX 77365-4770 · (406) 672-0218
Phone(832) 824-1000
Sole ProprietorNo
Enumeration DateDecember 27, 2018
✔ NPI 1639641806 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Pediatrics, Critical CarePhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0222X
License✔ Licensed in TX · AP139245
6621 FANNIN ST, Houston, TX 77030
Open in Google Maps ↗

Other Identifiers 1

OtherAP139245TX · Texas Board Of Nursing

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mackenzie Nicole Zier Pnp-ac 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 Mackenzie Zier reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Scl Health Medical Group - Billings LLC
1,318 mi
Clinic/Center
1233 N 30TH ST
Billings, MT 59101
  • Reassigned Medicare billing, Montana enrollment
  • 438 clinicians in this Medicare group
NPI 1508289703 (406) 237-7700

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77030 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
$90.40 typical visit price
range $58.24 – $176.98
Typical copayment $22.60 (range $14.56 – $44.24)
Most-billed visit code 99203
Established Patient
$102.71 typical visit price
range $18.60 – $143.93
Typical copayment $25.67 (range $4.65 – $35.98)
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.

Other Providers at the Same Location NPPES 20

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

DR. TAKETO BABA M.D.
Pediatrics (Pediatric Emergency Medicine)
6621 FANNIN ST
HOUSTON, TX 77030
Harris County (832) 824-1000
ZACHARY FOUGHTY
Pediatrics (Pediatric Emergency Medicine)
6621 FANNIN ST
HOUSTON, TX 77030
Harris County (832) 824-1173
ASHIRA MORGAN KLEIN MD
Pediatrics (Pediatric Emergency Medicine)
6621 FANNIN ST
HOUSTON, TX 77030
Harris County (832) 824-1000
CINDY ANN MILLER PT
Physical Therapist
6621 FANNIN ST
HOUSTON, TX 77030
Harris County (832) 826-1000
JENNA AUSTIN DAVIS PA-C
Physician Assistant
6621 FANNIN ST
HOUSTON, TX 77030
Harris County (804) 955-7043
RONALD EASLEY M.D.
Anesthesiology
6621 FANNIN ST
HOUSTON, TX 77030
Harris County (832) 824-1000
DENNIS BIER MD
Pediatrics (Pediatric Endocrinology)
6621 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 798-7022
DR. DONALD WILLIAMS PARSONS M.D., PH.D.
Pediatrics (Pediatric Hematology-Oncology)
6621 FANNIN ST, MC 3-3320
HOUSTON, TX 77030
Harris County (832) 822-4556

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 Mackenzie Zier's NPI number?

The NPI number for Mackenzie Zier is 1639641806. It was assigned to this individual provider in the NPPES registry on December 27, 2018.

Where is Mackenzie Zier located?

Mackenzie Zier practices at 6621 Fannin St, Houston, TX 77030. The listed phone number is (832) 824-1000.

What is Mackenzie Zier's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Pediatrics, Critical Care, with taxonomy code 363LP0222X.

Is Mackenzie Zier enrolled in Medicare?

Yes. Mackenzie Zier is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mackenzie Zier's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mackenzie Zier reassigns Medicare benefits to Scl Health Medical Group - Billings LLC (Billings, MT). 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 Mackenzie Zier's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mackenzie Zier accept?

Health plans from Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans and Providence Health Plan list Mackenzie Zier 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 Mackenzie Zier was last updated on December 27, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.