Kristen Zack MD
Also known as
- Formerly known asPietrzyk, Kristen Lynn
Source: NPPES public registry.
About this NPIWhat this record shows.
NPI 1376105692 is registered to Kristen Zack MD, a Nephrology Physician practising at 1045 N 30th St in Billings, Montana. Nephrology Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Kristen Zack MD has been enumerated in the National Provider Identifier (NPI) registry since 2019.
Your brand here.
Medicare enrollment
This provider holds 2 Medicare enrollments on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
Practitioner
- I20250912001092NephrologyMT
- I20260109001838NephrologyWY
Source: CMS PECOS public enrollment file.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Kristen Zack MD accepts. To confirm in-network status with your specific health plan, contact Kristen Zack MD directly at (406) 238-2500.
Frequently asked
Yes. NPI 1376105692 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Nephrology Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (406) 238-2500.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Kristen Zack MD is a Type-1 individual NPI.