ROBERT S. NIZNIK MD – NPI #1922447069
Internal Medicine

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

Health Care Provider Taxonomy Code for Internal Medicine

ROBERT NIZNIK is a physician located in BELLINGHAM, WA. NPPES has assigned the NPI number 1922447069 to ROBERT NIZNIK on June 21, 2013. It is a Type-1 NPI, indicating this NPI number is associated with an individual. With multiple taxonomy codes selected, the primary taxonomy selected by this provider is 207RN0300X from the Health Care Provider Taxonomy code set, which is classified as Internal Medicine, specializing in Nephrology

The NPI profile was last updated on Sep 11, 2025. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for ROBERT NIZNIK below.

NPI Profile for
ROBERT S. NIZNIK

NPI Number
1922447069
Enumeration Date

(about 13 years ago)
Entity Type
Type-1  Individual (Male)
Legal Name
ROBERT S. NIZNIK
Credentials
MD
Primary location
3104 SQUALICUM PKWY STE 101
BELLINGHAM, WA 98225-1941
Phone: (360) 734-9233 Fax: (360) 738-8974
1 Other location(s):
Mayo Clinic 200 1st St SW
Rochester, MN 55905-0001
Phone: (507) 284-2511
Mailing address
Same as primary location
Sole Proprietor
No
Updated
Certification Date
Sep 11, 2025

Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.

Identifiers

Identifiers for ROBERT NIZNIK

Identifiers are used to associate other provider identifiers such as Medicaid or other insurers (ie:, Blue Cross, Blue Shield, Aetna, Kaiser-Permanente, etc.), with their NPI number. These identifiers can be used in matching an NPI number to an insurer's records. However, not all providers have such numbers and not all providers choose to include them in their NPI information.

DescriptionIssuerStateIdentifier
medicaidWA2063556
Taxonomy Code(s)

A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.

Taxonomy Classification / Specialization State License
207RN0300X
- Internal Medicine / Nephrology (Primary)		 WA MD60890396
390200000X
- Student in an Organized Health Care Education/Training Program		 CO TL.0004905
207R00000X
- Internal Medicine		 MN 60296

The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.

Endpoint

Health Information Exchange (HEI)

HEI is the mobilization of health care information electronically across organizations within a region, community or hospital system. Endpoints provide a simple and secure way for participants to send authenticated, encrypted health information directly to known, trusted recipients over the internet such as primary care physicians, specialists, hospitals, labs, etc.

Endpoint
[email protected]
Endpoint type
Direct Messaging Address
Endpoint Description
Content Type
Affiliation
N
Endpoint Location
410 BIRCHWOOD AVE STE 200,
BELLINGHAM, WA 77025-1669

Additional Information

Accepts Medicare
This provider accepts Medicare-approved amount as payment in full. The Medicare-approved amount is the total the provider can be paid. When a provider accepts the Medicare-approved amount as payment, you won't be billed for more than the Medicare deductible & coinsureance.
Medicare Ordering & Referring
Provider can:
  • Refer to Part B
  • Order Durable Medical Equipment
  • Refer to Home Health Agency
  • Order Power Mobility Devices
Affiliations
ROBERT NIZNIK is affiliated with the following medical group(s):
  • HOSPITAL
    • ST JOSEPH HOSPITAL
      2901 SQUALICUM PARKWAY
      BELLINGHAM, WA 98225
  • DIALYSIS FACILITY
    • DAVITA MOUNT BAKER KIDNEY AT HOME
      410 BIRCHWOOD SUITE 100
      BELLINGHAM, WA 98225

Why is my NPI data (personal information) being displayed publicly?
If you have an active NPI profile, your profile is required to be disclosed according to the FOIA and eFOIA. HIPAA also requires covered providers to share their NPI with other providers, health plans, clearinghouses and any entity that may need it for billing purposes.

How do I correct or change the NPI data displayed here?
At any time, providers can make changes to their NPI profile at NPPES. Login to NPPES to make changes online or call (800) 465-3203 for assistance. Changes made at NPPES will be reflected on this web site within a few days.

Can I hide my NPI profile from the public?
Unfortunately, No. The NPPES discloses health care provider data under the Freedom of Information Act to the public, which means anyone may request such information directly from the National Plan & Provider Enumeration System. See the complete CMS Data Dissemination Notice here.