1. Home
  2. Directory
  3. North Dakota
  4. Dickinson
  5. Nurse Anesthetist Certified Registered
  6. NPI Profile

MRS. TAMMY J GROSULAK CRNA
NPI 1083892095
Nurse Anesthetist, Certified Registered in Dickinson, ND

Active since February 01, 2008Accepts Medicare Assignment
30 7TH ST W, DICKINSON, ND 58601(701) 456-4000(701) 456-4800 Get Directions Write a Review

NPPES record last updated: September 23, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Mrs. Tammy J Grosulak Crna NPPES

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

MRS. TAMMY J GROSULAK CRNA (NPI 1083892095) is an individual nurse anesthetist, certified registered in Dickinson, North Dakota, licensed in North Dakota (R28920) and active in the NPI registry since February 2008. She is affiliated with Sanford Medical Center Bismarck, maintains a secondary practice location in Minot, and is a graduate of Other (2007).

NPPES Registry Identity

NPI1083892095
Entity TypeIndividualFemale
Primary Taxonomy367500000X
Provider Legal NameMRS. TAMMY J GROSULAKCredential: CRNA
Location Address30 7TH ST WDickinson, ND 58601-4335
Mailing AddressPo Box 5074Sioux Falls, SD 57117-5074
Phone(701) 456-4000
Fax(701) 456-4800
Sole ProprietorNo
Medical School CMSOtherGraduated 2007
Enumeration DateFebruary 1, 2008
Last NPPES UpdateSeptember 23, 2025
NPPES CertifiedSeptember 23, 2025
✔ NPI 1083892095 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Anesthetist, Certified RegisteredPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367500000X
License✔ Licensed in ND · R28920
Definition
(1) A licensed registered nurse with advanced specialty education in anesthesia who, in collaboration with appropriate health care professionals, provides preoperative, intraoperative, and postoperative care to patients and assists in management and resuscitation of critical patients in intensive care, coronary care, and emergency situations. Nurse anesthetists are certified following successful completion of credentials and state licensure review and a national examination directed by the Council on Certification of Nurse Anesthetists. (2) A registered nurse who is qualified by special training to administer anesthesia in collaboration with a physician or dentist and who can assist in the care of patients who are in critical condition.
30 7TH ST W, Dickinson, ND 58601
Open in Google Maps ↗

Secondary Practice Location 1

Location 12305 37th Ave SWMinot, ND 58701-7669 · Phone (701) 857-5000

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 and accepts Medicare assignment

Mrs. Tammy J Grosulak Crna 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 ID2163505058
PECOS Enrollment IDI20080226000260

Medicare Billing Reassignments

4

Medicare enrollment records show Tammy Grosulak reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

St. Joseph's Hospital And Health Center
0.1 mi
Surgery
45 8TH ST W
Dickinson, ND 58601
  • Reassigned Medicare billing, North Dakota enrollment
  • 401 clinicians in this Medicare group
NPI 1073745279 (701) 456-4000
Sanford Bismarck
0.2 mi
Multi-Specialty
33 9TH ST W
Dickinson, ND 58601
  • Reassigned Medicare billing, North Dakota enrollment
  • 779 clinicians in this Medicare group
NPI 1720075377 (701) 483-6017
West River Health Services
1.3 mi
Clinic/Center
683 STATE AVE, SUITE E
Dickinson, ND 58601
  • Reassigned Medicare billing, North Dakota enrollment
  • Also billed through NPI 1588763247 (North Dakota)
  • 28 clinicians in this Medicare group
NPI 1629169008 (701) 483-4561
Trinity Health
96 mi
Family Medicine
1102 MAIN ST
Williston, ND 58801
  • Reassigned Medicare billing, North Dakota enrollment
  • 339 clinicians in this Medicare group
NPI 1396784146 (701) 572-7711

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

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

Sanford Medical Center Bismarck

Acute Care Hospitals · Bismarck, ND
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number350015
Location300 N 7th StBismarck, ND 58506 · Burleigh County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 58601 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
$127.45 typical visit price
range $55.75 – $168.12
Typical copayment $31.86 (range $13.93 – $42.03)
Most-billed visit code 99204
Established Patient
$69.48 typical visit price
range $18.11 – $137.65
Typical copayment $17.37 (range $4.52 – $34.41)
Most-billed visit code 99213
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.

ROBERTA WOCK
Physical Therapist
30 7TH ST W
DICKINSON, ND 58601
Stark County (701) 456-4000
ST JOSEPHS HOSPITAL & HEALTH CENTER
Psychiatry & Neurology (Psychiatry)
30 7TH ST W
DICKINSON, ND 58601
Stark County (701) 456-4308
MEGAN GIETZEN NP
Nurse Practitioner (Family)
30 7TH ST W
DICKINSON, ND 58601
Stark County (701) 483-6666
DR. JENNIFER L WAHL PHARMD
Pharmacist
30 7TH ST W
DICKINSON, ND 58601
Stark County (701) 456-4288
TERESA BLEICH
Physical Therapist
30 7TH ST W
DICKINSON, ND 58601
Stark County (701) 456-4000
DR. ROBERT STEVEN RIDDICK M.D.
Surgery
30 7TH ST W
DICKINSON, ND 58601
Stark County (701) 456-4387
SHELDON SWENSON MD
Emergency Medicine
30 7TH ST W
DICKINSON, ND 58601
Stark County (701) 456-4000
ST JOSEPH'S HOSPITAL AND HEALTH CENTER
Hospice Care, Community Based
30 7TH ST W
DICKINSON, ND 58601
Stark County (701) 456-4378

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 Tammy Grosulak's NPI number?

The NPI number for Tammy Grosulak is 1083892095. It was assigned to this individual provider in the NPPES registry on February 1, 2008.

Where is Tammy Grosulak located?

Tammy Grosulak practices at 30 7th St W, Dickinson, ND 58601. The listed phone number is (701) 456-4000.

What is Tammy Grosulak's specialty?

The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.

Is Tammy Grosulak enrolled in Medicare?

Yes. Tammy Grosulak 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 Tammy Grosulak's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tammy Grosulak reassigns Medicare benefits to 4 organizations: St. Joseph's Hospital And Health Center (Dickinson, ND), Sanford Bismarck (Dickinson, ND), West River Health Services (Dickinson, ND) and Trinity Health (Williston, ND). 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 Tammy Grosulak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Tammy Grosulak accept?

Health plans from Blue Cross Blue Shield of North Dakota list Tammy Grosulak 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 Tammy Grosulak affiliated with any hospitals?

According to CMS data, Tammy Grosulak is affiliated with Sanford Medical Center Bismarck.

When was this NPI record last updated?

The NPPES record for Tammy Grosulak was last updated on September 23, 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.