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STEVEN THOMAS MATTHIESEN
NPI 1841629441
Nurse Anesthetist, Certified Registered in Granger, IN

Active since November 04, 2013
50820 SUMMIT HILL CT, SHADOWFAX ANESTHESIA, GRANGER, IN 46530(312) 415-1137 Get Directions Write a Review

NPPES record last updated: November 28, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Steven Thomas Matthiesen NPPES

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

STEVEN THOMAS MATTHIESEN (NPI 1841629441) is an individual nurse anesthetist, certified registered in Granger, Indiana, licensed in Indiana (28212067A) and active in the NPI registry since November 2013.

NPPES Registry Identity

NPI1841629441
Entity TypeIndividualMale
Primary Taxonomy367500000X
Provider Legal NameSTEVEN THOMAS MATTHIESEN
Location Address50820 SUMMIT HILL CT, SHADOWFAX ANESTHESIAGranger, IN 46530-9720
Mailing Address50820 Summit Hill Ct, Shadowfax AnesthesiaGranger, IN 46530-9720 · (312) 415-1137
Phone(312) 415-1137
Sole ProprietorNo
Enumeration DateNovember 4, 2013
Last NPPES UpdateNovember 28, 2015
✔ NPI 1841629441 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 IN · 28212067A
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.
50820 SUMMIT HILL CT, Granger, IN 46530
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health 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)

Steven Thomas Matthiesen is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignments

8

Medicare enrollment records show Steven Matthiesen reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Saint Joseph Regional Medical Center-South Bend Campus, Inc.
3.4 mi
Family Medicine
611 E DOUGLAS RD, STE 406, FAMILY MEDICINE FACULTY PHYSICIANS
Mishawaka, IN 46545
  • Reassigned Medicare billing, Indiana enrollment
  • 216 clinicians in this Medicare group
NPI 1144580150 (574) 335-6580
United Surgeons, LLC
3.7 mi
Anesthesiology
4455 EDISON LAKES PKWY
Mishawaka, IN 46545
  • Reassigned Medicare billing, Indiana enrollment
  • 54 clinicians in this Medicare group
NPI 1376148593 (574) 231-6800
Cardinal Anesthesia, LLC
4.3 mi
Nurse Anesthetist, Certified Registered
51050 BITTERSWEET RD
Granger, IN 46530
  • Reassigned Medicare billing, Indiana enrollment
  • 16 clinicians in this Medicare group
NPI 1134570153 (718) 208-0446
Sda Consultants PLLC
12 mi
Anesthesiology
500 ARCADE AVE STE 100
Elkhart, IN 46514
  • Reassigned Medicare billing, Indiana enrollment
  • 104 clinicians in this Medicare group
NPI 1336605500 (574) 522-9505
Great Lakes Anesthesia, P.C.
12 mi
Anesthesiology
700 E BEARDSLEY AVE STE 209
Elkhart, IN 46514
  • Reassigned Medicare billing, Indiana enrollment
  • Medicare enrollment name: Great Lakes Anesthesia PC
  • 60 clinicians in this Medicare group
NPI 1720039977 (574) 522-9922
Stat Anesthesia Specialists, Ltd.
21 mi
Anesthesiology
1020 HIGH RD
Bremen, IN 46506
  • Reassigned Medicare billing, Indiana enrollment
  • 97 clinicians in this Medicare group
NPI 1992754089 (317) 697-1407
Jebs Anesthesia Consultants, LLC
32 mi
Anesthesiology
900 I ST
La Porte, IN 46350
  • Reassigned Medicare billing, Indiana enrollment
  • 141 clinicians in this Medicare group
NPI 1790447761 (317) 697-1407
Iceland Anesthesia Management, LLC
169 mi
Anesthesiology
1606 N 7TH ST
Terre Haute, IN 47804
  • Reassigned Medicare billing, Indiana enrollment
  • 166 clinicians in this Medicare group
NPI 1912578667 (833) 352-0096

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

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Anesthesia for procedure for total knee joint replacement 01402
Anesthesia for a total knee joint replacement numbs your body to eliminate pain during surgery. This could be general anesthesia where you're unconscious, or regional anesthesia where only the leg is numb. It's administered by a specialist, ensuring safety and comfort.
77 services76 patients
Ultrasonic guidance for needle placement 76942
Ultrasonic guidance for needle placement is a technique where sound waves create images that help accurately position the needle during procedures. This method ensures precision, minimizes discomfort, and increases safety.
48 services48 patients
Anesthesia for total hip replacement 01214
Anesthesia for total hip replacement is a medical service where medication is given to eliminate pain during surgery. Two types are commonly used: general anesthesia, making you unconscious, or spinal anesthesia, numbing the lower body. The choice depends on your health and your doctor's recommendation.
41 services41 patients
Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) 64447
This procedure involves injecting a numbing agent and/or steroid into a nerve in your thigh. It's done to alleviate pain or inflammation. A needle will be carefully positioned near the nerve, and the medicine will be administered.
36 services36 patients
Injection of anesthetic agent and/or steroid into knee nerve branch using imaging guidance 64454
This procedure involves injecting anesthetic and/or steroid medication into a knee nerve branch. Imaging technology is used to ensure accurate placement of the needle. This can help reduce pain and inflammation in the knee area.
32 services32 patients
Anesthesia for open or endoscopic total shoulder joint replacement 01638
Anesthesia for total shoulder joint replacement, either open or endoscopic, involves using medications to block pain during surgery. It can be general (you're asleep) or regional (only the area being operated on is numbed). This ensures comfort and stillness, facilitating a successful procedure.
11 services11 patients

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 Steven Matthiesen's NPI number?

The NPI number for Steven Matthiesen is 1841629441. It was assigned to this individual provider in the NPPES registry on November 4, 2013.

Where is Steven Matthiesen located?

Steven Matthiesen practices at 50820 Summit Hill Ct Shadowfax Anesthesia, Granger, IN 46530. The listed phone number is (312) 415-1137.

What is Steven Matthiesen's specialty?

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

Is Steven Matthiesen enrolled in Medicare?

Yes. Steven Matthiesen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Steven Matthiesen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Steven Matthiesen reassigns Medicare benefits to 8 organizations: Saint Joseph Regional Medical Center-South Bend Campus, Inc. (Mishawaka, IN), United Surgeons, LLC (Mishawaka, IN), Cardinal Anesthesia, LLC (Granger, IN), Sda Consultants PLLC (Elkhart, IN), Great Lakes Anesthesia, P.C. (Elkhart, IN) and 3 more organizations, listed in the Medicare section above. 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 Steven Matthiesen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Steven Matthiesen accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian and CareSource list Steven Matthiesen 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 Steven Matthiesen was last updated on November 28, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.