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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MR. NATHAN S LARSON CRNA
NPI 1255683777
Nurse Anesthetist, Certified Registered in Lebanon, MO

Active since October 08, 2012PECOS EnrolledAccepts Medicare Assignment
100 HOSPITAL DR, LEBANON, MO 65536(417) 533-6100(417) 533-6021 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mr. Nathan S Larson Crna NPPES

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

MR. NATHAN S LARSON CRNA (NPI 1255683777) is an individual nurse anesthetist, certified registered in Lebanon, Missouri, licensed in Missouri (2013002285) and active in the NPI registry since October 2012. He is enrolled in Medicare PECOS, is affiliated with Ssm Health St Mary's Hospital -centralia, and is a graduate of Other (2012).

NPPES Registry Identity

NPI1255683777
Entity TypeIndividualMale
Primary Taxonomy367500000X
Provider Legal NameMR. NATHAN S LARSONCredential: CRNA
Location Address100 HOSPITAL DRLebanon, MO 65536-9210
Mailing AddressPo Box 505164Saint Louis, MO 63150-5164 · (417) 829-4620 · Fax (417) 829-4316
Phone(417) 533-6100
Fax(417) 533-6021
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateOctober 8, 2012
Last NPPES UpdateSeptember 29, 2026
✔ NPI 1255683777 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 MO · 2013002285
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.
100 HOSPITAL DR, Lebanon, MO 65536
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Other Identifiers 2

Medicaid1255683777MO
Medicaid600420082MO

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

Mr. Nathan S Larson 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 ID3274779905
PECOS Enrollment IDI20170912002794
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 Reassignments

5

Medicare enrollment records show Nathan Larson reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Memorial Hospital
155 mi
Critical Access
1900 STATE ST
Chester, IL 62233
  • Reassigned Medicare billing, Illinois enrollment
  • 62 clinicians in this Medicare group
NPI 1851390132 (618) 826-4581
Marion Anesthesia Company LLC
200 mi
Nurse Anesthetist, Certified Registered
3003 CIVIC CIRCLE BLVD
Marion, IL 62959
  • Reassigned Medicare billing, Illinois enrollment
  • 31 clinicians in this Medicare group
NPI 1790721579 (618) 993-1112
St. Mary's Hospital, Centralia, Illinois
200 mi
Anesthesiology
400 N PLEASANT AVE
Centralia, IL 62801
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: St Marys Hospital Centralia Illinois
  • 392 clinicians in this Medicare group
NPI 1477097871 (618) 436-6056
Good Samaritan Regional Health Center
206 mi
Specialist
1 GOOD SAMARITAN WAY
Mount Vernon, IL 62864
  • Reassigned Medicare billing, Illinois enrollment
  • 284 clinicians in this Medicare group
NPI 1134457955 (618) 899-4600
County Of Clay
237 mi
Critical Access
911 STACEY BURK DR
Flora, IL 62839
  • Reassigned Medicare billing, Illinois enrollment
  • 110 clinicians in this Medicare group
NPI 1184655136 (618) 662-2131

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 3

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 other procedure on large bowel using an endoscope 00811
Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.
22 services22 patients
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731
This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.
15 services15 patients
Anesthesia for exam of colon using an endoscope 00812
Anesthesia for a colon examination with an endoscope is a method used to ensure comfort during the procedure. It involves administering medication to help you relax or sleep, thus reducing discomfort as the endoscope, a thin, flexible tube, is navigated through your colon.
13 services13 patients

Hospital Affiliations CMS Care Compare 2

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

Ssm Health St Mary's Hospital -Centralia

Acute Care Hospitals · Centralia, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140034
Location400 North Pleasant AvenueCentralia, IL 62801 · Marion County
Emergency services

Good Samaritan Regional Hlth Center

Acute Care Hospitals · Mount Vernon, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140046
Location1 Good Samaritan WayMount Vernon, IL 62864 · Jefferson County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 65536 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
$121.96 typical visit price
range $52.28 – $161.24
Typical copayment $30.49 (range $13.07 – $40.31)
Most-billed visit code 99204
Established Patient
$65.71 typical visit price
range $16.30 – $131.05
Typical copayment $16.42 (range $4.07 – $32.76)
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.

MEREDITH LEIGH BROWN ATC, LAT
Specialist
100 HOSPITAL DR
LEBANON, MO 65536
Laclede County (816) 304-6100
EVAN E. FUSCO MD
Emergency Medicine
100 HOSPITAL DR
LEBANON, MO 65536
Laclede County (417) 533-6100
MERCY HOSPITAL LEBANON
Medicare Defined Swing Bed Unit
100 HOSPITAL DR
LEBANON, MO 65536
Laclede County (417) 533-6100
GREGORY SAINNOVAL M.D.
Surgery
100 HOSPITAL DR
LEBANON, MO 65536
Laclede County (417) 533-6100
ALI AHSEN SYED MD
Hospitalist
100 HOSPITAL DR
LEBANON, MO 65536
Laclede County (417) 533-6100
SARA L KRUSE CRNA
Nurse Anesthetist, Certified Registered
100 HOSPITAL DR
LEBANON, MO 65536
Laclede County (417) 533-6026
SUSAN LOVE CRNA
Nurse Anesthetist, Certified Registered
100 HOSPITAL DR
LEBANON, MO 65536
Laclede County (417) 533-6100
WENDY WALKER RD, LD, CNSD
Dietitian, Registered
100 HOSPITAL DR
LEBANON, MO 65536
Laclede County (417) 533-6047

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 Nathan Larson's NPI number?

The NPI number for Nathan Larson is 1255683777. It was assigned to this individual provider in the NPPES registry on October 8, 2012.

Where is Nathan Larson located?

Nathan Larson practices at 100 Hospital Dr, Lebanon, MO 65536. The listed phone number is (417) 533-6100.

What is Nathan Larson's specialty?

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

Is Nathan Larson enrolled in Medicare?

Yes. Nathan Larson 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 Nathan Larson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nathan Larson reassigns Medicare benefits to 5 organizations: Memorial Hospital (Chester, IL), Marion Anesthesia Company LLC (Marion, IL), St. Mary's Hospital, Centralia, Illinois (Centralia, IL), Good Samaritan Regional Health Center (Mount Vernon, IL) and County Of Clay (Flora, IL). 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 Nathan Larson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Nathan Larson affiliated with any hospitals?

According to CMS data, Nathan Larson is affiliated with Ssm Health St Mary's Hospital -Centralia and Good Samaritan Regional Hlth Center.

When was this NPI record last updated?

The NPPES record for Nathan Larson was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 29 days 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.