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DR. TRICIA LAWRENCE MERRIGAN M.D.
NPI 1467548727
Surgery in Sioux Falls, SD

Active since October 05, 2006PECOS EnrolledAccepts Medicare Assignment
1000 E 23RD ST, STE 360, SIOUX FALLS, SD 57105(605) 322-3950(605) 322-3960 Get Directions Write a Review

NPPES record last updated: December 23, 2013. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Tricia Lawrence Merrigan M.d. NPPES

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

DR. TRICIA LAWRENCE MERRIGAN M.D. (NPI 1467548727) is an individual surgery provider in Sioux Falls, South Dakota, licensed in South Dakota (8158) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS, is affiliated with Spencer Municipal Hospital, and is a graduate of Sanford School Of Medicine Of University Of South Dakota (2006).

NPPES Registry Identity

NPI1467548727
Entity TypeIndividualFemale
Primary Taxonomy208600000X
Provider Legal NameDR. TRICIA LAWRENCE MERRIGANCredential: M.D.
Location Address1000 E 23RD ST, STE 360Sioux Falls, SD 57105-2108
Mailing Address911 E 20th St, Ste 700Sioux Falls, SD 57105-1042 · (605) 334-0393 · Fax (605) 334-6028
Phone(605) 322-3950
Fax(605) 322-3960
Sole ProprietorNo
Medical School CMSSanford School Of Medicine Of University Of South DakotaGraduated 2006
Enumeration DateOctober 5, 2006
Last NPPES UpdateDecember 23, 2013
✔ NPI 1467548727 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in SD · 8158
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
1000 E 23RD ST, Sioux Falls, SD 57105
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Other Names 1

Former Name (1)Dr. Tricia Lee Ann Lawrence M.d.

Other Identifiers 2

Medicare PINS106367SD
Medicaid7302820SD

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Sunflower Health Plan, Ambetter Health, Ambetter Health of Delaware 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 and accepts Medicare assignment

Dr. Tricia Lawrence Merrigan M.d. 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 ID2264689496
PECOS Enrollment IDI20120823000371
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 Reassignment

Medicare enrollment records show Tricia Merrigan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Avera Mckennan
Same address
Hematology & Oncology
1000 E 23RD ST STE 230
Sioux Falls, SD 57105
  • Reassigned Medicare billing, South Dakota enrollment
  • 1,277 clinicians in this Medicare group
NPI 1033185582 (605) 322-6900

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 7

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
171 services159 patients
Biopsy or removal of deep lymph nodes of underarm 38525
A biopsy or removal of deep underarm lymph nodes is a procedure where a small sample of lymph node tissue is taken for testing. This helps in diagnosing or ruling out conditions like infections or cancers. It involves a small incision and is typically done under local or general anesthesia.
54 services54 patients
Imaging of lymph nodes during surgery 38900
Imaging of lymph nodes during surgery involves taking detailed pictures of your lymph nodes to help surgeons see and assess them in real-time. This procedure can aid in detecting disease, guiding treatment, and improving surgical precision.
51 services51 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
50 services50 patients
Partial removal of breast 19301
A partial removal of the breast, also known as a lumpectomy, involves taking out a portion of the breast tissue to eliminate concerning cells. It's typically performed when the problem area is limited in size. This procedure helps to preserve most of the breast's appearance while aiming to remove all the unhealthy cells.
48 services44 patients
Simple complete removal of breast 19303
This procedure involves the total removal of breast tissue. It's typically done to treat or prevent conditions like cancer. The operation involves an incision on the skin, removal of the tissue, and closure of the wound. Post-surgery, care and recovery plans are provided.
21 services21 patients

Hospital Affiliations CMS Care Compare 5

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

Spencer Municipal Hospital

Acute Care Hospitals · Spencer, IA
5/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number160112
Location1200 1st Avenue EastSpencer, IA 51301 · Clay County
Emergency services Birthing friendly

Lakes Regional Healthcare

Acute Care Hospitals · Spirit Lake, IA
3/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number160124
Location2301 Highway 71Spirit Lake, IA 51360 · Dickinson County
Emergency services Birthing friendly

Avera Marshall Regional Medical Ctr

Critical Access Hospitals · Marshall, MN
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number241359
Location300 South Bruce StreetMarshall, MN 56258 · Lyon County
Emergency services

Avera St Lukes

Acute Care Hospitals · Aberdeen, SD
5/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number430014
Location305 S State St Post Office Box 4450Aberdeen, SD 57401 · Brown County
Emergency services Birthing friendly

Avera Mckennan Hospital & University Health Center

Acute Care Hospitals · Sioux Falls, SD
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number430016
Location1325 S Cliff AveSioux Falls, SD 57117 · Minnehaha County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 57105 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
$85.21 typical visit price
range $55.52 – $167.23
Typical copayment $21.30 (range $13.88 – $41.80)
Most-billed visit code 99203
Established Patient
$69.20 typical visit price
range $18.08 – $137.08
Typical copayment $17.30 (range $4.52 – $34.27)
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.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Breast prosthesis, mastectomy bra, without integrated breast prosthesis form, any size, any type L8000
DME-Orthotic Devices · category DF000N
5 suppliers33 claims49 services$29.63 avg. paid by Medicare
Breast prosthesis, silicone or equal, without integral adhesive L8030
DME-Orthotic Devices · category DF000N
3 suppliers11 claims16 services$268.30 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

LACEY BALLEW
Social Worker (Clinical)
1000 E 23RD ST
SIOUX FALLS, SD 57105
Minnehaha County (056) 322-7549
KRISTEN DAWN HURLEY CNP
Nurse Practitioner (Family)
1000 E 23RD ST, STE. 200
SIOUX FALLS, SD 57105
Minnehaha County (605) 322-3035
ALEXANDRA ERICKSON DPT
Physical Therapist
1000 E 23RD ST
SIOUX FALLS, SD 57105
Minnehaha County (605) 322-2100
BARBARA ANNE SCHLAGER MD
Radiology (Radiation Oncology)
1000 E 23RD ST, STE 100
SIOUX FALLS, SD 57105
Minnehaha County (605) 322-1625
CASSIE LEIGH BRUGMAN CNP
Nurse Practitioner
1000 E 23RD ST
SIOUX FALLS, SD 57105
Minnehaha County (605) 322-6900
MRS. ELIZABETH ANN O'NEILL MS ARNP-BC
Nurse Practitioner
1000 E 23RD ST, SUITE #230
SIOUX FALLS, SD 57105
Minnehaha County (605) 322-7334
JESSICA DAWN KLEIN CNP
Nurse Practitioner
1000 E 23RD ST
SIOUX FALLS, SD 57105
Minnehaha County (605) 322-3035
ALYSSA DEMUTH
Genetic Counselor, MS
1000 E 23RD ST
SIOUX FALLS, SD 57105
Minnehaha County (605) 322-3000

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 Tricia Merrigan's NPI number?

The NPI number for Tricia Merrigan is 1467548727. It was assigned to this individual provider in the NPPES registry on October 5, 2006. The provider is also known as Dr. Tricia Lee Ann Lawrence M.D..

Where is Tricia Merrigan located?

Tricia Merrigan practices at 1000 E 23rd St Ste 360, Sioux Falls, SD 57105. The listed phone number is (605) 322-3950.

What is Tricia Merrigan's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Tricia Merrigan enrolled in Medicare?

Yes. Tricia Merrigan 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 organization bills Medicare for Tricia Merrigan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tricia Merrigan reassigns Medicare benefits to Avera Mckennan (Sioux Falls, SD). The 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 Tricia Merrigan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Tricia Merrigan accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Sunflower Health Plan, Avera Health Plans and Wellmark Health Plan of Iowa, Inc. and 1 other insurer list Tricia Merrigan 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 Tricia Merrigan affiliated with any hospitals?

According to CMS data, Tricia Merrigan is affiliated with Spencer Municipal Hospital, Lakes Regional Healthcare, Avera Marshall Regional Medical Ctr, Avera St Lukes and Avera Mckennan Hospital & University Health Center.

When was this NPI record last updated?

The NPPES record for Tricia Merrigan was last updated on December 23, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.