Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Michael J Willerth , MD

Surgery • Fort Dodge, IA

Active NPI 1316919202 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

804 Kenyon Rd
Fort Dodge, IA 505015742

Call 5155746865 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

804 Kenyon Rd

Fort Dodge, IA 505015742

Telephone 5155746865
Organization at the Same NPPES Address or Phone
Trimark Physicians Group Inc Facility NPI 1528045275

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

CMS Doctors and Clinicians lists 3 distinct group names: Belmond Community Hospital; Iowa Physicians Clinic Medical Foundation; Iowa Specialty Hospital- Clarion. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Graduation Year

1989

Medicare patients

1,011 people with Original Medicare in 2024

Different Original Medicare patients in 2024; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.

Medicare-allowed amount

About $111,381 in 2024

The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.

Paid by Medicare

About $85,975 in 2024

The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.

30-day fills

440 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$14,783 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.

Open Payments general payments, program year 2024

All general payments: $511.77 across 6 records.

By nature of payment

  • Travel and Lodging: $405.90 across 2 records.
  • Food and Beverage: $105.87 across 4 records.

Reporting-company totals

  • Medtronic, Inc.: $495.52 across 5 records.
  • ZOLL Services LLC (A/K/A ZOLL LifeCor Corp): $16.25 across 1 record.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2024 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

37 years (graduated 1989)

CMS Doctors and Clinicians data list 1989 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

NPI first issued

2006

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Willerth has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Willerth as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Fort Dodge and Iowa

Billing and prescribing volume is not a quality rating.

Medicare Part B services

More Medicare Part B services than 95% of clinicians listed under Surgery in Iowa (2024, 165 clinicians with data). Median for this group: 218. Middle half: 108 to 446.

Too few clinicians listed under Surgery in Fort Dodge have Medicare Part B data for 2024 to compare.

Medicare-allowed amount

A higher Medicare-allowed amount than 90% of clinicians listed under Surgery in Iowa (2024, 165 clinicians with data). Median for this group: $26,263. Middle half: $10,824 to $51,039.

Too few clinicians listed under Surgery in Fort Dodge have Medicare Part B data for 2024 to compare.

Paid by Medicare

A higher Medicare payment amount than 90% of clinicians listed under Surgery in Iowa (2024, 165 clinicians with data). Median for this group: $19,774. Middle half: $8,669 to $39,413.

Too few clinicians listed under Surgery in Fort Dodge have Medicare Part B data for 2024 to compare.

Medicare Part D prescriptions

More Part D prescriptions than 90% of clinicians listed under Surgery in Iowa (2024, 221 clinicians with data). Median for this group: 61. Middle half: 23 to 126.

Too few clinicians listed under Surgery in Fort Dodge have Medicare Part D data for 2024 to compare.

Part D drug cost

A higher Part D drug cost than 95% of clinicians listed under Surgery in Iowa (2024, 221 clinicians with data). Median for this group: $320. Middle half: $87 to $2,116.

Too few clinicians listed under Surgery in Fort Dodge have Medicare Part D data for 2024 to compare.

3 active clinicians are listed under Surgery with a practice address in Fort Dodge, IA (437 in Iowa).

Addresses are self-reported to NPPES and may be out of date.

Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo · Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments · Program Year 2024
Disclosure Year:

Program year 2024 (payments made January 1 – December 31, 2024): fewer than 11 records totaling $511.77.

Manufacturer Payment Nature Product Type Amount ($)
Medtronic, Inc.
Travel and Lodging
In-kind items and services
ANTERALIGN SPINAL SYSTEM WITH TITAN NANOLOCK SURFACE TECHNOLOGY General $358.00
Medtronic, Inc.
Food and Beverage
In-kind items and services
PIVOX OBLIQUE LATERAL SPINAL SYSTEM General $48.00
Medtronic, Inc.
Travel and Lodging
In-kind items and services
ANTERALIGN SPINAL SYSTEM WITH TITAN NANOLOCK SURFACE TECHNOLOGY General $47.90
Medtronic, Inc.
Food and Beverage
In-kind items and services
PIVOX OBLIQUE LATERAL SPINAL SYSTEM General $25.00
Medtronic, Inc.
Food and Beverage
In-kind items and services
VENASEAL General $16.62
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
Food and Beverage
Cash or cash equivalent
LifeVest General $16.25

Source: CMS Open Payments, program year 2024, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2024.

CMS Part B · Data Year 2024
Reporting Year:

CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
93922 Ultrasound study of arm and leg arteries
339 288 $33.15 $10.68
93880 Ultrasound of both sides of head and neck blood flow
321 300 $104.76 $34.64
93925 Ultrasound of leg arteries or artery grafts
297 258 $223.44 $34.35
93971 Ultrasound study of one arm or leg veins with compression and maneuvers
184 174 $91.00 $19.28
93970 Ultrasound study of arm or leg veins with compression and maneuvers
122 120 $142.66 $29.95
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
111 91 $238.51 $117.65
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
87 77 $335.17 $166.44
93926 Ultrasound of one leg arteries or artery grafts
53 43 $134.64 $20.98
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
47 47 $352.09 $151.28
93975 Complete ultrasound of abdomen and pelvis artery and vein blood flow
42 36 $225.81 $50.30
93978 Complete ultrasound of aorta, vena cava, groin vessels or bypass grafts
33 28 $153.15 $34.22
77001 Fluoroscopic guidance for insertion or removal of central vein access device
27 24 $41.26 $16.29
76937 Ultrasonic guidance for blood vessel access
25 23 $32.48 $12.64
11042 Removal of skin and tissue, 20.0 sq cm or less
24 12 $361.75 $53.51
36471 Injection of chemical agent into multiple incompetent veins of leg
24 14 $782.13 $208.42
76706 Ultrasound scan of abdominal aorta
23 23 $61.22 $23.97
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
23 23 $300.17 $119.84
36558 Insertion of tunneled central venous tube for infusion (5 years or older)
20 18 $2408.00 $228.82
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
17 17 $228.94 $101.96
35301 Removal of blood clot and portion of chest, neck, or brain artery
16 14 $3354.13 $958.57
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
16 13 $240.75 $89.08
36821 Relocation of arm vein with connection to arm artery for hemodialysis
12 11 $1959.67 $567.68

Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D · Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Clopidogrel Clopidogrel Bisulfate 81 4,820 $408.93 18
Cilostazol Cilostazol 81 3,811 $1,246.92 18
Warfarin Sodium Warfarin Sodium 27 1,569 $65.06 —
Chlorpromazine Hcl Chlorpromazine Hcl 26 364 $4,512.59 —
Gabapentin Gabapentin 25 640 $273.52 —
Tramadol Hcl Tramadol Hcl 18 114 $35.96 15
Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen 15 88 $141.31 12
Xarelto Rivaroxaban 15 450 $8,099.07 —

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

License # reported to NPPES IA 31679

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.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Iowa State Medical Licensing Board.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - VASCULAR SURGERY

Medicare Enrollment ID

I20100224000956

Enrollment State Jurisdiction

IA

PECOS Control ID

7618029422

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File

Belmond Community Hospital

403 1st St Se, Belmond, IA 504211201

Phone: 6414443500

Iowa Physicians Clinic Medical Foundation

804 Kenyon Rd, Fort Dodge, IA 505015742

Phone: 5155734141

Iowa Specialty Hospital- Clarion

1316 S Main St, Clarion, IA 505252019

Phone: 5155322811

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

2 listed
NPI 1619108719

Doctor of Medicine (M.D.)

Rosalyn Zach , ARNP

Nurse Practitioner - Family

NPI 1386176758

Advanced Registered Nurse Practitioner

Career & Practice History

NPI enumerated February 03, 2006.

No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1316919202
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: February 03, 2006
Last Update: December 22, 2016
Sole Proprietor: No

Other Surgery Specialists in Fort Dodge

Healthcare providers in Fort Dodge

Mailing Address

24 N 9th St, Suite A

Fort Dodge, IA 505013909

Phone: 5155746890

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.