NATHANIEL J FULLERTON MD
NPI 1366417461
Internal Medicine in Fort Atkinson, WI

Q: What is Nathaniel Fullerton's NPI number?

The NPI number for Nathaniel Fullerton is 1366417461. It was assigned to this individual provider in the NPPES registry on February 22, 2006.

Q: What is Nathaniel Fullerton's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Active since February 22, 2006PECOS EnrolledAccepts Medicare Assignment

611 E SHERMAN AVE, FORT ATKINSON, WI 53538(920) 568-5411(920) 568-4004 Get Directions Write a Review

NPPES record last updated: April 11, 2018. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Nathaniel J Fullerton Md NPPES

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

NATHANIEL J FULLERTON MD (NPI 1366417461) is an individual internal medicine provider in Fort Atkinson, Wisconsin, licensed in Wisconsin (38510-20) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS, is affiliated with St. Agnes Hospital Hospice, and is a graduate of University Of Wisconsin School Of Medicine (1995).

NPPES Registry Identity

NPI1366417461

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameNATHANIEL J FULLERTONCredential: MD

Location Address611 E SHERMAN AVEFort Atkinson, WI 53538-1960

Mailing AddressPo Box 249Fort Atkinson, WI 53538-0249 · (920) 568-5411 · Fax (920) 568-4004

Phone(920) 568-5411

Fax(920) 568-4004

Sole ProprietorNo

Medical School CMSUniversity Of Wisconsin School Of MedicineGraduated 1995

Enumeration DateFebruary 22, 2006

Last NPPES UpdateApril 11, 2018

✔ NPI 1366417461 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in WI · 38510-20

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

611 E SHERMAN AVE, Fort Atkinson, WI 53538

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, CareSource (Common Ground Healthcare).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

Nathaniel J Fullerton Md 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 ID8729054226

PECOS Enrollment IDI20040907000694

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

Medicare enrollment records show Nathaniel Fullerton reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Fort Healthcare, Inc.

0.1 mi

General Acute Care Hospital

611 SHERMAN AVE E
Fort Atkinson, WI 53538

Reassigned Medicare billing, Wisconsin enrollment
298 clinicians in this Medicare group

NPI 1811916281 (920) 568-5000

Agnesian Healthcare

36 mi

Mental Health (Including Community Mental Health Center)

200 FRONT ST, SUITE 3D
Beaver Dam, WI 53916

Reassigned Medicare billing, Wisconsin enrollment
606 clinicians in this Medicare group

NPI 1700817657 (920) 885-2780

Informe Healthcare Il LLC

104 mi

Internal Medicine

11401 S OAKLEY AVE
Chicago, IL 60643

Reassigned Medicare billing, Wisconsin enrollment
22 clinicians in this Medicare group

NPI 1639790678 (773) 233-6311

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

98 services40 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

40 services40 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

25 services16 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician 93016

An exercise or drug-induced heart stress test with ECG involves monitoring your heart's activity while it's under stress, either from exercise or medication. A doctor supervises the entire procedure to ensure safety and accuracy in results. This test helps detect heart problems.

24 services24 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician 93018

An exercise or drug-induced heart stress test with ECG is a procedure to assess how your heart functions under stress. It can involve exercising or medication to make your heart work harder while an ECG records its activity. A physician reviews the results.

24 services24 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

21 services20 patients

Hospital Affiliations CMS Care Compare 3

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

St. Agnes Hospital Hospice

Acute Care Hospitals · Fond Du Lac, WI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520088

Location430 E Division StFond Du Lac, WI 54935 · Fond Du Lac County

Emergency services Birthing friendly

Ripon Medical Center

Critical Access Hospitals · Ripon, WI

OwnershipVoluntary non-profit - Private

CMS Certification Number521321

Location845 Parkside StRipon, WI 54971 · Fond Du Lac County

Emergency services

Waupun Memorial Hospital

Critical Access Hospitals · Waupun, WI

OwnershipVoluntary non-profit - Private

CMS Certification Number521327

Location620 W Brown StWaupun, WI 53963 · Fond Du Lac County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53538 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

$123.69 typical visit price

range $53.90 – $163.24

Typical copayment $30.92 (range $13.47 – $40.81)

Most-billed visit code 99204

Established Patient

$95.41 typical visit price

range $17.40 – $133.76

Typical copayment $23.85 (range $4.35 – $33.44)

Most-billed visit code 99214

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 4

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

Insertion tray with drainage bag with indwelling catheter, foley type, two-way latex with coating (teflon, silicone, silicone elastomer or hydrophilic, etc.) A4314

DME-Orthotic Devices · category DF000N

1 supplier18 claims18 services$24.45 avg. paid by Medicare

Bedside drainage bag, day or night, with or without anti-reflux device, with or without tube, each A4357

DME-Orthotic Devices · category DF000N

1 supplier19 claims20 services$9.38 avg. paid by Medicare

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

3 suppliers14 claims14 services$20.63 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

3 suppliers14 claims14 services$115.88 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 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. JAMIE L FOLTZ CRNA

Nurse Anesthetist, Certified Registered