DR. THOM S THOMASSEN MD
NPI 1407903180
Ophthalmology in Janesville, WI

Active since January 04, 2007PECOS EnrolledAccepts Medicare Assignment
3524 E MILWAUKEE ST, JANESVILLE, WI 53546(608) 756-7100 Get Directions Write a Review

NPPES record last updated: September 29, 2011. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Dr. Thom S Thomassen Md NPPES

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

DR. THOM S THOMASSEN MD (NPI 1407903180) is an individual ophthalmology provider in Janesville, Wisconsin, licensed in Wisconsin (34177) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, is affiliated with Mercy Health System Corp, and is a graduate of Duke University School Of Medicine (1977).

NPPES Registry Identity

NPI1407903180
Entity TypeIndividualMale
Primary Taxonomy207W00000X
Provider Legal NameDR. THOM S THOMASSENCredential: MD
Location Address3524 E MILWAUKEE STJanesville, WI 53546-1626
Mailing Address3524 E Milwaukee StJanesville, WI 53546-1626 · (608) 756-7100
Sole ProprietorNo
Medical School CMSDuke University School Of MedicineGraduated 1977
Enumeration DateJanuary 4, 2007
Last NPPES UpdateSeptember 29, 2011
NPI 1407903180 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
Licenses Licensed in WI · 34177 Licensed in IL · 036-092307
Definition

An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

3524 E MILWAUKEE ST, Janesville, WI 53546

Other Identifiers 3

Medicaid31929600WI
Medicare UPINF61105
Medicare PIN541760104WI

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. Thom S Thomassen 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 ID6608906755
PECOS Enrollment IDI20100616000292
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.

Areas of Expertise CMS Part B claims 8

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, 30-39 minutes 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
98 services94 patients
Established patient office or other outpatient visit, 20-29 minutes 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.
64 services46 patients
Exam of visual field with extended testing 92083
An extended visual field exam is a detailed test to evaluate your peripheral (side) vision. It helps to detect any potential blind spots which may not be noticeable in daily life. These could be caused by eye diseases like glaucoma, or neurological conditions.
39 services37 patients
Imaging of optic nerve 92133
Imaging of the optic nerve is a non-invasive procedure that captures detailed pictures of your optic nerve. It helps doctors assess eye health, particularly for conditions like glaucoma. It's painless, quick, and uses safe technology like MRI or OCT (Optical Coherence Tomography).
33 services33 patients
Removal of recurring cataract in lens capsule using a laser 66821
This procedure, known as YAG laser capsulotomy, treats cloudiness in the lens capsule following cataract surgery. A laser is used to create a small hole in the cloudy capsule, allowing light to pass through and restore clear vision. It's a quick, painless procedure.
20 services14 patients
Imaging of retina 92134
Imaging of the retina is a non-invasive procedure that captures detailed images of your eye's interior. This helps detect conditions like macular degeneration or retinal detachment. It's painless and takes only a few minutes.
11 services11 patients

Hospital Affiliations CMS Care Compare

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

Mercy Health System Corp

Acute Care Hospitals · Janesville, WI
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520066
Location1000 Mineral Point AveJanesville, WI 53548 · Rock County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53546 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
$67.37 typical visit price
range $17.40 – $133.76
Typical copayment $16.84 (range $4.35 – $33.44)
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.

Family Medicine
3524 E MILWAUKEE ST
JANESVILLE, WI 53546
Orthopaedic Surgery
3524 E MILWAUKEE ST
JANESVILLE, WI 53546
Emergency Medicine
3524 E MILWAUKEE ST
JANESVILLE, WI 53546
Family Medicine
3524 E MILWAUKEE ST
JANESVILLE, WI 53546
Emergency Medicine
3524 E MILWAUKEE ST
JANESVILLE, WI 53546
Ophthalmology
3524 E MILWAUKEE ST
JANESVILLE, WI 53546
Dietitian, Registered
3524 E MILWAUKEE ST
JANESVILLE, WI 53546
Orthopaedic Surgery (Hand Surgery)
3524 E MILWAUKEE ST
JANESVILLE, WI 53546

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 Thom Thomassen's NPI number?

The NPI number for Thom Thomassen is 1407903180. It was assigned to this individual provider in the NPPES registry on January 4, 2007.

Where is Thom Thomassen located?

Thom Thomassen practices at 3524 E Milwaukee St, Janesville, WI 53546. The listed phone number is (608) 756-7100.

What is Thom Thomassen's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Thom Thomassen enrolled in Medicare?

Yes. Thom Thomassen 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.

What insurance does Thom Thomassen accept?

Health plans from Anthem Blue Cross and Blue Shield and MercyCare Health Plans list Thom Thomassen 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 Thom Thomassen affiliated with any hospitals?

According to CMS data, Thom Thomassen is affiliated with Mercy Health System Corp.

When was this NPI record last updated?

The NPPES record for Thom Thomassen was last updated on September 29, 2011. NPI Profile syncs with the weekly NPPES data releases published by CMS.