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

PATRICK PAUL LITONJUA MD
NPI 1831297308
Internal Medicine - Endocrinology, Diabetes & Metabolism in Janesville, WI

Q: What is Patrick Litonjua's NPI number?

The NPI number for Patrick Litonjua is 1831297308. It was assigned to this individual provider in the NPPES registry on September 20, 2006.

Q: What is Patrick Litonjua's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Q: When was this NPI record last updated?

The NPPES record for Patrick Litonjua 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 24 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.

Active since September 20, 2006PECOS EnrolledAccepts Medicare Assignment

3524 E MILWAUKEE ST, JANESVILLE, WI 53546(608) 756-7100(608) 756-4700 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Patrick Paul Litonjua Md NPPES

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

PATRICK PAUL LITONJUA MD (NPI 1831297308) is an individual endocrinology, diabetes & metabolism provider in Janesville, Wisconsin, licensed in Wisconsin (52852-020) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Mercy Health System Corp, and is a graduate of Other (1990).

NPPES Registry Identity

NPI1831297308

Entity TypeIndividualMale

Primary Taxonomy207RE0101X

Provider Legal NamePATRICK PAUL LITONJUACredential: MD

Location Address3524 E MILWAUKEE STJanesville, WI 53546-1626

Mailing Address3524 E Milwaukee StJanesville, WI 53546-1626 · (608) 756-7100 · Fax (608) 756-4700

Phone(608) 756-7100

Fax(608) 756-4700

Sole ProprietorNo

Medical School CMSOtherGraduated 1990

Enumeration DateSeptember 20, 2006

Last NPPES UpdateSeptember 29, 2026

✔ NPI 1831297308 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians

Taxonomy Code207RE0101X

License✔ Licensed in WI · 52852-020

Definition

An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.

3524 E MILWAUKEE ST, Janesville, WI 53546

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Other Identifiers 3

OtherLITONPATWI · Mercycare Insurance

Medicaid1831297308WI

Other60949WI · Dean Health Insurance

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, MercyCare, MercyCare Health Plans.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

Patrick Paul Litonjua 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 ID2567414790

PECOS Enrollment IDI20090803000279

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 Patrick Litonjua reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mercy Health System Corporation

3.0 mi

Mental Health (Including Community Mental Health Center)

903 MINERAL POINT AVE
Janesville, WI 53548

Reassigned Medicare billing, Wisconsin enrollment
1,155 clinicians in this Medicare group

NPI 1669685129 (608) 756-5555

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 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.

360 services196 patients

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.

152 services136 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

49 services49 patients

Hospital Affiliations CMS Care Compare 2

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

Mercy Walworth Hospital & Medical Center

Critical Access Hospitals · Lake Geneva, WI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number521357

LocationN2950 State Road 67Lake Geneva, WI 53147 · Walworth 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

$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 8

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

Supplies for maintenance of insulin infusion catheter, per week A4224

DME-Other DME · category DE017N

3 suppliers17 claims214 services$18.30 avg. paid by Medicare

Supplies for external insulin infusion pump, syringe type cartridge, sterile, each A4225

DME-Other DME · category DE017N

3 suppliers19 claims586 services$2.42 avg. paid by Medicare

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

24 suppliers134 claims601 services$6.05 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

14 suppliers33 claims55 services$0.99 avg. paid by Medicare

External ambulatory infusion pump, insulin E0784

DME-Other DME · category DE017N

2 suppliers12 claims12 services$329.97 avg. paid by Medicare

Insulin for administration through dme (i.e., insulin pump) per 50 units J1817

Treatment-Injections and Infusions (nononcologic) · category RI000N

4 suppliers14 claims1,460 services$6.67 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.

REBECCA JEAN WEISSBURG PHYSICIAN ASSISTANT

Physician Assistant