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JAMES J. SIMMONS MD
NPI 1235494295
Anesthesiology in Janesville, WI

Active since July 05, 2012PECOS EnrolledAccepts Medicare Assignment
1000 MINERAL POINT AVE, JANESVILLE, WI 53548(608) 756-6731(608) 756-6013 Get Directions Write a Review

NPPES record last updated: August 27, 2018. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 27, 2018, Mar 17, 2018, Jan 10, 2018 and 1 more (4 updates tracked since 2016).

About James J. Simmons Md NPPES

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

JAMES J. SIMMONS MD (NPI 1235494295) is an individual anesthesiology provider in Janesville, Wisconsin, licensed in Wisconsin (65154-20) and active in the NPI registry since July 2012. He is enrolled in Medicare PECOS, is affiliated with Mercy Health System Corp, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1235494295
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameJAMES J. SIMMONSCredential: MD
Location Address1000 MINERAL POINT AVEJanesville, WI 53548
Mailing Address1000 Mineral Point AveJanesville, WI 53548-2940 · (608) 756-6731 · Fax (608) 756-6013
Phone(608) 756-6731
Fax(608) 756-6013
Sole ProprietorNo
Medical School CMSRush Medical College Of Rush UniversityGraduated 2012
Enumeration DateJuly 5, 2012
Last NPPES UpdateAugust 27, 20184 updates tracked since enumeration
✔ NPI 1235494295 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Licenses✔ Licensed in WI · 65154-20✔ Licensed in IL · 036138041✔ Licensed in IL · 125061829
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
1000 MINERAL POINT AVE, Janesville, WI 53548
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1611 W. Park St., AnesthesiologyUrbana, IL 61801-2500 · Phone (217) 383-6941
Location 21506 S Oneida StAppleton, WI 54915-1305 · Phone (920) 738-2000

Other Identifiers 1

Medicaid1235494295WI

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

James J. Simmons 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 ID6800181215
PECOS Enrollment IDI20161212000883
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 James Simmons reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mercy Health System Corporation
Same address
General Acute Care Hospital
1000 MINERAL POINT AVE
Janesville, WI 53548
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,155 clinicians in this Medicare group
NPI 1093768962 (608) 756-6000

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 2

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.

Anesthesia for lens surgery 00142
Anesthesia for lens surgery involves administering medication to numb the eye area, ensuring you feel no pain during the procedure. This can be a local anesthetic (numbing only the eye area) or general (where you're asleep). It helps make the surgery comfortable and stress-free.
23 services23 patients
Anesthesia for x-ray or radiation therapy 01922
Anesthesia for x-ray or radiation therapy involves administering medication to help you relax or sleep during the procedure. It's used to ensure comfort, minimize movement, and reduce anxiety. The type of anesthesia used depends on the procedure and patient's health.
20 services20 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

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Pre-operative OSA assessment
Percentage of patients who undergo a surgical procedure in the operating room/procedure room that have a pre-operative assessment for Obstructive Sleep Apnea (OSA)
100%1,009 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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.

BENJAMIN C. MILLER PMHNP
Nurse Practitioner (Psychiatric/Mental Health)
1000 MINERAL POINT AVE
JANESVILLE, WI 53548
Rock County (608) 756-6508
KARINA LAURA PAULIUS QUINN MD
Plastic Surgery
1000 MINERAL POINT AVE
JANESVILLE, WI 53548
Rock County (608) 756-6000
ALESIA L DRAKE DPT, PT
Physical Therapist
1000 MINERAL POINT AVE
JANESVILLE, WI 53548
Rock County (608) 756-6842
PAULINE R CASS PHARMD
Pharmacist
1000 MINERAL POINT AVE
JANESVILLE, WI 53548
Rock County (608) 756-6000
KAREN SAUNDERS OT
Occupational Therapist
1000 MINERAL POINT AVE
JANESVILLE, WI 53548
Rock County (608) 756-6000
DR. MERLE S RUST MD
Neurological Surgery
1000 MINERAL POINT AVE, MERCY WEST NEUROSURGERY
JANESVILLE, WI 53548
Rock County (608) 756-6826
DR. MICHAEL V COOGAN MD
Emergency Medicine (Medical Toxicology)
1000 MINERAL POINT AVE
JANESVILLE, WI 53548
Rock County (608) 756-6000
CHRISTOPHER B GOODAVISH PA
Physician Assistant
1000 MINERAL POINT AVE
JANESVILLE, WI 53548
Rock County (608) 756-6868

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 James Simmons's NPI number?

The NPI number for James Simmons is 1235494295. It was assigned to this individual provider in the NPPES registry on July 5, 2012.

Where is James Simmons located?

James Simmons practices at 1000 Mineral Point Ave, Janesville, WI 53548. The listed phone number is (608) 756-6731.

What is James Simmons's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is James Simmons enrolled in Medicare?

Yes. James Simmons 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 James Simmons's services?

According to the CMS Revalidation Reassignment List (October 2026 release), James Simmons reassigns Medicare benefits to Mercy Health System Corporation (Janesville, WI). 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 James Simmons's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is James Simmons affiliated with any hospitals?

According to CMS data, James Simmons is affiliated with Mercy Health System Corp.

When was this NPI record last updated?

The NPPES record for James Simmons was last updated on August 27, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.