1. Home
  2. Directory
  3. Wisconsin
  4. La Crosse
  5. Internal Medicine
  6. NPI Profile

DARREN KNOX M.D.
NPI 1558892869
Internal Medicine in La Crosse, WI

Active since March 27, 2017PECOS EnrolledAccepts Medicare Assignment
1836 SOUTH AVE, LA CROSSE, WI 54601(608) 782-7300 Get Directions Write a Review

NPPES record last updated: September 30, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 30, 2020, Mar 27, 2017 (2 updates tracked since 2017).

About Darren Knox M.d. NPPES

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

DARREN KNOX M.D. (NPI 1558892869) is an individual internal medicine provider in La Crosse, Wisconsin, licensed in Wisconsin (73501) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with Veterans Memorial Hospital, and maintains a secondary practice location in Burlington.

NPPES Registry Identity

NPI1558892869
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDARREN KNOXCredential: M.D.
Location Address1836 SOUTH AVELa Crosse, WI 54601-5429
Mailing Address1836 South AveLa Crosse, WI 54601-5429
Phone(608) 782-7300
Sole ProprietorYes
Medical School CMSOtherGraduated 2017
Enumeration DateMarch 27, 2017
Last NPPES UpdateSeptember 30, 20202 updates tracked since enumeration
NPPES CertifiedSeptember 30, 2020
✔ NPI 1558892869 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in WI · 73501
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.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1836 SOUTH AVE, La Crosse, WI 54601
Open in Google Maps ↗

Secondary Practice Location 1

Location 1111 Colchester AveBurlington, VT 05401-1473 · Phone (802) 847-2345

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Group Health Cooperative-SCW.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

Darren Knox M.d. 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 ID8921379884
PECOS Enrollment IDI20201008000603
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

6

Medicare enrollment records show Darren Knox reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Gundersen Clinic Ltd
Same address
Clinic/Center
1836 SOUTH AVE
La Crosse, WI 54601
  • Reassigned Medicare billing, Wisconsin enrollment
  • 928 clinicians in this Medicare group
NPI 1851343115 (608) 782-7300
Gundersen Lutheran Medical Center, Inc
Same address
Clinic/Center
710 DENTON ST
La Crosse, WI 54601
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,457 clinicians in this Medicare group
NPI 1619210895 (608) 782-7300
Tri-County Memorial Hospital, Inc.
34 mi
Rural Health
420 S PETERSON AVE
Blair, WI 54616
  • Reassigned Medicare billing, Wisconsin enrollment
  • Also billed through NPI 1124063573 (Wisconsin)
  • 293 clinicians in this Medicare group
NPI 1659625192 (608) 989-2505
St. Joseph's Health Services, Inc.
46 mi
Critical Access
400 WATER AVE
Hillsboro, WI 54634
  • Reassigned Medicare billing, Wisconsin enrollment
  • Medicare enrollment name: St Josephs Health Services Inc
  • 282 clinicians in this Medicare group
NPI 1972591410 (608) 489-8000
Memorial Hospital Of Boscobel
53 mi
Critical Access
205 PARKER ST
Boscobel, WI 53805
  • Reassigned Medicare billing, Wisconsin enrollment
  • 299 clinicians in this Medicare group
NPI 1306804794 (608) 375-4112
Moundview Memorial Hospital & Clinics, Inc
73 mi
Critical Access
402 W LAKE ST
Friendship, WI 53934
  • Reassigned Medicare billing, Wisconsin enrollment
  • 67 clinicians in this Medicare group
NPI 1710939533 (608) 339-3331

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.
206 services81 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
57 services57 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
48 services15 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.
41 services41 patients
Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
33 services32 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
23 services23 patients

Hospital Affiliations CMS Care Compare 5

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

Veterans Memorial Hospital

Critical Access Hospitals · Waukon, IA
OwnershipGovernment - Local
CMS Certification Number161318
Location40 1st Street SEWaukon, IA 52172 · Allamakee County
Emergency services

Winnmed

Critical Access Hospitals · Decorah, IA
OwnershipGovernment - Local
CMS Certification Number161371
Location901 Montgomery StreetDecorah, IA 52101 · Winneshiek County
Emergency services

Gundersen Lutheran Medical Center

Acute Care Hospitals · La Crosse, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520087
Location1910 South AveLa Crosse, WI 54601 · La Crosse County
Emergency services Birthing friendly

Gundersen Moundview Hospital And Clinics

Critical Access Hospitals · Friendship, WI
OwnershipVoluntary non-profit - Private
CMS Certification Number521309
Location402 W Lake StFriendship, WI 53934 · Adams County
Emergency services

Vernon Memorial Hospital

Critical Access Hospitals · Viroqua, WI
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number521348
Location507 South Main StViroqua, WI 54665 · Vernon County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54601 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 3

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

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
4 suppliers27 claims27 services$17.58 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
4 suppliers27 claims27 services$94.35 avg. paid by Medicare
Albuterol, up to 2.5 mg and ipratropium bromide, up to 0.5 mg, fda-approved final product, non-compounded, administered through dme J7620
DME-Drugs Administered Through DME · category DG006N
3 suppliers12 claims1,230 services$0.10 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.

JEFFREY BRIAN TROHKIMOINEN M.D.
Anesthesiology
1836 SOUTH AVE, GUNDERSEN CLINIC, LTD.
LA CROSSE, WI 54601
La Crosse County (608) 775-2031
JESSICA E THESING CRNA
Nurse Anesthetist, Certified Registered
1836 SOUTH AVE
LA CROSSE, WI 54601
La Crosse County (608) 782-7300
DR. MICHAEL DAVID SMITH PSY.D.
Psychologist
1836 SOUTH AVE
LA CROSSE, WI 54601
La Crosse County (608) 782-7300
JESSICA MAE RASMUSSEN
Surgery
1836 SOUTH AVE
LA CROSSE, WI 54601
La Crosse County (608) 782-7300
JULIE SONSALLA NP
Nurse Practitioner (Adult Health)
1836 SOUTH AVE
LA CROSSE, WI 54601
La Crosse County (608) 782-7300
LAURA KLINGBEIL
Orthopaedic Surgery
1836 SOUTH AVE
LA CROSSE, WI 54601
La Crosse County (608) 782-7300
SUSAN CAROL SORRENTINO RN
Registered Nurse (Addiction (Substance Use Disorder))
1836 SOUTH AVE
LA CROSSE, WI 54601
La Crosse County (608) 782-7300
NAOMI MUTHONI RUIRU NP
Nurse Practitioner (Family)
1836 SOUTH AVE
LA CROSSE, WI 54601
La Crosse County (608) 782-7300

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 Darren Knox's NPI number?

The NPI number for Darren Knox is 1558892869. It was assigned to this individual provider in the NPPES registry on March 27, 2017.

Where is Darren Knox located?

Darren Knox practices at 1836 South Ave, La Crosse, WI 54601. The listed phone number is (608) 782-7300.

What is Darren Knox's specialty?

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

Is Darren Knox enrolled in Medicare?

Yes. Darren Knox 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 organizations bill Medicare for Darren Knox's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Darren Knox reassigns Medicare benefits to 6 organizations: Gundersen Clinic Ltd (La Crosse, WI), Gundersen Lutheran Medical Center, Inc (La Crosse, WI), Tri-County Memorial Hospital, Inc. (Blair, WI), St. Joseph's Health Services, Inc. (Hillsboro, WI), Memorial Hospital Of Boscobel (Boscobel, WI) and 1 more organization, listed in the Medicare section above. Each 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 Darren Knox's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Darren Knox accept?

Health plans from Group Health Cooperative-SCW list Darren Knox 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 Darren Knox affiliated with any hospitals?

According to CMS data, Darren Knox is affiliated with Veterans Memorial Hospital, Winnmed, Gundersen Lutheran Medical Center, Gundersen Moundview Hospital And Clinics and Vernon Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Darren Knox was last updated on September 30, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.