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DR. DANIEL J RIORDAN D.O.
NPI 1174545891
Internal Medicine in Muskego, WI

Active since July 24, 2006PECOS EnrolledAccepts Medicare Assignment
S69W15636 JANESVILLE RD, MUSKEGO, WI 53150(262) 928-7000(414) 422-2079 Get Directions Write a Review

NPPES record last updated: January 29, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Daniel J Riordan D.o. NPPES

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

DR. DANIEL J RIORDAN D.O. (NPI 1174545891) is an individual internal medicine provider in Muskego, Wisconsin, licensed in Wisconsin (49311) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Waukesha Memorial Hospital, and is a graduate of At Still University Of Health Sciences, College Of Osteo Med, Kirksville (2003).

NPPES Registry Identity

NPI1174545891
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. DANIEL J RIORDANCredential: D.O.
Location AddressS69W15636 JANESVILLE RDMuskego, WI 53150-9330
Mailing AddressS69w15636 Janesville RdMuskego, WI 53150-9330 · (262) 928-7000 · Fax (414) 422-2079
Phone(262) 928-7000
Fax(414) 422-2079
Sole ProprietorNo
Medical School CMSAt Still University Of Health Sciences, College Of Osteo Med, KirksvilleGraduated 2003
Enumeration DateJuly 24, 2006
Last NPPES UpdateJanuary 29, 2025
NPPES CertifiedJanuary 29, 2025
✔ NPI 1174545891 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 · 49311
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.
S69W15636 JANESVILLE RD, Muskego, WI 53150
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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, First Choice Next, Network Health and more.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. Daniel J Riordan D.o. 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 ID3173527272
PECOS Enrollment IDI20060901000228
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 12

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.
269 services152 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.
127 services99 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
99 services99 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
44 services42 patients
Influenza vaccine, inactivated 90653
The Influenza vaccine, inactivated, is a shot given to protect against the flu. It contains killed virus particles that help your body build immunity to the flu. It's recommended annually to keep your protection up-to-date. It's safe for ages 6 months and up.
34 services34 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
28 services23 patients

Hospital Affiliations CMS Care Compare

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

Waukesha Memorial Hospital

Acute Care Hospitals · Waukesha, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520008
Location725 American AveWaukesha, WI 53188 · Waukesha County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53150 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 6

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
7 suppliers14 claims59 services$6.17 avg. paid by Medicare
Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034
DME-Other DME · category DE001N
4 suppliers11 claims11 services$42.39 avg. paid by Medicare
Tubing used with positive airway pressure device A7037
DME-Other DME · category DE001N
5 suppliers13 claims13 services$7.69 avg. paid by Medicare
Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035
Other-Enteral and Parenteral · category OB006N
1 supplier19 claims436 services$4.67 avg. paid by Medicare
Enteral formula, for pediatrics, hydrolyzed/amino acids and peptide chain proteins, includes fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4161
Other-Enteral and Parenteral · category OB006N
1 supplier13 claims3,974 services$2.35 avg. paid by Medicare
Insulin for administration through dme (i.e., insulin pump) per 50 units J1817
Treatment-Injections and Infusions (nononcologic) · category RI000N
2 suppliers11 claims1,250 services$7.10 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 10

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

ALLIANCE ENT & HEARING CENTER, S.C.
Clinic/Center (Medical Specialty)
S69W15636 JANESVILLE RD
MUSKEGO, WI 53150
Waukesha County (414) 727-0910
PROHEALTH MEDICAL GROUP INC
Internal Medicine
S69W15636 JANESVILLE RD
MUSKEGO, WI 53150
Waukesha County (262) 928-7000
JENA RUTHERFORD
Social Worker (Clinical)
S69W15636 JANESVILLE RD
MUSKEGO, WI 53150
Waukesha County (262) 928-7000
HEARING CENTER, INC.
Hearing Aid Equipment
S69W15636 JANESVILLE RD
MUSKEGO, WI 53150
Waukesha County (414) 258-9428
MS. LAURIE ANN WHORLEY APNP
Nurse Practitioner
S69W15636 JANESVILLE RD
MUSKEGO, WI 53150
Waukesha County (262) 928-7000
KYLE J OLSON PT
Physical Therapist
S69W15636 JANESVILLE RD
MUSKEGO, WI 53150
Waukesha County (262) 446-9488
JOHN E. DYER M.D.
Pediatrics
S69W15636 JANESVILLE RD, PROHEALTH CARE MEDICAL ASSOCIATES INC
MUSKEGO, WI 53150
Waukesha County (262) 928-7000
JOY BERGER ZGANJAR
Nurse Practitioner (Family)
S69W15636 JANESVILLE RD
MUSKEGO, WI 53150
Waukesha County (262) 928-7000

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 Daniel Riordan's NPI number?

The NPI number for Daniel Riordan is 1174545891. It was assigned to this individual provider in the NPPES registry on July 24, 2006.

Where is Daniel Riordan located?

Daniel Riordan practices at S69w15636 Janesville Rd, Muskego, WI 53150. The listed phone number is (262) 928-7000.

What is Daniel Riordan's specialty?

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

Is Daniel Riordan enrolled in Medicare?

Yes. Daniel Riordan 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 Daniel Riordan accept?

Health plans from Anthem Blue Cross and Blue Shield, First Choice Next, Network Health and UnitedHealthcare list Daniel Riordan 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 Daniel Riordan affiliated with any hospitals?

According to CMS data, Daniel Riordan is affiliated with Waukesha Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Daniel Riordan was last updated on January 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 months 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.