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MARK S. SKIER M.D.
NPI 1346234812
Internal Medicine in Bayview, WI

Active since September 09, 2005PECOS Enrolled
3119 S CLEMENT AVE, BAYVIEW, WI 53207(414) 486-1900(414) 486-4148 Get Directions Write a Review

NPPES record last updated: June 26, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jun 26, 2025, Dec 3, 2021 (2 updates tracked since 2021).

About Mark S. Skier M.d. NPPES

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

MARK S. SKIER M.D. (NPI 1346234812) is an individual internal medicine provider in Bayview, Wisconsin, licensed in Wisconsin (34018) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, is affiliated with Aurora St Lukes Medical Center, and is a graduate of Albert Einstein College Of Medicine Of Yeshiva University (1991).

NPPES Registry Identity

NPI1346234812
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameMARK S. SKIERCredential: M.D.
Location Address3119 S CLEMENT AVEBayview, WI 53207-2835
Mailing AddressPo Box 735044Chicago, IL 60673-5044 · (800) 326-2250
Phone(414) 486-1900
Fax(414) 486-4148
Sole ProprietorNo
Medical School CMSAlbert Einstein College Of Medicine Of Yeshiva UniversityGraduated 1991
Enumeration DateSeptember 9, 2005
Last NPPES UpdateJune 26, 20252 updates tracked since enumeration
NPPES CertifiedJune 26, 2025
✔ NPI 1346234812 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 · 34018
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.
3119 S CLEMENT AVE, Bayview, WI 53207
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Other Identifiers 2

Medicaid32030400WI
OtherP00639728WI · Rr Medicare

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Aspirus Health Plan, CareSource (Common Ground Healthcare) 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 (PECOS)

Mark S. Skier M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3971416652
PECOS Enrollment IDI20080930000737
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 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.

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.
313 services177 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.
126 services126 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
46 services43 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.
45 services42 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.
25 services22 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
23 services23 patients

Hospital Affiliations CMS Care Compare 2

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

Aurora St Lukes Medical Center

Acute Care Hospitals · Milwaukee, WI
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520138
Location2900 W Oklahoma AveMilwaukee, WI 53215 · Milwaukee County
Emergency services Birthing friendly

West Allis Memorial Hospital

Acute Care Hospitals · West Allis, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520139
Location8901 W Lincoln AveWest Allis, WI 53227 · Milwaukee County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53207 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

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
8 suppliers39 claims121 services$5.16 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 2

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

THOMAS R. BRAND M.D.
Internal Medicine
3119 S CLEMENT AVE
BAYVIEW, WI 53207
Milwaukee County (414) 486-1900
MS. MELODY RUTH SOCHA NP
Nurse Practitioner
3119 S CLEMENT AVE
MILWAUKEE, WI 53207
Milwaukee County (414) 486-1900

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 Mark Skier's NPI number?

The NPI number for Mark Skier is 1346234812. It was assigned to this individual provider in the NPPES registry on September 9, 2005.

Where is Mark Skier located?

Mark Skier practices at 3119 S Clement Ave, Bayview, WI 53207. The listed phone number is (414) 486-1900.

What is Mark Skier's specialty?

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

Is Mark Skier enrolled in Medicare?

Yes. Mark Skier is registered in the Medicare PECOS enrollment system.

What insurance does Mark Skier accept?

Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, CareSource (Common Ground Healthcare), HealthPartners and Quartz and 1 other insurer list Mark Skier 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 Mark Skier affiliated with any hospitals?

According to CMS data, Mark Skier is affiliated with Aurora St Lukes Medical Center and West Allis Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Mark Skier was last updated on June 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.