Mark Skier, M.D.
NPI 1346234812 · Internal Medicine Physician · Bayview, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Skier, M.D. is a Internal Medicine Physician provider in Bayview, WI (NPI 1346234812).
Provider details
- NPI number
- 1346234812
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 34018 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
604 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 313 | $114 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 126 | $112 |
| Administration of Influenza Virus VaccineG0008 | 45 | $30 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 36 | $15 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 25 | $81 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 160 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 753 | 207 |
| Amlodipine Besylate | 566 | 151 |
| Losartan Potassium | 553 | 145 |
| Metoprolol Succinate | 401 | 110 |
| Levothyroxine Sodium | 369 | 100 |
| Lisinopril | 322 | 83 |
| Rosuvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-09
- Last updated
- 2025-06-26
- Certified
- 2025-06-26
Frequently asked questions
- What is Mark Skier's NPI number?
- Mark Skier's National Provider Identifier (NPI) is 1346234812, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Skier's specialty?
- Mark Skier is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Skier located?
- Mark Skier's practice location on file with NPPES is 3119 S Clement Ave, Bayview, WI 53207-2835.
- What is Mark Skier's phone number?
- The practice phone number listed in the NPPES registry for Mark Skier is (414) 486-1900.
- Does Mark Skier accept Medicare?
- Mark Skier is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Skier's NPI active?
- Yes — Mark Skier's NPI (1346234812) is active in the NPPES registry as of the last update on 2025-06-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.