David Maruska, MD
NPI 1508848847 · Family Medicine Physician · Oshkosh, WI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Maruska, MD is a Family Medicine Physician provider in Oshkosh, WI (NPI 1508848847).
Provider details
- NPI number
- 1508848847
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 28554 (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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
159 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 78 | $85 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 29 | $121 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 22 | $61 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 16 | $120 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 14 | $122 |
Typical Medicare-allowed amounts for these services range $61–$122 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 94 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 255 | 76 |
| Lisinopril | 221 | 64 |
| Metformin Hcl | 187 | 47 |
| Amlodipine Besylate | 162 | 48 |
| Levothyroxine Sodium | 162 | 41 |
| Omeprazole | 159 | 50 |
| Metoprolol Succinate |
Practice location
Mailing address
Additional practice locations (1)
- 420 E Division StFond Du Lac, WI 54935-4560Phone: (920) 926-8200
Registry dates
- Enumerated
- 2005-11-14
- Last updated
- 2025-10-31
- Certified
- 2025-10-31
Frequently asked questions
- What is David Maruska's NPI number?
- David Maruska's National Provider Identifier (NPI) is 1508848847, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Maruska's specialty?
- David Maruska is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Maruska located?
- David Maruska's practice location on file with NPPES is 600 N Westhaven Dr, Oshkosh, WI 54904-6926.
- What is David Maruska's phone number?
- The practice phone number listed in the NPPES registry for David Maruska is (920) 237-5000.
- Does David Maruska accept Medicare?
- David Maruska is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Maruska's NPI active?
- Yes — David Maruska's NPI (1508848847) is active in the NPPES registry as of the last update on 2025-10-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.