Quick answers
- Does Douglas P. Sieminski accept Medicare assignment?
- Yes. Medicare's clinician data says Douglas P. Sieminski accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Douglas P. Sieminski see?
- In 2024, CMS data shows 829 Original Medicare patients and 6,702 services for Douglas P. Sieminski. This counts Original Medicare only and measures volume, not quality.
- What is Douglas P. Sieminski's NPI number?
- 1922066125. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Douglas P. Sieminski, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 829 |
|---|---|
| Services billed to Medicare | 6,702 |
| Different services or procedures | 67 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,089 services
- Insertion of needle into vein for collection of blood sample (36415)837 services
- Blood test, comprehensive group of blood chemicals (80053)760 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)735 services
- Blood test, lipids (cholesterol and triglycerides) (80061)595 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure71%
- Ischemic heart disease38%
- Arthritis34%
- Diabetes24%
- Chronic kidney disease23%
Hospitals where Douglas P. Sieminski works
Medicare's Facility Affiliation Data lists Douglas P. Sieminski at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Morristown Medical CenterMorristown, NJ · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 310015
- Newton Medical CenterNewton, NJ · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 310028
- Saint Clare's Hospital/ Denville CampusDenville, NJ · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 310050
- The University HospitalNewark, NJ · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 310119
Practice locations
Addresses where Douglas P. Sieminski is enrolled with Medicare (CMS data updated October 2, 2026).
- 33 Newton Sparta Rd, Suite 1Newton, NJ 07860 (973) 383‑2244
Group practices
Medicare enrollment lists Douglas P. Sieminski as a member of this group (CMS data updated October 2, 2026).
- Consensus Medical Group LLC137 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Newton
Clinicians with the same Medicare primary specialty in Newton, NJ — not a recommendation.
Other clinicians in Consensus Medical Group LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | New York College Of Osteo Medicine Of New York Institute Of Technology |
| Graduation year | 2003 (23 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1922066125 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians