Douglas Sieminski, DO
NPI 1922066125 · Family Medicine Physician · Newton, NJ
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Sieminski, DO is a Family Medicine Physician provider in Newton, NJ (NPI 1922066125).
Provider details
- NPI number
- 1922066125
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- MB07893100 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
6,454 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 1,089 | $140 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 837 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 760 | $10 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 735 | $99 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 595 | $13 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 515 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 132 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 993 | 269 |
| Levothyroxine Sodium | 699 | 152 |
| Lisinopril | 575 | 150 |
| Metformin Hcl | 366 | 106 |
| Amlodipine Besylate | 343 | 94 |
| Alprazolam | 289 | 80 |
| Escitalopram Oxalate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$818 across 55 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-04
- Last updated
- 2021-12-11
- Certified
- 2021-12-11
Frequently asked questions
- What is Douglas Sieminski's NPI number?
- Douglas Sieminski's National Provider Identifier (NPI) is 1922066125, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Sieminski's specialty?
- Douglas Sieminski is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Sieminski located?
- Douglas Sieminski's practice location on file with NPPES is 33 Newton Sparta Rd, Newton, NJ 07860-2764.
- What is Douglas Sieminski's phone number?
- The practice phone number listed in the NPPES registry for Douglas Sieminski is (973) 383-2244.
- Does Douglas Sieminski accept Medicare?
- Douglas Sieminski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Sieminski's NPI active?
- Yes — Douglas Sieminski's NPI (1922066125) is active in the NPPES registry as of the last update on 2021-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.