Robert Siniakowicz, MD
NPI 1689776122 · Internal Medicine Physician · Hamilton Square, NJ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Siniakowicz, MD is a Internal Medicine Physician provider in Hamilton Square, NJ (NPI 1689776122).
Provider details
- NPI number
- 1689776122
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MA 69602 (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
19 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
1,845 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 | 823 | $137 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 317 | $141 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 225 | $97 |
| Administration of Influenza Virus VaccineG0008 | 129 | $34 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 103 | $15 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 154 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 761 | 229 |
| Levothyroxine Sodium | 492 | 131 |
| Atorvastatin Calcium | 456 | 142 |
| Amlodipine Besylate | 374 | 118 |
| Losartan Potassium | 340 | 101 |
| Pantoprazole Sodium | 273 | 96 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$121 across 8 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
- 2006-09-04
- Last updated
- 2007-07-08
Frequently asked questions
- What is Robert Siniakowicz's NPI number?
- Robert Siniakowicz's National Provider Identifier (NPI) is 1689776122, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Siniakowicz's specialty?
- Robert Siniakowicz is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Siniakowicz located?
- Robert Siniakowicz's practice location on file with NPPES is 2275 Highway 33, Hamilton Square, NJ 08690-1748.
- What is Robert Siniakowicz's phone number?
- The practice phone number listed in the NPPES registry for Robert Siniakowicz is (609) 586-6006.
- Does Robert Siniakowicz accept Medicare?
- Robert Siniakowicz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Siniakowicz's NPI active?
- Yes — Robert Siniakowicz's NPI (1689776122) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.