DR. ROBERT MIROSLAW SINIAKOWICZ MD
NPI 1689776122
Internal Medicine in Hamilton Square, NJ

Q: What is Robert Siniakowicz's NPI number?

The NPI number for Robert Siniakowicz is 1689776122. It was assigned to this individual provider in the NPPES registry on September 4, 2006.

Q: What is Robert Siniakowicz's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Active since September 04, 2006PECOS EnrolledAccepts Medicare Assignment

2275 HIGHWAY 33, SUITE 301, HAMILTON SQUARE, NJ 08690(609) 586-6006 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Robert Miroslaw Siniakowicz Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ROBERT MIROSLAW SINIAKOWICZ MD (NPI 1689776122) is an individual internal medicine provider in Hamilton Square, New Jersey, licensed in New Jersey (MA 69602) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with University Medical Center Of Princeton At Plainsboro, and is a graduate of Other (1991).

NPPES Registry Identity

NPI1689776122

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. ROBERT MIROSLAW SINIAKOWICZCredential: MD

Location Address2275 HIGHWAY 33, SUITE 301Hamilton Square, NJ 08690-1748

Mailing Address8 Chaucer CtWest Windsor, NJ 08550-2232 · (609) 275-4788

Phone(609) 586-6006

Sole ProprietorNo

Medical School CMSOtherGraduated 1991

Enumeration DateSeptember 4, 2006

Last NPPES UpdateJuly 8, 2007

✔ NPI 1689776122 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in NJ · MA 69602

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

2275 HIGHWAY 33, Hamilton Square, NJ 08690

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Robert Miroslaw Siniakowicz Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7214911809

PECOS Enrollment IDI20040614000101

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Robert Siniakowicz reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Princeton Healthcare Affiliated Physicians PC

Same address

Internal Medicine

2275 HIGHWAY 33, STE 301
Hamilton Square, NJ 08690

Reassigned Medicare billing, New Jersey enrollment
249 clinicians in this Medicare group

NPI 1891106498 (609) 586-6006

Clinical Health Care Associates Of New Jersey, PC

15 mi

Obstetrics & Gynecology

1203 LANGHORNE NEWTOWN RD STE 226
Langhorne, PA 19047

Reassigned Medicare billing, New Jersey enrollment
793 clinicians in this Medicare group

NPI 1538728357 (610) 902-1730

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 12

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

823 services424 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

317 services317 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

225 services165 patients

Influenza vaccine split virus, preservative free 90662

The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.

129 services128 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

129 services128 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

103 services102 patients

Telephone medical discussion with physician, 11-20 minutes 99442

This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.

86 services76 patients

Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use 90677

The Pneumococcal Conjugate Vaccine (PCV20) is a shot given to protect against 20 types of bacteria that can cause serious infections like pneumonia and meningitis. It's administered through a muscle, usually in the arm. It's important for overall health.

48 services47 patients

Administration of pneumococcal vaccine G0009

The pneumococcal vaccine helps protect against pneumococcal bacteria, which can cause severe infections like pneumonia and meningitis. The vaccine is given as an injection, typically in the arm. It's recommended for infants, older adults, and those with certain health conditions.

47 services46 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

21 services21 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

13 services13 patients

Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment G0402

An Initial Preventive Physical Examination, also known as a "Welcome to Medicare" visit, is a one-time, face-to-face visit during your first 12 months of Medicare enrollment. It includes a review of your health, as well as education and counseling about preventive services and further screenings.

11 services11 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

University Medical Center Of Princeton At Plainsboro

Acute Care Hospitals · Plainsboro, NJ

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number310010

LocationOne-Five Plainsboro RoadPlainsboro, NJ 08536 · Middlesex County

Emergency services Birthing friendly

Capital Health Medical Center - Hopewell

Acute Care Hospitals · Pennington, NJ

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number310044

LocationOne Capital WayPennington, NJ 08534 · Mercer County

Emergency services Birthing friendly

Robert Wood Johnson University Hospital At Hamilton

Acute Care Hospitals · Hamilton, NJ

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number310110

LocationOne Hamilton Health PlaceHamilton, NJ 08690 · Mercer County

Emergency services

Hospital Of Univ Of Pennsylvania

Acute Care Hospitals · Philadelphia, PA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390111

Location34th & Spruce StsPhiladelphia, PA 19104 · Philadelphia County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 08690 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$140.34 typical visit price

range $61.59 – $185.05

Typical copayment $35.08 (range $15.39 – $46.26)

Most-billed visit code 99204

Established Patient

$107.94 typical visit price

range $20.08 – $150.98

Typical copayment $26.98 (range $5.02 – $37.74)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

26 suppliers80 claims182 services$5.71 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

22 suppliers45 claims50 services$0.89 avg. paid by Medicare

Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553

DME-Other DME · category DE017N

3 suppliers32 claims33 services$195.52 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MISS YVONNE BERRIO RN,MS,NPC

Nurse Practitioner

2275 HIGHWAY 33, SUITE 301
HAMILTON SQUARE, NJ 08690

Mercer County (609) 586-6006

DR. JENNIFER LORI DEPALMA DC

Chiropractor

2275 HIGHWAY 33, SUITE 304
HAMILTON, NJ 08690

Mercer County (609) 587-9900

DR. JOSEPH DEBLASIO M.D.

Internal Medicine

2275 HIGHWAY 33, SUITE 301
HAMILTON SQUARE, NJ 08690

Mercer County (609) 586-6006

HAMILTON MEDICAL GROUP, P.C.

Internal Medicine

2275 HIGHWAY 33, SUITE 301
HAMILTON SQUARE, NJ 08690

Mercer County (609) 586-6006

PRINCETON HEALTHCARE AFFILIATED PHYSICIANS PC

Internal Medicine

2275 HIGHWAY 33, STE 301
HAMILTON SQUARE, NJ 08690

Mercer County (609) 586-6006

CHIRO CARE CHIROPRACTIC AND REHABILITATION CENTER LLC

Chiropractor

2275 HIGHWAY 33, SUITE 304
HAMILTON, NJ 08690

Mercer County (609) 587-9900

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Robert Siniakowicz's NPI number?

The NPI number for Robert Siniakowicz is 1689776122. It was assigned to this individual provider in the NPPES registry on September 4, 2006.

Where is Robert Siniakowicz located?

Robert Siniakowicz practices at 2275 Highway 33 Suite 301, Hamilton Square, NJ 08690. The listed phone number is (609) 586-6006.

What is Robert Siniakowicz's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Robert Siniakowicz enrolled in Medicare?

Yes. Robert Siniakowicz is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Robert Siniakowicz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Robert Siniakowicz reassigns Medicare benefits to 2 organizations: Princeton Healthcare Affiliated Physicians PC (Hamilton Square, NJ) and Clinical Health Care Associates Of New Jersey, PC (Langhorne, PA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Robert Siniakowicz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Robert Siniakowicz accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Robert Siniakowicz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Robert Siniakowicz affiliated with any hospitals?

According to CMS data, Robert Siniakowicz is affiliated with University Medical Center Of Princeton At Plainsboro, Capital Health Medical Center - Hopewell, Robert Wood Johnson University Hospital At Hamilton and Hospital Of Univ Of Pennsylvania.

When was this NPI record last updated?

The NPPES record for Robert Siniakowicz was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.