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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. CHRISTINE NWAISER
NPI 1063974236
Internal Medicine - Sleep Medicine in Port Jefferson Station, NY

Active since April 04, 2019PECOS EnrolledAccepts Medicare Assignment
1500 ROUTE 112 STE A, PORT JEFFERSON STATION, NY 11776(631) 476-2721 Get Directions Write a Review

NPPES record last updated: October 11, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 11, 2026, Jun 13, 2023, Apr 4, 2019 (3 updates tracked since 2019).

About Dr. Christine Nwaiser NPPES

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

DR. CHRISTINE NWAISER (NPI 1063974236) is an individual sleep medicine provider in Port Jefferson Station, New York, licensed in New York (318032) and active in the NPI registry since April 2019. She is enrolled in Medicare PECOS, is affiliated with John T Mather Memorial Hospital Of Port Jefferson, and maintains a secondary practice location in Great River.

NPPES Registry Identity

NPI1063974236
Entity TypeIndividualFemale
Primary Taxonomy207RS0012X
Provider Legal NameDR. CHRISTINE NWAISER
Location Address1500 ROUTE 112 STE APort Jefferson Station, NY 11776-8055
Mailing Address100 Church RdGreat River, NY 11739-3002 · (631) 988-2819
Phone(631) 476-2721
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateApril 4, 2019
Last NPPES UpdateOctober 11, 20263 updates tracked since enumeration
NPPES CertifiedOctober 11, 2026
✔ NPI 1063974236 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Sleep MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RS0012X
License✔ Licensed in NY · 318032
Definition
An Internist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders. Sleep specialists treat patients of any age and use multidisciplinary approaches. Disorders managed by sleep specialists include, but are not limited to, sleep related breathing disorders, insomnia, hypersomnias, circadian rhythm sleep disorders, parasomnias and sleep related movement disorders.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1500 ROUTE 112 STE A, Port Jefferson Station, NY 11776
Open in Google Maps ↗

Secondary Practice Location 1

Location 1100 Church RdGreat River, NY 11739-3002 · Phone (631) 988-2819

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. Christine Nwaiser 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 ID1355701020
PECOS Enrollment IDI20230713002728
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 Reassignment

Medicare enrollment records show Christine Nwaiser reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Harbor View Medical Services PC
Same address
Gastroenterology
1500 ROUTE 112 BLDG 6
Port Jefferson Station, NY 11776
  • Reassigned Medicare billing, New York enrollment
  • Also billed through NPI 1306631742 (New York)
  • 68 clinicians in this Medicare group
NPI 1871150193 (631) 686-7890

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 6

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.
108 services74 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.
102 services79 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.
68 services68 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
51 services51 patients
Sleep study in sleep lab (6 years or older) 95810
A sleep study in a sleep lab is a non-invasive overnight test that monitors your body while you sleep. It helps doctors understand your sleep patterns and identify any issues like sleep apnea or insomnia. You'll be connected to equipment that tracks your heart rate, brain waves, breathing, and movements.
35 services35 patients
Sleep study in sleep lab with continuous airway pressure (6 years or older) 95811
A sleep study in a sleep lab with continuous airway pressure is a test for individuals aged 6 and above. It monitors your sleep patterns to check for disorders like sleep apnea. Continuous airway pressure helps keep your airways open while you sleep, improving your breathing.
32 services32 patients

Hospital Affiliations CMS Care Compare

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

John T Mather Memorial Hospital Of Port Jefferson

Acute Care Hospitals · Port Jefferson, NY
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330185
Location75 North Country RoadPort Jefferson, NY 11777 · Suffolk County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11776 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
$154.28 typical visit price
range $67.40 – $203.53
Typical copayment $38.57 (range $16.85 – $50.88)
Most-billed visit code 99204
Established Patient
$117.62 typical visit price
range $21.66 – $164.45
Typical copayment $29.40 (range $5.41 – $41.11)
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.

Other Providers at the Same Location NPPES 2

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

DR. VARVARA BORYUSHKINA MD
Internal Medicine
1500 ROUTE 112 STE A
PORT JEFFERSON STATION, NY 11776
Suffolk County (631) 686-1414
MELISSA LIEBOLD PA-C
Physician Assistant
1500 ROUTE 112 STE A
PORT JEFFERSON STATION, NY 11776
Suffolk County (631) 265-4200

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 Christine Nwaiser's NPI number?

The NPI number for Christine Nwaiser is 1063974236. It was assigned to this individual provider in the NPPES registry on April 4, 2019.

Where is Christine Nwaiser located?

Christine Nwaiser practices at 1500 Route 112 Ste A, Port Jefferson Station, NY 11776. The listed phone number is (631) 476-2721.

What is Christine Nwaiser's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Sleep Medicine, with taxonomy code 207RS0012X.

Is Christine Nwaiser enrolled in Medicare?

Yes. Christine Nwaiser 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 organization bills Medicare for Christine Nwaiser's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Christine Nwaiser reassigns Medicare benefits to Harbor View Medical Services PC (Port Jefferson Station, NY). The 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 Christine Nwaiser's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Christine Nwaiser affiliated with any hospitals?

According to CMS data, Christine Nwaiser is affiliated with John T Mather Memorial Hospital Of Port Jefferson.

When was this NPI record last updated?

The NPPES record for Christine Nwaiser was last updated on October 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 29 days 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.