JI DONG BAI MD
NPI 1902366230
Pathology - Anatomic Pathology in Stony Brook, NY

Q: What is Ji Dong Bai's NPI number?

The NPI number for Ji Dong Bai is 1902366230. It was assigned to this individual provider in the NPPES registry on March 22, 2019. The provider is also known as Karen Bai.

Q: What is Ji Dong Bai's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology, with taxonomy code 207ZP0101X.

Q: When was this NPI record last updated?

The NPPES record for Ji Dong Bai was last updated on July 5, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since March 22, 2019PECOS EnrolledAccepts Medicare Assignment

101 NICOLLS RD, LEVEL 2, STONY BROOK, NY 11794(631) 538-5856 Get Directions Write a Review

NPPES record last updated: July 5, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 5, 2022, Aug 1, 2019, Mar 22, 2019 (3 updates tracked since 2019).

On this page

About Ji Dong Bai Md NPPES

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

JI DONG BAI MD (NPI 1902366230) is an individual anatomic pathology provider in Stony Brook, New York, licensed in New York (315830) and active in the NPI registry since March 2019. She is enrolled in Medicare PECOS, is affiliated with Suny/stony Brook University Hospital, and is a graduate of Other (2019).

NPPES Registry Identity

NPI1902366230

Entity TypeIndividualFemale

Primary Taxonomy207ZP0101X

Provider Legal NameJI DONG BAICredential: MD

Location Address101 NICOLLS RD, LEVEL 2Stony Brook, NY 11794-7025

Mailing Address23 Shadetree Lane Right Side AptStony Brook, NY 11790-1831 · (631) 538-5856

Phone(631) 538-5856

Sole ProprietorNo

Medical School CMSOtherGraduated 2019

Enumeration DateMarch 22, 2019

Last NPPES UpdateJuly 5, 20223 updates tracked since enumeration

NPPES CertifiedJuly 5, 2022

✔ NPI 1902366230 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic PathologyAllopathic & Osteopathic Physicians

Taxonomy Code207ZP0101X

License✔ Licensed in NY · 315830

Definition

A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

101 NICOLLS RD, LEVEL 2, Stony Brook, NY 11794

Open in Google Maps ↗

Other Names 1

Other Name (5)Karen Bai

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Cigna Healthcare.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

Ji Dong Bai 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 ID2860721149

PECOS Enrollment IDI20220822002397, I20260701002707

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 Ji Dong Bai reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Stony Brook Pathologists, University Faculty Practice Corporation

0.5 mi

Anatomic Pathology & Clinical Pathology

SUNY @ STONY BROOK, BHS, L9, RM 140
Stony Brook, NY 11790

Reassigned Medicare billing, New York enrollment
25 clinicians in this Medicare group

NPI 1912944794 (631) 444-3000

Duke Health Integrated Practice, Inc

460 mi

Foot and Ankle Surgery

2609 N DUKE ST STE 301
Durham, NC 27704

Reassigned Medicare billing, North Carolina enrollment
3,671 clinicians in this Medicare group

NPI 1518725936 (919) 477-9333

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 7

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.

Microscopic genetic analysis of tumor, manual 88360

Microscopic genetic analysis of a tumor involves examining your tumor's genes under a microscope. This helps identify specific genetic changes in the tumor cells. This information can aid in diagnosing, predicting disease progression, and determining the most effective treatment options.

176 services44 patients

Pathology examination of tissue using a microscope, moderately high complexity 88307

A pathology examination of tissue with moderate complexity involves a detailed study of a small tissue sample from your body. Using a microscope, experts analyze the tissue's structure and cells to identify any abnormalities. This helps in diagnosing various health conditions accurately.

119 services36 patients

Pathology examination of tissue using a microscope, intermediate complexity 88305

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

113 services74 patients

Special stained specimen slides to examine tissue, each additional procedure 88341

Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.

102 services37 patients

Special stained specimen slides to examine tissue, initial procedure 88342

This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.

66 services50 patients

Surgical pathology consultation and report on referred slides prepared elsewhere 88321

A surgical pathology consultation involves reviewing slides prepared at a different lab to confirm or clarify a diagnosis. It's a second opinion to ensure accuracy. A report with findings and interpretations is then provided for your doctor's reference.

26 services26 patients

Hospital Affiliations CMS Care Compare 2

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

Suny/Stony Brook University Hospital

Acute Care Hospitals · Stony Brook, NY

4/5 CMS rating

OwnershipGovernment - State

CMS Certification Number330393

LocationHealth Sciences Center SunyStony Brook, NY 11794 · Suffolk County

Emergency services Birthing friendly

Duke University Hospital

Acute Care Hospitals · Durham, NC

5/5 CMS rating

OwnershipProprietary

CMS Certification Number340030

Location2100 Erwin RdDurham, NC 27705 · Durham County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11794 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.

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 Ji Dong Bai's NPI number?

The NPI number for Ji Dong Bai is 1902366230. It was assigned to this individual provider in the NPPES registry on March 22, 2019. The provider is also known as Karen Bai.

Where is Ji Dong Bai located?

Ji Dong Bai practices at 101 Nicolls Rd, Level 2, Stony Brook, NY 11794. The listed phone number is (631) 538-5856.

What is Ji Dong Bai's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology, with taxonomy code 207ZP0101X.

Is Ji Dong Bai enrolled in Medicare?

Yes. Ji Dong Bai 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 Ji Dong Bai's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ji Dong Bai reassigns Medicare benefits to 2 organizations: Stony Brook Pathologists, University Faculty Practice Corporation (Stony Brook, NY) and Duke Health Integrated Practice, Inc (Durham, NC). 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 Ji Dong Bai's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ji Dong Bai accept?

Health plans from Cigna Healthcare list Ji Dong Bai 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 Ji Dong Bai affiliated with any hospitals?

According to CMS data, Ji Dong Bai is affiliated with Suny/Stony Brook University Hospital and Duke University Hospital.

When was this NPI record last updated?

The NPPES record for Ji Dong Bai was last updated on July 5, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.