DILLAN SOOYONG CHAI
NPI 1013361864
Internal Medicine in Bronx, NY

Q: What is Dillan Chai's NPI number?

The NPI number for Dillan Chai is 1013361864. It was assigned to this individual provider in the NPPES registry on April 19, 2016.

Q: What is Dillan Chai's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Dillan Chai was last updated on July 15, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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 April 19, 2016PECOS Enrolled

234 E 149TH ST, DEPARTMENT OF INTERNAL MEDICINE, SUITE 8-20, BRONX, NY 10451(718) 579-5016(718) 579-4836 Get Directions Write a Review

NPPES record last updated: July 15, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Dillan Sooyong Chai NPPES

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

DILLAN SOOYONG CHAI (NPI 1013361864) is an individual internal medicine provider in Bronx, New York, licensed in New York (301317) and active in the NPI registry since April 2016. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1013361864

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDILLAN SOOYONG CHAI

Location Address234 E 149TH ST, DEPARTMENT OF INTERNAL MEDICINE, SUITE 8-20Bronx, NY 10451-5504

Mailing Address234 E 149th St, Department Of Internal Medicine, Suite 8-20Bronx, NY 10451-5504 · (718) 579-5016 · Fax (718) 579-4836

Phone(718) 579-5016

Fax(718) 579-4836

Sole ProprietorYes

Enumeration DateApril 19, 2016

Last NPPES UpdateJuly 15, 2020

NPPES CertifiedJuly 15, 2020

✔ NPI 1013361864 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in NY · 301317

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.

234 E 149TH ST, Bronx, NY 10451

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dillan Sooyong Chai is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

Downtown Bronx Medical Associates PC

Same address

Emergency Medical Services

234 E 149TH ST, STE 8D200
Bronx, NY 10451

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

NPI 1689618407 (718) 576-6200

Astrana Care Hospitalists, A Medical Corporation

2,448 mi

Hospitalist

1680 S GARFIELD AVE # 204
Alhambra, CA 91801

Reassigned Medicare billing, California enrollment
Medicare enrollment name: Apollomed Hospitalists A Medical Corporation
53 clinicians in this Medicare group

NPI 1265658595 (626) 943-6476

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

164 services52 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

129 services47 patients

Hospital discharge day management, 30 minutes or less 99238

Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.

37 services37 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

36 services36 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

36 services35 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

16 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10451 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 20

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

DR. THOMAS HENRY PARRY M.D.

Emergency Medicine