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HIEJIN YOON MD
NPI 1396894713
Psychiatry & Neurology - Psychiatry in Valhalla, NY

Active since January 09, 2007PECOS Enrolled
95 GRASSLANDS RD, NYMC - BEHAVIORAL HEALTH CENTER, FACULTY PSYCHIATRIC AS, VALHALLA, NY 10595(914) 493-7000(914) 493-1015 Get Directions Write a Review

NPPES record last updated: August 31, 2010. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Hiejin Yoon Md NPPES

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

HIEJIN YOON MD (NPI 1396894713) is an individual psychiatry provider in Valhalla, New York, licensed in Wisconsin (49417-020) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1396894713
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameHIEJIN YOONCredential: MD
Location Address95 GRASSLANDS RD, NYMC - BEHAVIORAL HEALTH CENTER, FACULTY PSYCHIATRIC ASValhalla, NY 10595-1652
Mailing Address95 Grasslands Rd, Nymc - Behavioral Health Center, Faculty Psychiatric AsValhalla, NY 10595-1646 · (914) 493-7000 · Fax (914) 493-1015
Phone(914) 493-7000
Fax(914) 493-1015
Sole ProprietorYes
Enumeration DateJanuary 9, 2007
Last NPPES UpdateAugust 31, 2010
✔ NPI 1396894713 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in WI · 49417-020
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
Also ListedGeneral PracticeTaxonomy 208D00000X · License 49417-020 (WI)
95 GRASSLANDS RD, Valhalla, NY 10595
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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)

Hiejin Yoon Md 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 Reassignment

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

Westchester Medical Center Advanced Physician Services PC
0.4 mi
Anesthesiology
100 WOODS RD, TAYLOR PAVILION - ROOM M229
Valhalla, NY 10595
  • Reassigned Medicare billing, New York enrollment
  • 1,663 clinicians in this Medicare group
NPI 1740687458 (914) 493-2844

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10595 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
$203.53 typical visit price
range $67.40 – $203.53
Typical copayment $50.88 (range $16.85 – $50.88)
Most-billed visit code 99205
Established Patient
$83.44 typical visit price
range $21.66 – $164.45
Typical copayment $20.86 (range $5.41 – $41.11)
Most-billed visit code 99213
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.

MRS. DEIRDRE MARY MULLEN CRNA
Nurse Practitioner (Psychiatric/Mental Health)
95 GRASSLANDS RD
VALHALLA, NY 10595
Westchester County (914) 493-7693
MRS. STEPHANIE M DANYKO FNP
Nurse Practitioner (Acute Care)
95 GRASSLANDS RD, 7TH FLOOR ONCOLOGY WMC
VALHALLA, NY 10595
Westchester County (914) 493-7488
DR. REEJA VEMBENIL
Pediatrics (Neonatal-Perinatal Medicine)
95 GRASSLANDS RD, RNICU, 2ND FLOOR, MF CHILDREN'S HOSP AT WMC
VALHALLA, NY 10595
Westchester County (914) 493-8558
SUSAN SKRYPACK FNP
Nurse Practitioner (Family)
95 GRASSLANDS RD
VALHALLA, NY 10595
Westchester County (914) 493-1031
JOHN ROBINSON NP
Nurse Practitioner
95 GRASSLANDS RD, WESTCHESTER MEDICAL CENTER
VALHALLA, NY 10595
Westchester County (914) 493-7000
ANA EVELYN RICCIO PHYSICIAN ASSISTANT
Physician Assistant (Surgical)
95 GRASSLANDS RD
VALHALLA, NY 10595
Westchester County (914) 493-6200
MS. ANNE WARGO
Nurse Practitioner (Family)
95 GRASSLANDS RD
VALHALLA, NY 10595
Westchester County (914) 493-7000
ABDUL HALEEM MD
Pediatrics (Neonatal-Perinatal Medicine)
95 GRASSLANDS RD
VALHALLA, NY 10595
Westchester County (914) 493-8558

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 Hiejin Yoon's NPI number?

The NPI number for Hiejin Yoon is 1396894713. It was assigned to this individual provider in the NPPES registry on January 9, 2007.

Where is Hiejin Yoon located?

Hiejin Yoon practices at 95 Grasslands Rd Nymc - Behavioral Health Center, Faculty Psychiatric As, Valhalla, NY 10595. The listed phone number is (914) 493-7000.

What is Hiejin Yoon's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Hiejin Yoon enrolled in Medicare?

Yes. Hiejin Yoon is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Hiejin Yoon's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hiejin Yoon reassigns Medicare benefits to Westchester Medical Center Advanced Physician Services PC (Valhalla, 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 Hiejin Yoon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Hiejin Yoon was last updated on August 31, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.