HAK J KO MD
NPI 1154398055
Psychiatry & Neurology - Psychiatry in Williamsville, NY
About Hak J Ko Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HAK J KO MD (NPI 1154398055) is an individual psychiatry provider in Williamsville, New York, licensed in New York (137567) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 6
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Hak J Ko Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Hak Ko reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Niagara Falls, NY 14302
- Reassigned Medicare billing, New York enrollment
- Also billed through NPI 1982659256 (New York)
- 156 clinicians in this Medicare group
Las Cruces, NM 88012
- Reassigned Medicare billing, New Mexico enrollment
- 30 clinicians in this Medicare group
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 14221 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WILLIAMSVILLE, NY 14221
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 Hak Ko's NPI number?
The NPI number for Hak Ko is 1154398055. It was assigned to this individual provider in the NPPES registry on March 1, 2006.
Where is Hak Ko located?
Hak Ko practices at 5687 Main St Suite 102, Williamsville, NY 14221. The listed phone number is (716) 204-3541.
What is Hak Ko's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Hak Ko enrolled in Medicare?
Yes. Hak Ko is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Hak Ko's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Hak Ko reassigns Medicare benefits to 2 organizations: Niagara Falls Memorial Medical Center (Niagara Falls, NY) and Bhc Mesilla Valley Hospital LLC (Las Cruces, NM). 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 Hak Ko's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Hak Ko accept?
Health plans from Imperial Insurance Companies, Inc. list Hak Ko 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.
When was this NPI record last updated?
The NPPES record for Hak Ko was last updated on July 5, 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.
# Hak J Ko, MD · NPI 1154398055
Psychiatry physician in Williamsville, New York. Individual provider, active in the CMS NPPES registry since March 1, 2006.
## Identity
- **NPI:** 1154398055 (Entity type: Individual)
- **Enumerated:** March 1, 2006
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** 137567 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 5687 MAIN ST, SUITE 102, Williamsville, NY 14221-5517
- **Phone:** (716) 204-3541 · **Fax:** (716) 204-3542
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Niagara Falls Memorial Medical Center (NPI 1285717298, Niagara Falls, NY); Bhc Mesilla Valley Hospital LLC (NPI 1841205671, Las Cruces, NM) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 5, 2010
- **Other identifiers:** Medicare ID-Type Unspecified 080102 (NY); Other 1509258 (NY); Medicaid 00685534 (NY); and 3 more
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Source: [NPI Profile](https://npiprofile.com/npi/1154398055) · Data from the CMS NPPES public registry.