MARYLOU KILLIAN NP
NPI 1154375533
Nurse Practitioner - Primary Care in Margaretville, NY
About Marylou Killian Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARYLOU KILLIAN NP (NPI 1154375533) is an individual primary care provider in Margaretville, New York, licensed in New York (F331319) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1995).
NPPES Registry Identity
Specialties & Licenses
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
Marylou Killian Np 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.
Medicare Billing Reassignments
3Medicare enrollment records show Marylou Killian reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Poughkeepsie, NY 12601
- Reassigned Medicare billing, New York enrollment
- 201 clinicians in this Medicare group
Binghamton, NY 13905
- Reassigned Medicare billing, New York enrollment
- 110 clinicians in this Medicare group
Mount Kisco, NY 10549
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Optum Medical Care PC
- 1,601 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.
Areas of Expertise CMS Part B claims 11
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 12455 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 17
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MARGARETVILLE, NY 12455
MARGARETVILLE, NY 12455
MARGARETVILLE, NY 12455
MARGARETVILLE, NY 12455
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 Marylou Killian's NPI number?
The NPI number for Marylou Killian is 1154375533. It was assigned to this individual provider in the NPPES registry on May 20, 2006.
Where is Marylou Killian located?
Marylou Killian practices at 42084 State Highway 28, Margaretville, NY 12455. The listed phone number is (845) 586-2631.
What is Marylou Killian's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Primary Care, with taxonomy code 363LP2300X.
Is Marylou Killian enrolled in Medicare?
Yes. Marylou Killian 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 Marylou Killian's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marylou Killian reassigns Medicare benefits to 3 organizations: Emergency Physician Services Of New York, P.C. (Poughkeepsie, NY), Exigence Medical Of Binghamton PLLC (Binghamton, NY) and Optum Medical Care, P.C. (Mount Kisco, NY). 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 Marylou Killian'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 Marylou Killian was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.
# Marylou Killian, NP · NPI 1154375533
Primary Care physician in Margaretville, New York. Individual provider, active in the CMS NPPES registry since May 20, 2006.
## Identity
- **NPI:** 1154375533 (Entity type: Individual)
- **Enumerated:** May 20, 2006
- **Primary specialty:** Nurse Practitioner - Primary Care · taxonomy 363LP2300X
- **State license:** F331319 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 42084 STATE HIGHWAY 28, Margaretville, NY 12455-2820
- **Phone:** (845) 586-2631 · **Fax:** (845) 586-2976
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Emergency Physician Services Of New York, P.C. (NPI 1093759847, Poughkeepsie, NY); Exigence Medical Of Binghamton PLLC (NPI 1659464758, Binghamton, NY); Optum Medical Care, P.C. (NPI 1982643003, Mount Kisco, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1995
## Record status
- **NPPES last updated:** July 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1154375533) · Data from the CMS NPPES public registry.