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KEITH C WILLIAMS PMHNP
NPI 1649701533
Nurse Practitioner - Psychiatric/Mental Health in Elmira, NY

Active since March 23, 2017PECOS EnrolledAccepts Medicare Assignment
200 MADISON AVE STE 2B, ELMIRA, NY 14901(607) 732-1310(607) 733-0940 Get Directions Write a Review

NPPES record last updated: September 11, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 11, 2024, Mar 23, 2017 (2 updates tracked since 2017).

About Keith C Williams Pmhnp NPPES

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

KEITH C WILLIAMS PMHNP (NPI 1649701533) is an individual psychiatric/mental health provider in Elmira, New York, licensed in New York (405911) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with Arnot Ogden Medical Center, and is a graduate of Other (2024).

NPPES Registry Identity

NPI1649701533
Entity TypeIndividualMale
Primary Taxonomy363LP0808X
Provider Legal NameKEITH C WILLIAMSCredential: PMHNP
Location Address200 MADISON AVE STE 2BElmira, NY 14901-3219
Mailing Address600 Ivy St Ste 206Elmira, NY 14905-1627 · (607) 271-2050 · Fax (607) 271-2071
Phone(607) 732-1310
Fax(607) 733-0940
Sole ProprietorNo
Medical School CMSOtherGraduated 2024
Enumeration DateMarch 23, 2017
Last NPPES UpdateSeptember 11, 20242 updates tracked since enumeration
NPPES CertifiedSeptember 11, 2024
✔ NPI 1649701533 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in NY · 405911
200 MADISON AVE STE 2B, Elmira, NY 14901
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.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

Keith C Williams Pmhnp 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 ID8022556083
PECOS Enrollment IDI20240821002956
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 Keith Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Arnot Ogden Medical Center
1.6 mi
General Acute Care Hospital
600 ROE AVE
Elmira, NY 14905
  • Reassigned Medicare billing, New York enrollment
  • 245 clinicians in this Medicare group
NPI 1083605661 (607) 737-4100

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

Hospital Affiliations CMS Care Compare

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

Arnot Ogden Medical Center

Acute Care Hospitals · Elmira, NY
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330090
Location600 Roe AvenueElmira, NY 14905 · Chemung County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 14901 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
$84.93 typical visit price
range $54.87 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.08 typical visit price
range $17.54 – $136.14
Typical copayment $24.27 (range $4.38 – $34.03)
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 5

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

KHIZRAN AGHA MD
Student in an Organized Health Care Education/Training Program
200 MADISON AVE STE 2B
ELMIRA, NY 14901
Chemung County (408) 726-3334
DR. WILLIAM EDWARD CLACK MD
Dermatology
200 MADISON AVE STE 2B
ELMIRA, NY 14901
Chemung County (607) 732-1310
LEWIS JOSEPH CABIBI II DO
Family Medicine
200 MADISON AVE STE 2B
ELMIRA, NY 14901
Chemung County (607) 732-1310
BRITNEE LASHELLE MONTICELLO DO
Student in an Organized Health Care Education/Training Program
200 MADISON AVE STE 2B
ELMIRA, NY 14901
Chemung County (607) 732-1310
DR. DONALD RAY FOSTER D.O.
Family Medicine
200 MADISON AVE STE 2B
ELMIRA, NY 14901
Chemung County (607) 732-1310

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 Keith Williams's NPI number?

The NPI number for Keith Williams is 1649701533. It was assigned to this individual provider in the NPPES registry on March 23, 2017.

Where is Keith Williams located?

Keith Williams practices at 200 Madison Ave Ste 2B, Elmira, NY 14901. The listed phone number is (607) 732-1310.

What is Keith Williams's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is Keith Williams enrolled in Medicare?

Yes. Keith Williams 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 organization bills Medicare for Keith Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Keith Williams reassigns Medicare benefits to Arnot Ogden Medical Center (Elmira, 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 Keith Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Keith Williams accept?

Health plans from Oscar Health list Keith Williams 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 Keith Williams affiliated with any hospitals?

According to CMS data, Keith Williams is affiliated with Arnot Ogden Medical Center.

When was this NPI record last updated?

The NPPES record for Keith Williams was last updated on September 11, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.