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PROF. REBEKAH MARA WILLIAMS PMHNP-BC
NPI 1275801979
Nurse Practitioner - Psychiatric/Mental Health in Olean, NY

Active since December 08, 2011PECOS EnrolledAccepts Medicare Assignment
237 DELAWARE AVE STE 14&15, OLEAN, NY 14760(716) 790-8847(716) 526-4161 Get Directions Write a Review

NPPES record last updated: May 15, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 15, 2024, Jan 29, 2016 (2 updates tracked since 2016).

About Prof. Rebekah Mara Williams Pmhnp-bc NPPES

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

PROF. REBEKAH MARA WILLIAMS PMHNP-BC (NPI 1275801979) is an individual psychiatric/mental health provider in Olean, New York, licensed in New York (F401628-1) and active in the NPI registry since December 2011. She is enrolled in Medicare PECOS and is a graduate of Other (2013).

NPPES Registry Identity

NPI1275801979
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NamePROF. REBEKAH MARA WILLIAMSCredential: PMHNP-BC
Location Address237 DELAWARE AVE STE 14&15Olean, NY 14760-2601
Mailing Address1465 Foote Avenue ExtJamestown, NY 14701-9383 · (716) 526-4041
Phone(716) 790-8847
Fax(716) 526-4161
Sole ProprietorNo
Medical School CMSOtherGraduated 2013
Enumeration DateDecember 8, 2011
Last NPPES UpdateMay 15, 20242 updates tracked since enumeration
NPPES CertifiedMay 15, 2024
✔ NPI 1275801979 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in NY · F401628-1
Also ListedRegistered Nurse · Psychiatric/Mental HealthTaxonomy 163WP0808X · License 22 605850 (NY)
Also ListedClinical Nurse Specialist · Psychiatric/Mental Health, AdultTaxonomy 364SP0809X · License 1275801979 (NY)
237 DELAWARE AVE STE 14&15, Olean, NY 14760
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Other Names 1

Former Name (1)Rebekah Mara Brownstein

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

Prof. Rebekah Mara Williams Pmhnp-bc 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 ID42534950
PECOS Enrollment IDI20150126000848
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

3

Medicare enrollment records show Rebekah Williams reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

County Of Cattaraugus
0.2 mi
Mental Health (Including Community Mental Health Center)
1 LEO MOSS DR, SUITE 4308
Olean, NY 14760
  • Reassigned Medicare billing, New York enrollment
  • 18 clinicians in this Medicare group
NPI 1659414696 (716) 373-8040
Olean General Hospital
0.4 mi
General Practice
500 MAIN ST
Olean, NY 14760
  • Reassigned Medicare billing, New York and Pennsylvania enrollments
  • 163 clinicians in this Medicare group
NPI 1033499017 (716) 375-6993
Jamestown Psychiatric PC
41 mi
Child & Adolescent Psychiatry
1465 FOOTE AVENUE EXT
Jamestown, NY 14701
  • Reassigned Medicare billing, New York enrollment
  • 18 clinicians in this Medicare group
NPI 1700062247 (716) 526-4041

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 3

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.
194 services26 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.
30 services22 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.
27 services21 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 14760 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.

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 Rebekah Williams's NPI number?

The NPI number for Rebekah Williams is 1275801979. It was assigned to this individual provider in the NPPES registry on December 8, 2011. The provider is also known as Rebekah Mara Brownstein.

Where is Rebekah Williams located?

Rebekah Williams practices at 237 Delaware Ave Ste 14&15, Olean, NY 14760. The listed phone number is (716) 790-8847.

What is Rebekah Williams's specialty?

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

Is Rebekah Williams enrolled in Medicare?

Yes. Rebekah 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 organizations bill Medicare for Rebekah Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Rebekah Williams reassigns Medicare benefits to 3 organizations: County Of Cattaraugus (Olean, NY), Olean General Hospital (Olean, NY) and Jamestown Psychiatric PC (Jamestown, 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 Rebekah Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Rebekah Williams accept?

Health plans from Oscar Health list Rebekah 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.

When was this NPI record last updated?

The NPPES record for Rebekah Williams was last updated on May 15, 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.