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DR. WILLIAM BRENT ALEXANDER JR. MD, PHD
NPI 1114585379
Internal Medicine - Hospice and Palliative Medicine in Buffalo, NY

Active since June 03, 2019PECOS EnrolledAccepts Medicare Assignment
ELM AND CARLTON ST, BUFFALO, NY 14263(716) 845-2300 Get Directions Write a Review

NPPES record last updated: August 7, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Aug 7, 2023, Jun 3, 2019 (2 updates tracked since 2019).

About Dr. William Brent Alexander Jr. Md, Phd NPPES

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

DR. WILLIAM BRENT ALEXANDER JR. MD, PHD (NPI 1114585379) is an individual hospice and palliative medicine provider in Buffalo, New York, licensed in New York (320519) and active in the NPI registry since June 2019. He is enrolled in Medicare PECOS and is a graduate of Other (2019).

NPPES Registry Identity

NPI1114585379
Entity TypeIndividualMale
Primary Taxonomy207RH0002X
Provider Legal NameDR. WILLIAM BRENT ALEXANDER JR.Credential: MD, PHD
Location AddressELM AND CARLTON STBuffalo, NY 14263-0001
Mailing AddressElm And Carlton StBuffalo, NY 14263-0001 · (716) 845-2300
Phone(716) 845-2300
Sole ProprietorNo
Medical School CMSOtherGraduated 2019
Enumeration DateJune 3, 2019
Last NPPES UpdateAugust 7, 20232 updates tracked since enumeration
NPPES CertifiedMay 23, 2023
✔ NPI 1114585379 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hospice and Palliative MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RH0002X
License✔ Licensed in NY · 320519
Definition
An internal medicine physician with special knowledge and skills to prevent and relieve the suffering experienced by patients with life-limiting illnesses. This specialist works with an interdisciplinary hospice or palliative care team to maximize quality of life while addressing physical, psychological, social and spiritual needs of both patient and family throughout the course of the disease, through the dying process, and beyond for the family. This specialist has expertise in the assessment of patients with advanced disease; the relief of distressing symptoms; the coordination of interdisciplinary patient and family-centered care in diverse venues; the use of specialized care systems including hospice; the management of the imminently dying patient; and legal and ethical decision making in end-of-life care.
ELM AND CARLTON ST, Buffalo, NY 14263
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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 and accepts Medicare assignment

Dr. William Brent Alexander Jr. Md, Phd 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 ID7618204868
PECOS Enrollment IDI20230804000307
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 William Alexander reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Roswell Park Cancer Institute
9.1 mi
Multi-Specialty
ELM AND CARLTON ST
Buffalo, NY 14263
  • Reassigned Medicare billing, New York enrollment
  • 602 clinicians in this Medicare group
NPI 1720036593 (716) 845-2300

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.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
27 services17 patients
Advance care planning, first 30 minutes 99497
Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.
15 services15 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
14 services14 patients

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.

MICHELLE DOYLE MCCARTHY PA
Physician Assistant
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-2300
DR. OMAR Y MIRZA DMD
Dentist
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-1067
EMILY KIRCHNER
Family Medicine
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (717) 845-2300
STEPHANIE ERIN MYSZKA F.N.P.- BC
Nurse Practitioner (Family)
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-2300
ALEXANDRA VAZQUEZ AGACNP
Nurse Practitioner (Acute Care)
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-2300
DR. DENISE MARIE JOHNSON PHARMD
Pharmacist
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-8584
DR. CALEB NATHANIEL SEAVEY MD PHD
Surgery (Surgical Oncology)
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-2300
MICHAEL S WINNICKI MD
Internal Medicine
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-2300

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 William Alexander's NPI number?

The NPI number for William Alexander is 1114585379. It was assigned to this individual provider in the NPPES registry on June 3, 2019.

Where is William Alexander located?

William Alexander practices at Elm And Carlton St, Buffalo, NY 14263. The listed phone number is (716) 845-2300.

What is William Alexander's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hospice and Palliative Medicine, with taxonomy code 207RH0002X.

Is William Alexander enrolled in Medicare?

Yes. William Alexander 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 William Alexander's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Alexander reassigns Medicare benefits to Roswell Park Cancer Institute (Buffalo, 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 William Alexander'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 William Alexander was last updated on August 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.