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ALEXANDER CHRISTOPHER TAY NP
NPI 1164245494
Nurse Practitioner in Washington, DC

Active since November 05, 2024PECOS EnrolledAccepts Medicare Assignment
3800 RESERVOIR RD NW, WASHINGTON, DC 20007(202) 444-3967(202) 444-5104 Get Directions Write a Review

NPPES record last updated: November 5, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Alexander Christopher Tay Np NPPES

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

ALEXANDER CHRISTOPHER TAY NP (NPI 1164245494) is an individual nurse practitioner in Washington, District Of Columbia, licensed in District Of Columbia (NP500008297) and active in the NPI registry since November 2024. He is enrolled in Medicare PECOS, maintains a secondary practice location in Washington, and is a graduate of Other (2024).

NPPES Registry Identity

NPI1164245494
Entity TypeIndividualMale
Primary Taxonomy363L00000X
Provider Legal NameALEXANDER CHRISTOPHER TAYCredential: NP
Location Address3800 RESERVOIR RD NWWashington, DC 20007-2113
Mailing Address3800 Reservoir Rd NwWashington, DC 20007-2113 · (202) 444-3967 · Fax (202) 444-5104
Phone(202) 444-3967
Fax(202) 444-5104
Sole ProprietorNo
Medical School CMSOtherGraduated 2024
Enumeration DateNovember 5, 2024
NPPES CertifiedNovember 5, 2024
✔ NPI 1164245494 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in DC · NP500008297
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
3800 RESERVOIR RD NW, Washington, DC 20007
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Secondary Practice Location 1

Location 1110 Irving St NWWashington, DC 20010-3017 · Phone (202) 877-7000

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

Alexander Christopher Tay 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.

PECOS PAC ID7911437173
PECOS Enrollment IDI20250204001511
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 Alexander Tay reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Medstar Medical Group II LLC
Same address
Critical Care Medicine
3800 RESERVOIR RD NW
Washington, DC 20007
  • Reassigned Medicare billing, District of Columbia enrollment
  • 3,530 clinicians in this Medicare group
NPI 1205562816 (703) 558-1403

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 20007 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
$100.31 typical visit price
range $65.18 – $194.86
Typical copayment $25.07 (range $16.29 – $48.71)
Most-billed visit code 99203
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
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 20

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

DR. KAUSTUBH SUBHASH YADWADKAR M.D.
Radiology (Diagnostic Radiology)
3800 RESERVOIR RD NW, CG201
WASHINGTON, DC 20007
District of Columbia (304) 206-7595
FRED MO MD
Orthopaedic Surgery (Orthopaedic Surgery of the Spine)
3800 RESERVOIR RD NW
WASHINGTON, DC 20007
District of Columbia (202) 444-8766
SEBLE YIRGA
Nurse Practitioner (Family)
3800 RESERVOIR RD NW
WASHINGTON, DC 20007
District of Columbia (202) 444-7265
ARLETTE THOMPSON-PILE
Physical Therapy Assistant
3800 RESERVOIR RD NW, PHYSICAL MEDICINE AND REHBAILITATION DEPARTMENT
WASHINGTON, DC 20007
District of Columbia (202) 444-3689
JENNA ELIZABETH HOROWITZ
Physician Assistant (Surgical)
3800 RESERVOIR RD NW, NEUROSURGERY DEPARTMENT
WASHINGTON, DC 20007
District of Columbia (202) 444-2000
HALEY SWANSON FOSTER M.D.
Radiology (Vascular & Interventional Radiology)
3800 RESERVOIR RD NW
WASHINGTON, DC 20007
District of Columbia (202) 444-5022
CLAIRE DALBY MD
Student in an Organized Health Care Education/Training Program
3800 RESERVOIR RD NW
WASHINGTON, DC 20007
District of Columbia (202) 444-7106
MS. AMANDA JORDAN SUN PA-C
Physician Assistant
3800 RESERVOIR RD NW
WASHINGTON, DC 20007
District of Columbia (877) 772-6505

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 Alexander Tay's NPI number?

The NPI number for Alexander Tay is 1164245494. It was assigned to this individual provider in the NPPES registry on November 5, 2024.

Where is Alexander Tay located?

Alexander Tay practices at 3800 Reservoir Rd NW, Washington, DC 20007. The listed phone number is (202) 444-3967.

What is Alexander Tay's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Alexander Tay enrolled in Medicare?

Yes. Alexander Tay 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 Alexander Tay's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Tay reassigns Medicare benefits to Medstar Medical Group II LLC (Washington, DC). 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 Alexander Tay'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 Alexander Tay was last updated on November 5, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.