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MR. ALEXANDER RYAN WALKER M.D.
NPI 1386209831
Student in an Organized Health Care Education/Training Program in Syracuse, NY

Active since May 09, 2019PECOS Enrolled
750 E ADAMS ST DEPT OF, SYRACUSE, NY 13210(315) 464-3835(315) 464-3882 Get Directions Write a Review

NPPES record last updated: May 11, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 11, 2023, Aug 21, 2019, May 9, 2019 (3 updates tracked since 2019).

About Mr. Alexander Ryan Walker M.d. NPPES

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

MR. ALEXANDER RYAN WALKER M.D. (NPI 1386209831) is an individual student in an organized health care education/training program in Syracuse, New York and active in the NPI registry since May 2019. He is enrolled in Medicare PECOS and is a graduate of Other (2019).

NPPES Registry Identity

NPI1386209831
Entity TypeIndividualMale
Primary Taxonomy390200000X
Provider Legal NameMR. ALEXANDER RYAN WALKERCredential: M.D.
Location Address750 E ADAMS ST DEPT OFSyracuse, NY 13210-2306
Mailing Address750 E Adams St Dept OfSyracuse, NY 13210-1834 · (315) 464-3835 · Fax (315) 464-3882
Phone(315) 464-3835
Fax(315) 464-3882
Sole ProprietorNo
Medical School CMSOtherGraduated 2019
Enumeration DateMay 9, 2019
Last NPPES UpdateMay 11, 20233 updates tracked since enumeration
NPPES CertifiedMay 11, 2023
✔ NPI 1386209831 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyStudent in an Organized Health Care Education/Training ProgramStudent, Health Care
Taxonomy Code390200000X
Definition
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Also ListedInternal MedicineTaxonomy 207R00000X · License 281209 (MA)
750 E ADAMS ST DEPT OF, Syracuse, NY 13210
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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 (PECOS)

Mr. Alexander Ryan Walker M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3577960574
PECOS Enrollment IDI20260611002160
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 Walker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

St Marys Healthcare
98 mi
General Acute Care Hospital
427 GUY PARK AVE, ST MARYS HEALTHCARE PRIMARY CARE DEPT
Amsterdam, NY 12010
  • Reassigned Medicare billing, New York enrollment
  • Medicare enrollment name: St. Mary's Healthcare
  • 144 clinicians in this Medicare group
NPI 1518926401 (518) 841-7407

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

Other Providers at the Same Location NPPES 6

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

DR. NIVEDITA SURESH MD
Student in an Organized Health Care Education/Training Program
750 E ADAMS ST DEPT OF
SYRACUSE, NY 13210
Onondaga County (315) 464-7120
SAMEETA KUMARI
Student in an Organized Health Care Education/Training Program
750 E ADAMS ST DEPT OF
SYRACUSE, NY 13210
Onondaga County (315) 464-5450
DR. SHAIFALI SANDAL MD
Student in an Organized Health Care Education/Training Program
750 E ADAMS ST DEPT OF
SYRACUSE, NY 13210
Onondaga County (315) 464-4506
DR. CHAITANYA SRAVANTHI CHANDRAVANKA M.D
Hospitalist
750 E ADAMS ST DEPT OF
SYRACUSE, NY 13210
Onondaga County (315) 464-5774
DAVID LUBIN M.D./PH.D.
Radiology (Nuclear Radiology)
750 E ADAMS ST DEPT OF
SYRACUSE, NY 13210
Onondaga County (315) 464-7494
ALKA GUPTA MD
Radiology (Neuroradiology)
750 E ADAMS ST DEPT OF
SYRACUSE, NY 13210
Onondaga County (315) 464-5189

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 Walker's NPI number?

The NPI number for Alexander Walker is 1386209831. It was assigned to this individual provider in the NPPES registry on May 9, 2019.

Where is Alexander Walker located?

Alexander Walker practices at 750 E Adams St Dept Of, Syracuse, NY 13210. The listed phone number is (315) 464-3835.

What is Alexander Walker's specialty?

The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.

Is Alexander Walker enrolled in Medicare?

Yes. Alexander Walker is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alexander Walker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Walker reassigns Medicare benefits to St Marys Healthcare (Amsterdam, 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 Alexander Walker'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 Walker was last updated on May 11, 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.