Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Internal Medicine

Alexis Oliveros, MD

Works at hospitals in Cortlandt Manor, NY · Sleepy Hollow, NY · New York

Summary

Dr. Alexis Oliveros, MD is an internal medicine doctor at 35 S Riverside Ave, Croton On Hudson, NY 10520. Phone: (914) 233-3305. Accepts Medicare assignment. In 2024, Alexis Oliveros had 360 Original Medicare patients and 1,943 services. NPI 1538302310. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 35 S Riverside Ave, Croton On Hudson, NY 10520 · Directions
  • Phone: (914) 233‑3305
  • Medicare: Accepts Medicare assignment
  • Hospitals: Hudson Valley Hospital Center, Phelps Hospital
  • Group practice: The Westchester Medical Practice PC
  • Medical school: graduated 2009 (17 years since medical school)
  • Gender (as listed): Female
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Alexis Oliveros, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Alexis Oliveros accept Medicare assignment?
Yes. Medicare's clinician data says Alexis Oliveros accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Alexis Oliveros see?
In 2024, CMS data shows 360 Original Medicare patients and 1,943 services for Alexis Oliveros. This counts Original Medicare only and measures volume, not quality.
What is Alexis Oliveros's NPI number?
1538302310. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Alexis Oliveros, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients360
Services billed to Medicare1,943
Different services or procedures34
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)489 services
  2. Insertion of needle into vein for collection of blood sample (36415)430 services
  3. Urinalysis, manual test (81002)247 services
  4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)246 services
  5. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)209 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol75%
  • High blood pressure64%
  • Arthritis36%
  • Diabetes23%
  • Anxiety21%
  • Osteoporosis19%

Hospitals where Alexis Oliveros works

Medicare's Facility Affiliation Data lists Alexis Oliveros at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • Hudson Valley Hospital CenterCortlandt Manor, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330267
  • Phelps HospitalSleepy Hollow, NY · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 330261

Practice locations

Addresses where Alexis Oliveros is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Alexis Oliveros as a member of this group (CMS data updated October 2, 2026).

  • The Westchester Medical Practice PC196 clinicians in the group

Specialties

Find other Internal Medicine doctors in New York →

Other internal medicine doctors in Croton On Hudson

Clinicians with the same Medicare primary specialty in Croton On Hudson, NY — not a recommendation.

All internal medicine doctors in Croton On Hudson →

Other clinicians in The Westchester Medical Practice PC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Graduation year2009 (17 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1538302310
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians