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Internal Medicine

Manuel Montes De Oca, MD

Works at hospitals in Maryville, IL · Valhalla, NY · Illinois, New York

Summary

Dr. Manuel Montes De Oca, MD is an internal medicine doctor at 100 Woods Rd, Valhalla, NY 10595. Phone: (914) 493-7000. Accepts Medicare assignment. NPI 1548732738. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 100 Woods Rd, Valhalla, NY 10595 · Directions (2 more locations)
  • Phone: (914) 493‑7000
  • Medicare: Accepts Medicare assignment
  • Hospitals: Anderson Hospital, Westchester Medical Center
  • Group practice: Westchester Medical Center Advanced Physician Services PC (+1 more)
  • Medical school: graduated 2017 (9 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Manuel Montes De Oca, 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 Manuel Montes De Oca accept Medicare assignment?
Yes. Medicare's clinician data says Manuel Montes De Oca 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.
What is Manuel Montes De Oca's NPI number?
1548732738. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Manuel Montes De Oca works

Medicare's Facility Affiliation Data lists Manuel Montes De Oca 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.

  • Anderson HospitalMaryville, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140289
  • Westchester Medical CenterValhalla, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330234

Practice locations

Addresses where Manuel Montes De Oca is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Manuel Montes De Oca as a member of these groups (CMS data updated October 2, 2026).

  • Westchester Medical Center Advanced Physician Services PC897 clinicians in the group
  • Midwest Inpatient Anderson Health Inc46 clinicians in the group

Specialties

Find other Internal Medicine doctors in New York →

Other internal medicine doctors in Valhalla

Clinicians with the same Medicare primary specialty in Valhalla, NY — not a recommendation.

All internal medicine doctors in Valhalla →

Other clinicians in Westchester Medical Center Advanced Physician Services PC

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

Clinician information

CredentialMD
Graduation year2017 (9 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1548732738
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. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  5. Medicare Care Compare — official Medicare tool to look up clinicians