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Endocrinology

Alfonso A. Ortiz, MD

Sees patients in Bronx, NY · New York

Summary

Alfonso A. Ortiz, MD (Endocrinology) is enrolled with Medicare at 2 practice locations in Bronx, NY. NPI 1699915967. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

Call(646) 350‑1633 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Alfonso A. Ortiz, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

2Practice locations
EndocrinologyPrimary specialty
YesAccepts Medicare assignment
YesOffers telehealth
43Years since medical school (graduated 1983)
MaleGender (as listed)
Essen Medical Associates, PCGroup practice (+1 more)

Quick answers

Where does Alfonso A. Ortiz see patients?
Medicare's clinician data lists 2 practice locations, including Bronx, NY. Call before your visit to confirm the address.
What is Alfonso A. Ortiz's specialty?
Medicare lists Endocrinology as the primary specialty, and also Internal Medicine.
Does Alfonso A. Ortiz accept Medicare assignment?
Yes. Medicare's clinician data says Alfonso A. Ortiz accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
Does Alfonso A. Ortiz offer telehealth?
Medicare's clinician data says Alfonso A. Ortiz offers telehealth services. Ask the office which visits can be done by video or phone.
What is the phone number for Alfonso A. Ortiz?
(646) 350-1633, as listed in official Medicare / NPI Registry data.
What is Alfonso A. Ortiz's NPI number?
1699915967. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Alfonso A. Ortiz is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Alfonso A. Ortiz as a member of these groups (CMS data updated 2026-10-02).

  • Essen Medical Associates, PC266 clinicians in the group
  • Shakespeare Operating LLC151 clinicians in the group

Specialties

Find other Endocrinology doctors in New York →

Other endocrinologists in Bronx

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

All endocrinologists in Bronx →

Clinician information

CredentialMD
Graduation year1983
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1699915967
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. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians