DR. ALFONSO A ORTIZ MD
NPI 1699915967
Internal Medicine - Endocrinology, Diabetes & Metabolism in Las Vegas, NV
About Dr. Alfonso A Ortiz Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALFONSO A ORTIZ MD (NPI 1699915967) is an individual endocrinology, diabetes & metabolism provider in Las Vegas, Nevada, licensed in New York (170235) and active in the NPI registry since February 2009. He is enrolled in Medicare PECOS and is a graduate of Other (1983).
NPPES Registry Identity
Specialties & Licenses 2
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
Dr. Alfonso A Ortiz Md 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.
Medicare Billing Reassignments
5Medicare enrollment records show Alfonso Ortiz reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Bronx, NY 10452
- Reassigned Medicare billing, New York enrollment
- 272 clinicians in this Medicare group
Bronx, NY 10453
- Reassigned Medicare billing, New York enrollment
- 1,393 clinicians in this Medicare group
Bronx, NY 10458
- Reassigned Medicare billing, New York enrollment
- 74 clinicians in this Medicare group
Bronx, NY 10461
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Bronx Medical Practice PC
- 1,013 clinicians in this Medicare group
Bronx, NY 10461
- Reassigned Medicare billing, New York enrollment
- 1,054 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 89110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
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 Alfonso Ortiz's NPI number?
The NPI number for Alfonso Ortiz is 1699915967. It was assigned to this individual provider in the NPPES registry on February 26, 2009.
Where is Alfonso Ortiz located?
Alfonso Ortiz practices at 540 N Nellis Blvd, Las Vegas, NV 89110. The listed phone number is (702) 677-3609.
What is Alfonso Ortiz's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Alfonso Ortiz enrolled in Medicare?
Yes. Alfonso Ortiz 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 organizations bill Medicare for Alfonso Ortiz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alfonso Ortiz reassigns Medicare benefits to 5 organizations: Shakespeare Operating LLC (Bronx, NY), Essen Medical Associates, PC (Bronx, NY), Medalliance Medical Health Services Inc (Bronx, NY), Bronx Medical Practice P.C. (Bronx, NY) and House Call Medical Services Of New York, PLLC (Bronx, NY). Each 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 Alfonso Ortiz'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 Alfonso Ortiz was last updated on June 6, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Dr. Alfonso A Ortiz, MD · NPI 1699915967
Endocrinology, Diabetes & Metabolism physician in Las Vegas, Nevada. Individual provider, active in the CMS NPPES registry since February 26, 2009.
## Identity
- **NPI:** 1699915967 (Entity type: Individual)
- **Enumerated:** February 26, 2009
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** 170235 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 540 N NELLIS BLVD, Las Vegas, NV 89110
- **Phone:** (702) 677-3609 · **Fax:** (702) 431-0265
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Shakespeare Operating LLC (NPI 1720634538, Bronx, NY); Essen Medical Associates, PC (NPI 1366418709, Bronx, NY); Medalliance Medical Health Services Inc (NPI 1558356741, Bronx, NY); Bronx Medical Practice P.C. (NPI 1356726087, Bronx, NY); House Call Medical Services Of New York, PLLC (NPI 1851345946, Bronx, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1983
## Record status
- **NPPES last updated:** June 6, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1699915967) · Data from the CMS NPPES public registry.