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RUBEN DIAZ AGNP-BC, FNP-BC
NPI 1073941225
Nurse Practitioner - Adult Health in New York, NY

Active since October 25, 2013PECOS EnrolledAccepts Medicare Assignment
100/100
CMS Quality Rating
1275 YORK AVE FL 3, NEW YORK, NY 10065(212) 639-2000 Get Directions Write a Review

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

About Ruben Diaz Agnp-bc, Fnp-bc NPPES

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

RUBEN DIAZ AGNP-BC, FNP-BC (NPI 1073941225) is an individual adult health provider in New York, New York, licensed in New York (F306708-1) and active in the NPI registry since October 2013. He is enrolled in Medicare PECOS, is affiliated with Northern Westchester Hospital, and is a graduate of Other (2013).

NPPES Registry Identity

NPI1073941225
Entity TypeIndividualMale
Primary Taxonomy363LA2200X
Provider Legal NameRUBEN DIAZCredential: AGNP-BC, FNP-BC
Location Address1275 YORK AVE FL 3New York, NY 10065-6007
Mailing Address633 3rd Ave Fl 4New York, NY 10017-6943 · (212) 639-2000
Phone(212) 639-2000
Sole ProprietorNo
Medical School CMSOtherGraduated 2013
Enumeration DateOctober 25, 2013
Last NPPES UpdateFebruary 18, 2026
NPPES CertifiedFebruary 18, 2026
✔ NPI 1073941225 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Adult HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LA2200X
License✔ Licensed in NY · F306708-1
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License F339816-01 (NY)
1275 YORK AVE FL 3, New York, NY 10065
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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 and accepts Medicare assignment

Ruben Diaz Agnp-bc, Fnp-bc 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.

PECOS PAC ID1658690441
PECOS Enrollment IDI20150429000351
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 Reassignments

3

Medicare enrollment records show Ruben Diaz reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Memorial Endocrine Group
Same address
Endocrinology, Diabetes & Metabolism
1275 YORK AVE
New York, NY 10065
  • Reassigned Medicare billing, New York enrollment
  • 19 clinicians in this Medicare group
NPI 1558332023 (646) 227-3813
New York Society For Releif Of The Ruptured And Crippled Maintaining
0.1 mi
Special Hospital
535 E 70TH ST
New York, NY 10021
  • Reassigned Medicare billing, New York enrollment
  • Medicare enrollment name: New York Society For The Relief Of Ruptured & Crippled Maintaining
  • 121 clinicians in this Medicare group
NPI 1477988707 (212) 774-7598
North Shore - Lij Medical PC
13 mi
Internal Medicine
270-05 76TH AVE
New Hyde Park, NY 11040
  • Reassigned Medicare billing, New York enrollment
  • 9,353 clinicians in this Medicare group
NPI 1790043479 (516) 465-8089

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 6

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
246 services96 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
130 services62 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
74 services42 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
27 services27 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
19 services12 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
15 services15 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northern Westchester Hospital

Acute Care Hospitals · Mount Kisco, NY
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330162
Location400 East Main StreetMount Kisco, NY 10549 · Westchester County
Emergency services Birthing friendly

Phelps Hospital

Acute Care Hospitals · Sleepy Hollow, NY
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330261
Location701 N BroadwaySleepy Hollow, NY 10591 · Westchester County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10065 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$102.04 typical visit price
range $65.69 – $198.19
Typical copayment $25.51 (range $16.42 – $49.54)
Most-billed visit code 99203
Established Patient
$114.88 typical visit price
range $21.20 – $160.66
Typical copayment $28.72 (range $5.30 – $40.16)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality91.8
Improvement Activities40

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
10 suppliers16 claims23 services$6.57 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
2 suppliers18 claims18 services$184.66 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Ruben Diaz's NPI number?

The NPI number for Ruben Diaz is 1073941225. It was assigned to this individual provider in the NPPES registry on October 25, 2013.

Where is Ruben Diaz located?

Ruben Diaz practices at 1275 York Ave Fl 3, New York, NY 10065. The listed phone number is (212) 639-2000.

What is Ruben Diaz's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.

Is Ruben Diaz enrolled in Medicare?

Yes. Ruben Diaz 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 Ruben Diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ruben Diaz reassigns Medicare benefits to 3 organizations: Memorial Endocrine Group (New York, NY), New York Society For Releif Of The Ruptured And Crippled Maintaining (New York, NY) and North Shore - Lij Medical PC (New Hyde Park, 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 Ruben Diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Ruben Diaz affiliated with any hospitals?

According to CMS data, Ruben Diaz is affiliated with Northern Westchester Hospital and Phelps Hospital.

When was this NPI record last updated?

The NPPES record for Ruben Diaz was last updated on February 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.