Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JOSE VALENTIN DIAZ D.O.
NPI 1740564533
Surgery - Surgical Critical Care in West Islip, NY

Q: What is Jose Diaz's NPI number?

The NPI number for Jose Diaz is 1740564533. It was assigned to this individual provider in the NPPES registry on September 28, 2011.

Q: What is Jose Diaz's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Surgical Critical Care, with taxonomy code 2086S0102X.

Q: When was this NPI record last updated?

The NPPES record for Jose Diaz was last updated on October 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 days 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.

Active since September 28, 2011PECOS Enrolled

1000 MONTAUK HWY, WEST ISLIP, NY 11795(631) 465-6343 Get Directions Write a Review

NPPES record last updated: October 23, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Jose Valentin Diaz D.o. NPPES

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

DR. JOSE VALENTIN DIAZ D.O. (NPI 1740564533) is an individual surgical critical care provider in West Islip, New York, licensed in New York (294195) and active in the NPI registry since September 2011. He is enrolled in Medicare PECOS, is affiliated with Long Island Community Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1740564533

Entity TypeIndividualMale

Primary Taxonomy2086S0102X

Provider Legal NameDR. JOSE VALENTIN DIAZCredential: D.O.

Location Address1000 MONTAUK HWYWest Islip, NY 11795

Mailing Address12204 150th AveSouth Ozone Park, NY 11420-4113 · (718) 791-5373

Phone(631) 465-6343

Sole ProprietorNo

Medical School CMSOtherGraduated 2011

Enumeration DateSeptember 28, 2011

Last NPPES UpdateOctober 23, 2026

NPPES CertifiedOctober 23, 2026

✔ NPI 1740564533 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySurgery · Surgical Critical CareAllopathic & Osteopathic Physicians

Taxonomy Code2086S0102X

License✔ Licensed in NY · 294195

Definition

A surgeon with expertise in the management of the critically ill and postoperative patient, particularly the trauma victim, who specializes in critical care medicine diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.

Also ListedSurgeryTaxonomy 208600000X · License LT18018 (ME), 294195 (NY)

1000 MONTAUK HWY, West Islip, NY 11795

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Secondary Practice Locations 2

Location 11300 Roanoke AveRiverhead, NY 11901-2031 · Phone (631) 548-6446

Location 2163 Van Buren RdCaribou, ME 04736-3567 · Phone (207) 493-3500

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. Jose Valentin Diaz D.o. 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 ID7113277427

PECOS Enrollment IDI20180907001019

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

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

Samaritan Emergency Medical Services, PC

Same address

Emergency Medicine

1000 MONTAUK HWY
West Islip, NY 11795

Reassigned Medicare billing, New York enrollment
91 clinicians in this Medicare group

NPI 1104978014 (631) 376-3000

Chs Physician Partners, PC

8.8 mi

Cardiovascular Disease

206 FALLWOOD PKWY
Farmingdale, NY 11735

Reassigned Medicare billing, New York enrollment
944 clinicians in this Medicare group

NPI 1750626974 (516) 249-1020

New York University

1,049 mi

Cardiovascular Disease

3301 QUANTUM BLVD
Boynton Beach, FL 33426

Reassigned Medicare billing, New York enrollment
2,450 clinicians in this Medicare group

NPI 1285826438 (877) 648-2964

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.

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.

549 services275 patients

Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221

Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.

64 services64 patients

Hospital discharge day management, 30 minutes or less 99238

Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.

33 services33 patients

Emergency department visit with low level of medical decision making 99283

An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.

24 services24 patients

Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional 99211

This service involves an outpatient visit for established patients who may not need direct interaction with a healthcare professional. It could include reviewing test results, monitoring existing conditions, or adjusting treatment plans. It's typically done remotely, ensuring your comfort and convenience.

21 services16 patients

Emergency department visit with straightforward medical decision making 99282

An emergency department visit for a mild to moderate issue is when you seek immediate medical attention for a non-life-threatening condition. This could include minor injuries, moderate pain, or illnesses like the flu. During the visit, healthcare professionals assess your condition, provide treatment, and may recommend follow-up care.

11 services11 patients

Hospital Affiliations CMS Care Compare 3

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

Long Island Community Hospital

Acute Care Hospitals · Patchogue, NY

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330141

Location101 Hospital RoadPatchogue, NY 11772 · Suffolk County

Emergency services

Good Samaritan Hospital Medical Center

Acute Care Hospitals · West Islip, NY

1/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number330286

Location1000 Montauk HighwayWest Islip, NY 11795 · Suffolk County

Emergency services Birthing friendly

Chsli St Joseph Hospital

Acute Care Hospitals · Bethpage, NY

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330332

Location4295 Hempstead TurnpikeBethpage, NY 11714 · Nassau County

Emergency services

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.

DR. ANTHONY NGUYEN MD

Obstetrics & Gynecology

1000 MONTAUK HWY
WEST ISLIP, NY 11795

Suffolk County (631) 376-4163

LAUREN MARIE CHOBAN DO

Emergency Medicine

1000 MONTAUK HWY
WEST ISLIP, NY 11795

Suffolk County (631) 376-3000

MISS MUNMUN AZIZ MD

Student in an Organized Health Care Education/Training Program

1000 MONTAUK HWY
WEST ISLIP, NY 11795

Suffolk County (929) 340-5665

TERENCE JAMES OMALLEY MD

Anesthesiology

1000 MONTAUK HWY, GOOD SAMARITAN HOSPITAL MEDICAL CENTER
WEST ISLIP, NY 11795

Suffolk County (631) 376-4088

PIOTR PAPUZINSKI MD

Internal Medicine

1000 MONTAUK HWY
WEST ISLIP, NY 11795

Suffolk County (631) 376-3000

LAURIE WATERS PA

Physician Assistant

1000 MONTAUK HWY
WEST ISLIP, NY 11795

Suffolk County (631) 376-3000

SHELLEY MATSON RN

Registered Nurse

1000 MONTAUK HWY
WEST ISLIP, NY 11795

Suffolk County (631) 376-3000

RIDDA MANZOOR MD

Student in an Organized Health Care Education/Training Program

1000 MONTAUK HWY
WEST ISLIP, NY 11795

Suffolk County (631) 376-4163

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 Jose Diaz's NPI number?

The NPI number for Jose Diaz is 1740564533. It was assigned to this individual provider in the NPPES registry on September 28, 2011.

Where is Jose Diaz located?

Jose Diaz practices at 1000 Montauk Hwy, West Islip, NY 11795. The listed phone number is (631) 465-6343.

What is Jose Diaz's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Surgical Critical Care, with taxonomy code 2086S0102X.

Is Jose Diaz enrolled in Medicare?

Yes. Jose 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 Jose Diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jose Diaz reassigns Medicare benefits to 3 organizations: Samaritan Emergency Medical Services, PC (West Islip, NY), Chs Physician Partners, PC (Farmingdale, NY) and New York University (Boynton Beach, FL). 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 Jose Diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Jose Diaz affiliated with any hospitals?

According to CMS data, Jose Diaz is affiliated with Long Island Community Hospital, Good Samaritan Hospital Medical Center and Chsli St Joseph Hospital.

When was this NPI record last updated?

The NPPES record for Jose Diaz was last updated on October 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 days 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.