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ANTHONY WILLIAM DIAZ
NPI 1235645821
Internal Medicine in Perth Amboy, NJ

Active since December 19, 2017PECOS EnrolledAccepts Medicare Assignment
530 NEW BRUNSWICK AVE, PERTH AMBOY, NJ 08861(732) 324-5080(732) 324-4669 Get Directions Write a Review

NPPES record last updated: June 7, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 7, 2022, Dec 19, 2017 (2 updates tracked since 2017).

About Anthony William Diaz NPPES

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

ANTHONY WILLIAM DIAZ (NPI 1235645821) is an individual internal medicine provider in Perth Amboy, New Jersey, licensed in New Jersey (25MA11029900) and active in the NPI registry since December 2017. He is enrolled in Medicare PECOS, is affiliated with Ocean Medical Center, and is a graduate of Other (2016).

NPPES Registry Identity

NPI1235645821
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameANTHONY WILLIAM DIAZ
Location Address530 NEW BRUNSWICK AVEPerth Amboy, NJ 08861-3654
Mailing Address530 New Brunswick AvePerth Amboy, NJ 08861-3654 · (732) 324-5080 · Fax (732) 324-4669
Phone(732) 324-5080
Fax(732) 324-4669
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateDecember 19, 2017
Last NPPES UpdateJune 7, 20222 updates tracked since enumeration
NPPES CertifiedJune 1, 2022
✔ NPI 1235645821 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in NJ · 25MA11029900
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
530 NEW BRUNSWICK AVE, Perth Amboy, NJ 08861
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Cigna Healthcare.Insurance ›

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

Anthony William Diaz 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 ID8729489588
PECOS Enrollment IDI20210630002275, I20260115001367
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 Anthony Diaz reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Hospitalist Physicians Of New Jersey PA
4.4 mi
Hospitalist
65 JAMES ST
Edison, NJ 08820
  • Reassigned Medicare billing, New Jersey enrollment
  • 351 clinicians in this Medicare group
NPI 1588021851 (732) 321-7000
Plover Inpatient Services LLC
20 mi
Emergency Medicine
1 BAY AVE
Montclair, NJ 07042
  • Reassigned Medicare billing, New Jersey enrollment
  • 252 clinicians in this Medicare group
NPI 1134534688 (954) 939-5000
Novant Medical Group Inc
374 mi
Internal Medicine
100 HOSPITAL DR
Louisburg, NC 27549
  • Reassigned Medicare billing, North Carolina enrollment
  • Medicare enrollment name: Novant Health Medical Group, LLC
  • 2,998 clinicians in this Medicare group
NPI 1942522008 (919) 497-8048

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 4

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.

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.
620 services580 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
110 services100 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.
25 services20 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.
23 services23 patients

Hospital Affiliations CMS Care Compare 2

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

Ocean Medical Center

Acute Care Hospitals · Brick, NJ
3/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number310052
Location425 Jack Martin BlvdBrick, NJ 08724 · Ocean County
Emergency services Birthing friendly

Novant Health Rowan Medical Center

Acute Care Hospitals · Salisbury, NC
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number340015
Location612 Mocksville AveSalisbury, NC 28144 · Rowan County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 08861 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
$144.86 typical visit price
range $63.84 – $190.92
Typical copayment $36.21 (range $15.96 – $47.73)
Most-billed visit code 99204
Established Patient
$111.57 typical visit price
range $20.97 – $155.92
Typical copayment $27.89 (range $5.24 – $38.98)
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.

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. PARUL PRAVINCHANDRA LAKHLANI M.D.
Anesthesiology
530 NEW BRUNSWICK AVE, DIVISION OF ANESTHESIOLOGY, RARITAN BAY MEDICAL CENTER
PERTH AMBOY, NJ 08861
Middlesex County (732) 442-3700
CARDIOLOGY PROFESSIONAL SERVICES AT RARITAN BAY INC
Internal Medicine (Cardiovascular Disease)
530 NEW BRUNSWICK AVE
PERTH AMBOY, NJ 08861
Middlesex County (732) 324-5167
MS. LORRAINE LILLIAN SAUNDERS PA-C
Physician Assistant
530 NEW BRUNSWICK AVE
PERTH AMBOY, NJ 08861
Middlesex County (732) 324-5104
DR. MAHESH H BHAGAT MD
Internal Medicine
530 NEW BRUNSWICK AVE
PERTH AMBOY, NJ 08861
Middlesex County (732) 442-3700
RESHMA ATUL SAKARIA PA
Physician Assistant
530 NEW BRUNSWICK AVE
PERTH AMBOY, NJ 08861
Middlesex County (732) 324-5075
DR. LESLIE POOSER OSEI-TUTU MD
Anesthesiology
530 NEW BRUNSWICK AVE
PERTH AMBOY, NJ 08861
Middlesex County (732) 324-5075
ASFANDYAR IBRAR MD
Student in an Organized Health Care Education/Training Program
530 NEW BRUNSWICK AVE
PERTH AMBOY, NJ 08861
Middlesex County (732) 324-5080
MICHELLE ABRAMOVA DO
Student in an Organized Health Care Education/Training Program
530 NEW BRUNSWICK AVE
PERTH AMBOY, NJ 08861
Middlesex County (732) 442-3700

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 Anthony Diaz's NPI number?

The NPI number for Anthony Diaz is 1235645821. It was assigned to this individual provider in the NPPES registry on December 19, 2017.

Where is Anthony Diaz located?

Anthony Diaz practices at 530 New Brunswick Ave, Perth Amboy, NJ 08861. The listed phone number is (732) 324-5080.

What is Anthony Diaz's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Anthony Diaz enrolled in Medicare?

Yes. Anthony 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 Anthony Diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Anthony Diaz reassigns Medicare benefits to 3 organizations: Hospitalist Physicians Of New Jersey PA (Edison, NJ), Plover Inpatient Services LLC (Montclair, NJ) and Novant Medical Group Inc (Louisburg, NC). 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 Anthony Diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Anthony Diaz accept?

Health plans from Cigna Healthcare list Anthony Diaz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Anthony Diaz affiliated with any hospitals?

According to CMS data, Anthony Diaz is affiliated with Ocean Medical Center and Novant Health Rowan Medical Center.

When was this NPI record last updated?

The NPPES record for Anthony Diaz was last updated on June 7, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.