Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ms. Ruth G Diaz, MD

Q: What is the NPI number for Ruth Diaz?

The National Provider Identifier (NPI) for Ruth Diaz is 1235119066, a Type 1 (individual) record in the CMS NPPES registry.

Internal Medicine Physician in Hauppauge, NY · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1235119066

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Registry record

Entity type Individual (Type 1)

Name Ms. Ruth G Diaz

Credential MD

Sex Female

Practice address Hauppauge, NY, 11788

Phone (631) 224-1819

Fax (631) 224-1812

Enumeration date Jan 18, 2006

Last updated in NPPES Feb 25, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 116667 (NY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
2188984	Other	-	CIGNA
10438	Other	-	VYTRA
OH283P	Other	-	HIP
00847970	Medicaid	NY	-
040426010368	Other	-	FIDELIS CARE OF NY
26047	Other	-	AETNA
582902	Other	-	EMPIRE BLUE CROSS BLUE SH
1309464	Other	-	FIRST HEALTH

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Ruth Diaz?

The National Provider Identifier (NPI) for Ruth Diaz is 1235119066, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ruth Diaz practice?

The practice location on file with NPPES is in Hauppauge, NY. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Shahram Hormozi Interventional Cardiology Physician · Hauppauge, NY NPI 1215916721 Leigh Hutchinson Specialist · Hauppauge, NY NPI 1568497204 Roberta Bianco Family Medicine Physician · Hauppauge, NY NPI 1356435846 Elliot Forman Chiropractor · Hauppauge, NY NPI 1902980071 Mulder Family Physical Therapy, P.C. Physical Therapist · Hauppauge, NY NPI 1982859765 Shahram Hormozi, M.D., P.C. Interventional Cardiology Physician · Hauppauge, NY NPI 1891932356 Alfonsina Larocca-Tocco Family Nurse Practitioner · Hauppauge, NY NPI 1235512997

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-25.