Barry Alan Firstenberg, DO

Barry Alan Firstenberg is a Hematology & Oncology Physician provider (Internal Medicine) practicing in Grapevine, TX, registered in the NPPES registry with NPI 1215939764 since 2005. The credential DO stands for Doctor of Osteopathic Medicine.

✓ Active NPI ✓ Valid NPI checksum

NPI	1215939764
Entity type	Individual (Type 1)
Name	Barry Alan Firstenberg
Credential	DO
Sex	Male
Practice address	1631 LANCASTER DR STE 150, Grapevine, TX, 76051
Phone	8172519080
Fax	8172519082
Enumeration date	2005-08-15
Last updated in NPPES	2021-11-16

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
207RH0003X	Hematology & Oncology Physician	Primary	G6294	TX

DO — Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
115782814	Medicaid	TX	—
115782813	Medicaid	TX	—
115782812	Medicaid	TX	—
115782811	Medicaid	TX	—

Copy-ready billing details

Provider: Barry Firstenberg, DO
NPI: 1215939764
Taxonomy: 207RH0003X (Hematology & Oncology Physician)
Address: 1631 LANCASTER DR STE 150, Grapevine, TX, 76051

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1124198411	Mary Sutton	Individual	Nurse Practitioner	Grapevine, TX
1396089967	Kristina Longo	Individual	Family Nurse Practitioner	Grapevine, TX
1215678487	Ivey Walker	Individual	Family Nurse Practitioner	Grapevine, TX

Verify this record

Cross-check NPI 1215939764 against the authoritative CMS record: view Barry Alan Firstenberg on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

What specialty is Barry Firstenberg?

Barry Firstenberg is registered in NPPES with the primary taxonomy of Hematology & Oncology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-10. Provider record last updated 2021-11-16.