Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jakow Diener, M.D.

Medical Oncology Physician in Bethlehem, NH · enumerated 2006.

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

National Provider Identifier

1902872971

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Registry record

Entity type Individual (Type 1)

Name Jakow Diener

Credential M.D.

Sex Male

Practice address 360 Brook Rd, Bethlehem, NH, 03574

Phone (603) 616-9916

Enumeration date Feb 28, 2006

Last updated in NPPES Jul 21, 2021

Taxonomy & licenses

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 12255 (NH) 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
80300008	Medicaid	NH	-
5414126	Other	NH	CIGNA HEALTHCARE
384132	Other	NH	MVP
1010617	Medicaid	VT	-
AA38042	Other	NH	HARVARD PILGRIM HEALTHCAR
0196371	Medicaid	OH	-
01Y007264NH01	Other	NH	BLUE CROSS/BLUE SHIELD

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

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.

What specialty is Jakow Diener?

Jakow Diener is registered in NPPES with the primary taxonomy of Medical Oncology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-21.