Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joshua Laurence Tarkan, M.D.

Nephrology Physician in Newburyport, MA · enumerated 2006.

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

National Provider Identifier

1922104884

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Registry record

Entity type Individual (Type 1)

Name Joshua Laurence Tarkan

Credential M.D.

Sex Male

Practice address 260 Merrimac St, Newburyport, MA, 01950

Phone (978) 499-7400

Fax (978) 499-7326

Enumeration date Sep 16, 2006

Last updated in NPPES Apr 23, 2016

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 220460 (MA) 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
89-01537	Other	MA	EVERCARE
P00423457	Other	MA	RR MEDICARE
1504440	Other	MA	CIGNA
1922104884	Other	MA	AETNA
1922104884	Other	MA	FALLON COMMUNITY HEALTH PLAN
7796604	Other	MA	AETNA NON HMO
AA90052	Other	MA	HARVARD PILGRIM HEALTHCAR
0041051	Other	MA	NEIGHBORHOOD HEALTH PLAN
30206633	Other	NH	NH MEDICAID
967291-02	Other	MA	NETWORK HEALTH PLAN
110037949A	Medicaid	MA	-
469461	Other	MA	TUFTS HEALTH PLAN
J28466	Other	MA	BLUE CROSS OF MASS.

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.

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Frequently asked questions

What specialty is Joshua Tarkan?

Joshua Tarkan is registered in NPPES with the primary taxonomy of Nephrology 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-23.