Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jonathan P Metzger, MD

Internal Medicine Physician in Kingston, MA · enumerated 2005.

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

National Provider Identifier

1376524314

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Registry record

Entity type Individual (Type 1)

Name Dr. Jonathan P Metzger

Credential MD

Sex Male

Practice address 5 Tarkiln Rd, Kingston, MA, 02364

Phone (781) 585-2200

Fax (781) 585-1784

Enumeration date Nov 8, 2005

Last updated in NPPES Jan 21, 2014

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 156683 (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
156683	Other	MA	TUFTS
03179702	Medicaid	MA	-
04 2297845	Other	MA	TRICARE
5972719	Other	MA	AETNA
04 2297845	Other	MA	HCVM
0016433	Other	MA	NEIGHBORHOOD HLTH PLAN
04 2297845	Other	MA	DOC FIRST
04 2297845	Other	MA	PRIVATE HEALTHCARE SYSTEM
04 2297845	Other	MA	UNITED HEALTH CARE
66933	Other	MA	HVD PILGRIM HEALTH CARE
B10349001	Other	MA	CIGNA
04 2297845	Other	MA	GREAT WEST HEALTH CARE
36394	Other	MA	FALLON
J18873	Other	MA	BCBS
04 2297845	Other	MA	GIC UNICARE

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 specialty is Jonathan Metzger?

Jonathan Metzger is registered in NPPES with the primary taxonomy of Internal Medicine 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.

Other providers at this practice address

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Michelle Cahill Physician Assistant · Kingston, MA NPI 1457341315 Margaret Anastasi Nurse Practitioner · Kingston, MA NPI 1891786786 Thomas Castiglione Internal Medicine Physician · Kingston, MA NPI 1770553539

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-21.