Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katherine Mary Merra, MD

Orthopaedic Surgery Physician in Hingham, MA · enumerated 2005.

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

National Provider Identifier

1336140425

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Registry record

Entity type Individual (Type 1)

Name Katherine Mary Merra

Credential MD

Sex Female

Practice address 2 Pond Park Rd., Ste. 102, Hingham, MA, 02043

Phone (781) 337-5555

Fax (781) 331-0300

Enumeration date Aug 10, 2005

Last updated in NPPES Oct 13, 2011

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 74730 (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
0016866	Other	-	NHP
3079902	Medicaid	MA	-
719345	Other	-	TUFTS HEALTH PLAN
719345	Other	-	TUFTS MEDICARE PREFERRED
042297845	Other	-	HCVM/FIRST HEATLH/COVENTY
900324	Other	-	UNITED HEALTH CARE
J11386	Other	-	BLUE SHIELD
042297845	Other	-	TRICARE
042297845	Other	-	PHCS/MULTI-PLAN
B20458702	Other	-	CIGNA HEALTH CARE
000233	Other	-	ONE HEALTH
042297845	Other	-	GREAT WEST HEALTH CARE
80314	Other	-	GIC/UNICARE
53309	Other	-	FALLON
171346	Other	-	HARVARD PILGRIM HEALTH
3681368	Other	-	AETNA

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

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 Katherine Merra?

Katherine Merra is registered in NPPES with the primary taxonomy of Orthopaedic Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-10-13.