Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Peter Lou, M.D. P.C.

Q: What type of organization is Peter Lou, M.D. P.C.?

Peter Lou, M.D. P.C. is registered in NPPES as a Ophthalmology Physician (its primary provider taxonomy).

Ophthalmology Physician in Boston, MA · enumerated 2006 · authorized official Sue Singer, Billing Manager.

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

National Provider Identifier

1477626190

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Registry record

Entity type Organization (Type 2)

Legal business name Peter Lou, M.D. P.C.

Practice address 10 Hawthorne Pl, Suite 106, Boston, MA, 02114

Phone (617) 523-0955

Fax (617) 523-5376

Enumeration date Nov 17, 2006

Last updated in NPPES Nov 19, 2010

Taxonomy & classification

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 41309 (MA) Primary

Authorized official

Name Sue Singer

Title Billing Manager

Phone (617) 523-0955

Other identifiers

Identifier	Type	State	Issuer
2061538	Medicaid	MA	-

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 is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Peter Lou, M.D. P.C.?

Peter Lou, M.D. P.C. is registered in NPPES as a Ophthalmology Physician (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-11-19.