Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Calvert Obgyn Associates of Southern Maryland, LLC

Obstetrics & Gynecology Physician in Prince Frederick, MD · enumerated 2007 · authorized official Joseph Tiralla, Managing Member.

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

National Provider Identifier

1104940139

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Registry record

Entity type Organization (Type 2)

Legal business name Calvert Obgyn Associates of Southern Maryland, LLC

Practice address 110 Hospital Rd, Suite 211, Prince Frederick, MD, 20678

Phone (410) 535-3642

Fax (410) 535-6836

Enumeration date Mar 16, 2007

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Joseph Tiralla

Title Managing Member

Phone (410) 535-3642

Other identifiers

Identifier	Type	State	Issuer
2217716	Other	-	AETNA US HEALTHCARE HMO
KAN9CA	Other	-	BLUE SHIELD OF MARYLAND
366483	Other	-	MAMSI - SUITE 202
6906-0000	Other	-	BLUE SHIELD DC
367313	Other	-	MAMSI - SUITE #211
7394046	Other	-	AETNA US HEALTHCARE PPO

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 type of organization is Calvert Obgyn Associates of Southern Maryland, LLC?

Calvert Obgyn Associates of Southern Maryland, LLC is registered in NPPES as a Obstetrics & Gynecology Physician (its primary provider taxonomy).

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.