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T. ANN TONNU, M.D., LLC
NPI 1811170954
Specialist in Gaithersburg, MD

Active since December 12, 2007
9057 SHADY GROVE CT, GAITHERSBURG, MD 20877(301) 721-1614(301) 721-1624 Get Directions Write a Review

NPPES record last updated: December 12, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About T. Ann Tonnu, M.d., Llc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

T. ANN TONNU, M.D., LLC (NPI 1811170954) is a healthcare organization registered as a specialist in Gaithersburg, Maryland and active in the NPI registry since December 2007. The organization lists Tuanh Tonnu, Owner, as its authorized official.

NPPES Registry Identity

NPI1811170954
Entity TypeOrganization
Primary Taxonomy174400000X
Legal Business NameT. ANN TONNU, M.D., LLC
Location Address9057 SHADY GROVE CTGaithersburg, MD 20877-1301
Mailing Address9057 Shady Grove CtGaithersburg, MD 20877-1301 · (301) 721-1614 · Fax (301) 721-1624
Phone(301) 721-1614
Fax(301) 721-1624
Organization SubpartNo
Authorized OfficialTuanh TonnuOwner · (301) 721-1614
Enumeration DateDecember 12, 2007
✔ NPI 1811170954 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in MD · D0047295
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
9057 SHADY GROVE CT, Gaithersburg, MD 20877
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Other Identifiers 2

Medicaid695400600MD
Medicare UPING14268

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

T. Ann Tonnu, M.d., Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to T. Ann Tonnu, M.D., LLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Tuanh Tonnu, MD
Gastroenterology
NPI 1083723878
9057 SHADY GROVE CT
Gaithersburg, MD 20877
(301) 721-1614
✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is T. Ann Tonnu, M.D., LLC's NPI number?

The NPI number for T. Ann Tonnu, M.D., LLC is 1811170954. It was assigned to this organization in the NPPES registry on December 12, 2007.

Where is T. Ann Tonnu, M.D., LLC located?

T. Ann Tonnu, M.D., LLC is located at 9057 Shady Grove Ct, Gaithersburg, MD 20877. The listed phone number is (301) 721-1614.

What is T. Ann Tonnu, M.D., LLC's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is T. Ann Tonnu, M.D., LLC enrolled in Medicare?

Yes. T. Ann Tonnu, M.D., LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through T. Ann Tonnu, M.D., LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Gastroenterology) reassigns their Medicare billing to T. Ann Tonnu, M.D., LLC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for T. Ann Tonnu, M.D., LLC was last updated on December 12, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.