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MONTGOMERY ENDOCRINOLOGY LLC
NPI 1396042941
Internal Medicine - Endocrinology, Diabetes & Metabolism in Rockville, MD

Active since February 17, 2011
50 W EDMONSTON DR STE 600, ROCKVILLE, MD 20852(301) 251-0662(301) 251-7703 Get Directions Write a Review

NPPES record last updated: February 17, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Montgomery Endocrinology Llc NPPES

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

MONTGOMERY ENDOCRINOLOGY LLC (NPI 1396042941) is a healthcare organization registered as an endocrinology, diabetes & metabolism in Rockville, Maryland and active in the NPI registry since February 2011. The organization lists Monika Mannan, Sole Mbr, as its authorized official.

NPPES Registry Identity

NPI1396042941
Entity TypeOrganization
Primary Taxonomy207RE0101X
Legal Business NameMONTGOMERY ENDOCRINOLOGY LLC
Location Address50 W EDMONSTON DR STE 600Rockville, MD 20852-1254
Mailing AddressPo Box 60528Potomac, MD 20859-0528 · (301) 251-0662 · Fax (301) 251-7703
Phone(301) 251-0662
Fax(301) 251-7703
Organization SubpartNo
Authorized OfficialMonika MannanSole Mbr · (301) 251-0662
Enumeration DateFebruary 17, 2011
✔ NPI 1396042941 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in MD · D0059510
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
50 W EDMONSTON DR STE 600, Rockville, MD 20852
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Montgomery Endocrinology Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by March 31, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateDistrict of ColumbiaEnrollment IDO20110914000561Non-DME Part B · Clinic/Group PracticeDue dateMarch 31, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Montgomery Endocrinology LLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Monika Mannan, MD
Endocrinology
NPI 1558472498
50 W EDMONSTON DR STE 600
Rockville, MD 20852
(301) 251-0662
✔ PECOS✔ Accepts Medicare0.1 mi

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 Montgomery Endocrinology LLC's NPI number?

The NPI number for Montgomery Endocrinology LLC is 1396042941. It was assigned to this organization in the NPPES registry on February 17, 2011.

Where is Montgomery Endocrinology LLC located?

Montgomery Endocrinology LLC is located at 50 W Edmonston Dr Ste 600, Rockville, MD 20852. The listed phone number is (301) 251-0662.

What is Montgomery Endocrinology LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Montgomery Endocrinology LLC enrolled in Medicare?

Yes. Montgomery Endocrinology LLC is registered in the Medicare PECOS enrollment system.

When is Montgomery Endocrinology LLC's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (District of Columbia, Clinic/Group Practice) is due for revalidation by March 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Montgomery Endocrinology LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Endocrinology) reassigns their Medicare billing to Montgomery Endocrinology 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 Montgomery Endocrinology LLC was last updated on February 17, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.