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SISOM OSIA, M.D./ GATEWAY MEDICAL CENTER
NPI 1689621203
Internal Medicine in Upper Marlboro, MD

Active since May 28, 2006
9628 MARLBORO PIKE, UPPER MARLBORO, MD 20772(301) 599-7010(301) 599-1222 Get Directions Write a Review

NPPES record last updated: March 8, 2010. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Sisom Osia, M.d./ Gateway Medical Center NPPES

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

SISOM OSIA, M.D./ GATEWAY MEDICAL CENTER (NPI 1689621203) is a healthcare organization registered as an internal medicine in Upper Marlboro, Maryland and active in the NPI registry since May 2006. The organization lists Sisom Osia, President, as its authorized official.

NPPES Registry Identity

NPI1689621203
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameFRANK & GRACE, INC.
Location Address9628 MARLBORO PIKEUpper Marlboro, MD 20772
Mailing AddressPo Box 2070Upper Marlboro, MD 20773-2070 · (301) 599-7010 · Fax (301) 599-1222
Phone(301) 599-7010
Fax(301) 599-1222
Organization SubpartNo
Authorized OfficialSisom OsiaPresident · (301) 599-7010
Enumeration DateMay 28, 2006
Last NPPES UpdateMarch 8, 2010
✔ NPI 1689621203 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MD · D0048158
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
9628 MARLBORO PIKE, Upper Marlboro, MD 20772
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Other Names 1

Doing Business AsSisom Osia, M.d./ Gateway Medical Center

Other Identifiers 3

Medicaid051701101MD
Medicare UPINH07083
Medicare ID-Type UnspecifiedG00707

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)

Sisom Osia, M.d./ Gateway Medical Center 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 IDO20051118000298Non-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 Sisom Osia, M.D./ Gateway Medical Center, which bills Medicare for the services this clinician delivers.

Clinician (1)

Sisom Osia, M.D
Internal Medicine
NPI 1154442366
9628 MARLBORO PIKE
Upper Marlboro, MD 20772
(301) 599-7010
✔ 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 Frank & Grace, Inc.'s NPI number?

The NPI number for Frank & Grace, Inc. is 1689621203. It was assigned to this organization in the NPPES registry on May 28, 2006. The provider is doing business as Sisom Osia, M.D./ Gateway Medical Center.

Where is Frank & Grace, Inc. located?

Frank & Grace, Inc. is located at 9628 Marlboro Pike, Upper Marlboro, MD 20772. The listed phone number is (301) 599-7010.

What is Frank & Grace, Inc.'s specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Frank & Grace, Inc. enrolled in Medicare?

Yes. Frank & Grace, Inc. is registered in the Medicare PECOS enrollment system.

When is Frank & Grace, Inc.'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 Frank & Grace, Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Frank & Grace, Inc.. 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 Frank & Grace, Inc. was last updated on March 8, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.