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JAMES LO M.D., MARY LO M.D. S.C.
NPI 1003090077
Internal Medicine in Oak Park, IL

Active since December 26, 2007
1140 W LAKE ST, SUITE 402, OAK PARK, IL 60301(708) 848-0330 Get Directions Write a Review

NPPES record last updated: December 26, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About James Lo M.d., Mary Lo M.d. S.c. NPPES

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

JAMES LO M.D., MARY LO M.D. S.C. (NPI 1003090077) is a healthcare organization registered as an internal medicine in Oak Park, Illinois and active in the NPI registry since December 2007. The organization lists Charles H Lo, President, as its authorized official.

NPPES Registry Identity

NPI1003090077
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameJAMES LO M.D., MARY LO M.D. S.C.
Location Address1140 W LAKE ST, SUITE 402Oak Park, IL 60301-1049
Mailing Address1140 W Lake St, Suite 402Oak Park, IL 60301-1049 · (708) 848-0330
Phone(708) 848-0330
Organization SubpartNo
Authorized OfficialCharles H LoPresident · (708) 848-0330
Enumeration DateDecember 26, 2007
✔ NPI 1003090077 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
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.
1140 W LAKE ST, Oak Park, IL 60301
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Other Identifiers 1

Medicare PIN779180IL

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

James Lo M.d., Mary Lo M.d. S.c. 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 James Lo M.D., Mary Lo M.D. S.C., which bills Medicare for the services this clinician delivers.

Clinician (1)

Charles Lo, MD
Internal Medicine
NPI 1578635173
8 S MICHIGAN AVE STE 1316
Chicago, IL 60603
(872) 444-2473
✔ PECOS9.3 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 James Lo M.D., Mary Lo M.D. S.C.'s NPI number?

The NPI number for James Lo M.D., Mary Lo M.D. S.C. is 1003090077. It was assigned to this organization in the NPPES registry on December 26, 2007.

Where is James Lo M.D., Mary Lo M.D. S.C. located?

James Lo M.D., Mary Lo M.D. S.C. is located at 1140 W Lake St Suite 402, Oak Park, IL 60301. The listed phone number is (708) 848-0330.

What is James Lo M.D., Mary Lo M.D. S.C.'s specialty?

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

Is James Lo M.D., Mary Lo M.D. S.C. enrolled in Medicare?

Yes. James Lo M.D., Mary Lo M.D. S.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through James Lo M.D., Mary Lo M.D. S.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to James Lo M.D., Mary Lo M.D. S.C.. 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 James Lo M.D., Mary Lo M.D. S.C. was last updated on December 26, 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.