JOHN J LOH ,D. O.,P A
NPI 1083854053
Internal Medicine in Baltimore, MD

Active since March 03, 2009CLIA 21D0907269 · Waiver
1124 MACE AVE, BALTIMORE, MD 21221(410) 391-6996(410) 687-6877 Get Directions Write a Review

NPPES record last updated: March 3, 2009. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About John J Loh ,d. O.,p A NPPES

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

JOHN J LOH ,D. O.,P A (NPI 1083854053) is a healthcare organization registered as an internal medicine in Baltimore, Maryland and active in the NPI registry since March 2009. The organization holds a CLIA Waiver certificate valid through October 10, 2027 and lists John J Loh, President, as its authorized official.

NPPES Registry Identity

NPI1083854053
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameJOHN J LOH ,D. O.,P A
Location Address1124 MACE AVEBaltimore, MD 21221-3315
Mailing Address1124 Mace AveBaltimore, MD 21221-3315 · (410) 391-6996 · Fax (410) 687-6877
Fax(410) 687-6877
Organization SubpartNo
Authorized OfficialJohn J LohPresident · (410) 391-6996
Enumeration DateMarch 3, 2009
NPI 1083854053 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 · H0035593
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.
1124 MACE AVE, Baltimore, MD 21221

Other Identifiers 3

Medicare PIN5385MD
Medicaid209641200MD
Medicare UPIND76268MD

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

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 21D0907269

Dr John Loh · Baltimore, MD
Active · expires Oct 10, 2027
CLIA Number21D0907269
Laboratory TypePhysician Office
Certificate Effective DateOctober 11, 2025
Certificate Expiration DateOctober 10, 2027
Laboratory DirectorJohn Loh Do
Laboratory Phone(410) 391-6996
Laboratory LocationDr John Loh1124 Mace Avenue, Baltimore, MD 21221
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Internal Medicine
1124 MACE AVE
BALTIMORE, MD 21221
Obstetrics & Gynecology
1124 MACE AVE
ESSEX, MD 21221
Internal Medicine
1124 MACE AVE
BALTIMORE, MD 21221
Internal Medicine
1124 MACE AVE
ESSEX, MD 21221
Nurse Practitioner (Primary Care)
1124 MACE AVE
BALTIMORE, MD 21221
Nurse Practitioner (Family)
1124 MACE AVE
BALTIMORE, MD 21221
Nurse Practitioner
1124 MACE AVE
ESSEX, MD 21221
Internal Medicine
1124 MACE AVE
BALTIMORE, MD 21221

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 John J Loh ,d. O.,p A's NPI number?

The NPI number for John J Loh ,d. O.,p A is 1083854053. It was assigned to this organization in the NPPES registry on March 3, 2009.

Where is John J Loh ,d. O.,p A located?

John J Loh ,d. O.,p A is located at 1124 Mace Ave, Baltimore, MD 21221. The listed phone number is (410) 391-6996.

What is John J Loh ,d. O.,p A's specialty?

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

Does John J Loh ,d. O.,p A hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 21D0907269) is associated with this NPI, valid through October 10, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for John J Loh ,d. O.,p A was last updated on March 3, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.