Quick answers
- Where does John J. Loh see patients?
- Medicare's clinician data lists 2 practice locations, including Baltimore, MD and Dundalk, MD. Call before your visit to confirm the address.
- What is John J. Loh's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John J. Loh accept Medicare assignment?
- Yes. Medicare's clinician data says John J. Loh accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does John J. Loh offer telehealth?
- Medicare's clinician data says John J. Loh offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John J. Loh?
- (410) 391-6996, as listed in official Medicare / NPI Registry data.
- What is John J. Loh's NPI number?
- 1306852827. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John J. Loh is enrolled with Medicare (CMS data updated 2026-10-02).
- 1124 Mace AveBaltimore, MD 21221 (410) 391‑6996
- 2800 Sollers Point RdDundalk, MD 21222 (410) 391‑6996
Group practices
Medicare enrollment lists John J. Loh as a member of this group (CMS data updated 2026-10-02).
- Mace Medical LLC14 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Baltimore
Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Michigan State University College Of Human Medicine |
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1306852827 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians