John Loh
Internal Medicine Physician · Baltimore, MD
John Loh is an internal medicine physician with a practice address in Baltimore, Maryland, and NPI 1306852827, issued on Aug 1, 2006. Check the license (Maryland H0035593, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- John Loh
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- H0035593 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1124 Mace Ave, Baltimore, MD 21221
- Phone
- (410) 391-6996
- Enumerated
- Aug 1, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (410) 687-6877
- Medicare enrollment
- Enrolled (PECOS I20090303000276); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Human Medicine, 1984
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1124 Mace Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Chukwuma EboInternal Medicine Physician1275548729
- Nebiyu Eshetu, M.D.Hospitalist Physician1407275357
- Sherri Fuget, L.M.T.Massage Therapist1376893602
- Ololade Ikuomola, NP-CPrimary Care Nurse Practitioner1114457421
- John Lee, M.D.Internal Medicine Physician1275849051
- Lauren Lokey, MSN, FNP-CFamily Nurse Practitioner1134536170
Verify John Loh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license H0035593Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average internal medicine physician in 2024
6,780 Medicare Part D claims for 400 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 142 claims were for opioids.
Most prescribed
- Atorvastatin Calcium386 claims
- Amlodipine Besylate237 claims
- Losartan Potassium217 claims
- Lisinopril210 claims
- Pantoprazole Sodium209 claims
- Levothyroxine Sodium208 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,724.60
91 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mace Medical LLCBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
1,278 internal medicine physician records list a practice address in Baltimore
They are 1,278 of the 35,183 NPPES records with a practice address in Baltimore, and 3,904 internal medicine physician records in Maryland.
All 1,278 in Baltimore → All 3,904 in Maryland → Every provider in Baltimore →
Other internal medicine physician records in Maryland
- Eduardo Abarca Rojas, M.D.Parkville, MD1538447628
- Rasheed Abassi, M.D.Clinton, MD1376608620
- Ghulam Abbas, MDFrederick, MD1477658045
- Shamima Abbas, MDKensington, MD1750445896
- Nourelhuda Abbas Hamed, MDSilver Spring, MD1699339473
- Arsalan Abbasi, MDWestminster, MD1942762604
- Hamdi AbdeenGaithersburg, MD1245972413
- Mukemil Abdella, M.D.Glenn Dale, MD1871603381
- Suzan Abdo, MDClarksville, MD1588631824
- Madeeha Abdul GhaffarElkton, MD1194276063
Common questions
What is John Loh's NPI number?
John Loh's National Provider Identifier (NPI) is 1306852827, issued on Aug 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Loh located?
The NPPES record lists a practice address at 1124 Mace Ave, Baltimore, MD, 21221. Phone: (410) 391-6996. Providers update this record themselves, so call before visiting.
How can I verify John Loh's license?
NPPES lists Maryland license number H0035593, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Loh prescribe under Medicare Part D?
In 2024, John Loh had 6,780 Medicare Part D claims for 400 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.