Leonard Sowah, M.D.
Leonard Sowah, M.D. is an Internal Medicine Physician in Baltimore, MD, registered under NPI 1003007824.
Getting there
Here is what surrounds this office in Baltimore, based on OpenStreetMap data collected Aug 28, 2026. Parking is available about 866 ft away at Penn Street Garage. There is EV charging 0.35 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 307 ft away, served by Baltimore Street & University of Maryland Transit Center Mid-block. A pharmacy sits 0.40 mi from the entrance (Rite Aid), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.21 mi away.
Getting here and what is nearby
Transit Greene Street & Lombard Street Near-side Southbound 286 ft ~2 min
Transit 293 ft ~2 min
Transit Baltimore Street & University of Maryland Transit Center Mid-block 307 ft ~2 min
Parking Plaza Garage 450 ft ~2 min
Convenience 7-Eleven 628 ft ~3 min
Coffee Cafe on the Square 691 ft ~3 min
Parking Pratt Street Garage 673 ft ~3 min
Pharmacy University of Maryland Medical Center Pharmacy 683 ft ~3 min
11 South Paca Street, Baltimore 21201
Coffee Starbucks 772 ft ~3 min
Parking Penn Street Garage 866 ft ~4 min
Restaurant Potbelly 865 ft ~4 min
Restaurant Ono Poké 870 ft ~4 min
411 West Baltimore Street, Baltimore 21201
Restaurant Jano 916 ft ~4 min
400 West Lombard Street, Baltimore 21201
EV charging ChargePoint 925 ft ~4 min
Hotel Baltimore Marriott Inner Harbor Camden Yards 964 ft ~4 min
Hotel Hampton Inn 0.20 mi ~5 min
Coffee Starbucks 0.21 mi ~5 min
Hotel SpringHill Suites Baltimore Downtown Convention Center Area 0.23 mi ~5 min
Convenience Sonoco 0.26 mi ~6 min
400 Russell Street, Baltimore 21230
Gas station Sunoco 0.26 mi ~6 min
Pharmacy Lexington Pharmacy 0.29 mi ~6 min
EV charging 0.35 mi ~8 min
EV charging 0.35 mi ~8 min
Gas station Exxon 0.35 mi ~7 min
Grocery 7 Food Market 0.36 mi ~8 min
Convenience 7-Eleven 0.38 mi ~8 min
Gas station Gulf 0.39 mi ~8 min
417 West Mulberry Street, Baltimore 21201
Pharmacy Rite Aid 0.40 mi ~9 min
300 North Martin Luther King Jr. Boulevard, Baltimore 21201
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 036117582 | IL | Internal Medicine Physician |
| D66464 | MD | Internal Medicine Physician primary |
Licences are recorded in 2 states: IL, MD. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Internal Medicine
- PAC ID
- 3375675291
- Enrollment ID
- I20100713000101
Medicare enrolment is recorded as approved under the provider type Practitioner - Internal Medicine. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
Licensed in 2 states
This provider holds licences in 2 states: Illinois and Maryland. The practice address on file is in Baltimore, MD, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- D66464
- Specialty
- Internal Medicine Physician
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Internal Medicine covers
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. NUCC Health Care Provider Taxonomy, code 207R00000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | 036117582 | IL | |
| 207R00000X | Internal Medicine Physician | D66464 | MD | primary |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003007824 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 6, 2007 |
| Last updated | Jul 15, 2020 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | M.D. |
| Practice address |
22 S GREENE ST Baltimore, MD 21201 (410) 706-4619 Fax (410) 706-2062 |
| Mailing address |
PO BOX 64442 Baltimore, MD 21264 |
| Other identifiers |
510361400
· Medicaid (MD) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 0 | 0 | 7 | 8 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 0 | 5 | 8 | 4 |
Sum = 46 · next multiple of 10 = 50 · check digit = 4 · actual last digit = 4
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.