Yonas Sisay, M.D.
Yonas Sisay, M.D. is an Internal Medicine Physician in Baltimore, MD, registered under NPI 1003020439.
Getting there
Here is what surrounds this office in Baltimore, based on OpenStreetMap data collected Aug 30, 2026. Parking is available about 0.26 mi away. The nearest transit stop is 573 ft away, served by Saint Paul Street & East Madison Street. A pharmacy sits 0.38 mi from the entrance (Community, A Walgreens Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.27 mi away.
Getting here and what is nearby
Restaurant Yung’s Carry Out 29 ft ~1 min
Restaurant Dunkin' 140 ft ~1 min
840 Guilford Avenue, Baltimore 21202
Mo-Fr 05:00-21:00; Sa-Su 06:00-21:00
Transit Madison Street & Guilford Avenue Westbound 257 ft ~1 min
Restaurant Iggie's 275 ft ~2 min
818 North Calvert Street, Baltimore 21202
Tu-Th 11:30-21:00; Fr-Sa 11:30-22:00; Su 11:30-20:00; Mo closed
Transit Fallsway & Madison Street Northbound 498 ft ~2 min
Convenience Saint Paul Mini Mart 503 ft ~2 min
815 Saint Paul Street, Baltimore 21202
Hotel Midtown Inn 534 ft ~3 min
721 Saint Paul Street
Transit Saint Paul Street & East Madison Street 573 ft ~3 min
Parking 601 N Calvert Street Garage 770 ft ~3 min
Hotel Ulysses 942 ft ~4 min
Coffee Dooby's 0.20 mi ~4 min
802 North Charles Street, Baltimore 21201
Mo-Sa 08:00-17:00; Su 08:00-15:00
Pharmacy CVS Pharmacy 0.24 mi ~5 min
Coffee Maestro's Café 0.25 mi ~6 min
5 East Centre Street, Baltimore 21202
Convenience 7-Eleven 0.26 mi ~6 min
Parking Park PMI 0.26 mi ~6 min
1017 North Charles Street, Baltimore 21201
Parking 0.26 mi ~6 min
521 Lovegrove Street, Baltimore 21202
Coffee Cafe Fili 0.27 mi ~6 min
816 Cathedral Street, Baltimore 21201
Mo-Sa 08:00-19:00; Su 09:00-16:00
Hotel Belvedere Hotel 0.27 mi ~6 min
Pharmacy Mt. Vernon Pharmacy 0.29 mi ~6 min
Convenience Happy Market 0.32 mi ~7 min
1001 Greenmount Avenue, Baltimore 21202
Pharmacy Community, A Walgreens Pharmacy 0.38 mi ~8 min
1114 Cathedral Street, Baltimore 21201
Gas station Front Street Fuel Station (Government only) 0.44 mi ~9 min
405 Fallsway, Baltimore 21202
Gas station Carroll Motor Fuels 0.44 mi ~9 min
Grocery OK Market & Deli 0.48 mi ~10 min
753 East Preston Street, Baltimore 21202
Grocery Po Tung Oriental Grocery 0.49 mi ~10 min
Gas station Marathon 0.50 mi ~11 min
901 Orleans Street, Baltimore 21202
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 |
|---|---|---|
| D0057228 | MD | Internal Medicine Physician primary |
This provider holds licence D0057228 issued in MD. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
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
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 | 1003020439 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 8, 2007 |
| Last updated | Jul 8, 2007 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | M.D. |
| Practice address |
822 GUILFORD AVE #100 Baltimore, MD 21202 (410) 385-9672 |
| Mailing address |
5375 DUKE ST # 704 Alexandria, VA 22304 |
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 | 2 | 0 | 4 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 2 | 0 | 4 | 6 |
Sum = 41 · next multiple of 10 = 50 · check digit = 9 · actual last digit = 9
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.