Mary Elizabeth Sexton, M.D.
Mary Elizabeth Sexton, M.D. is an Infectious Disease Physician in Towson, MD, registered under NPI 1003108606.
Getting there
Here is what surrounds this office in Towson, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 1,018 ft away at Lot 4. 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 0.20 mi away, served by Osler Drive & Auburn Drive Opposite Northbound. If you arrive early, there is a coffee shop 0.49 mi away.
Getting here and what is nearby
Parking Patient/Visitor Parking Garage 494 ft ~2 min
7601 Osler Drive, Towson 21204
Transit Osler Drive & Sister Pierre Drive Northbound 538 ft ~3 min
Transit Osler Drive & Sister Pierre Drive Southbound 591 ft ~3 min
Parking Lot 10 826 ft ~4 min
115 Cross Campus Drive, Towson 21204
Parking Lot 4 1,018 ft ~4 min
7580 Auburn Drive, Towson 21204
Transit Osler Drive & Auburn Drive Opposite Northbound 0.20 mi ~5 min
EV charging 0.27 mi ~6 min
Restaurant Glen Dining Hall 0.28 mi ~6 min
158 Cross Campus Drive, Towson 21204
EV charging 0.33 mi ~7 min
EV charging 0.35 mi ~8 min
Restaurant Dunkin' 0.38 mi ~8 min
281 University Avenue, Towson 21204
Mo-Fr 07:30-14:00; Sa-Su 09:00-14:00
Gas station Marathon 0.40 mi ~8 min
Restaurant Chick-fil-A 0.40 mi ~9 min
Coffee Starbucks 0.43 mi ~9 min
Convenience Royal Farms 0.43 mi ~9 min
7204 York Road, Govans 21212
Coffee Newell Den 0.49 mi ~10 min
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 |
|---|---|---|
| 78135 | GA | Infectious Disease Physician |
| D0103251 | MD | Infectious Disease Physician primary |
Licences are recorded in 2 states: GA, MD. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Infectious Disease
- PAC ID
- 2264702034
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Georgia | I20170727000525 | Practitioner - Infectious Disease |
| Maryland | I20250528000707 | Practitioner - Infectious Disease |
Medicare enrolment is recorded as approved under the provider type Practitioner - Infectious Disease. There are 2 separate enrolment records across 2 states (GA, MD). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. 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: Georgia and Maryland. The practice address on file is in Towson, 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
- D0103251
- Specialty
- Infectious Disease 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 Infectious Disease covers
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine. NUCC Health Care Provider Taxonomy, code 207RI0200X
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 | |
|---|---|---|---|---|
| 207RI0200X | Infectious Disease Physician Infectious Disease | 78135 | GA | |
| 207RI0200X | Infectious Disease Physician Infectious Disease | D0103251 | 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 | 1003108606 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 15, 2011 |
| Last updated | Jun 11, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | M.D. |
| Practice address |
7601 OSLER DR Towson, MD 21204 (410) 337-1207 |
| Mailing address |
5 ALICEVIEW CT Lutherville Timonium, MD 21093 |
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 | 1 | 0 | 8 | 6 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 0 | 7 | 6 | 0 |
Sum = 44 · next multiple of 10 = 50 · check digit = 6 · actual last digit = 6
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.