Theresa Ruddy, C.P.N.P., CRNP
Theresa Ruddy, C.P.N.P., CRNP is an Acute Care Nurse Practitioner in Baltimore, MD, registered under NPI 1003189861. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Baltimore, based on OpenStreetMap data collected Aug 29, 2026. Parking is available about 0.22 mi away at McElderry Garage. The nearest transit stop is 511 ft away, served by Monument Street & Rutland Avenue Eastbound. A pharmacy sits 0.30 mi from the entrance (Walgreens), 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
Coffee Cobblestone Cafe 310 ft ~2 min
Transit Johns Hopkins Northbound 459 ft ~2 min
Transit Wolfe Street & McElderry Street Far-side 480 ft ~2 min
Transit Monument Street & Rutland Avenue Eastbound 511 ft ~2 min
Pharmacy Johns Hopkins Outpatient Pharmacy 577 ft ~3 min
Parking Orleans Street Garage 732 ft ~3 min
Restaurant Mama Mia’s 852 ft ~4 min
700 North Broadway, Baltimore 21205
Gas station Amoco 901 ft ~4 min
Restaurant Popeyes 931 ft ~4 min
Restaurant Dunkin' 1,023 ft ~4 min
2001 East Monument Street, Baltimore 21205
Mo-Fr 05:00-19:00; Sa-Su 06:00-17:00
Convenience Black Diamond Smoke Shop and Deli 0.20 mi ~4 min
2003 East Monument Street, Baltimore 21205
Parking Washington Hill Lot 0.20 mi ~4 min
Convenience 7-Eleven 0.22 mi ~5 min
Gas station Citgo 0.22 mi ~5 min
2001 Orleans Street, Baltimore 21231
Parking McElderry Garage 0.22 mi ~5 min
555 North Caroline Street, Baltimore 21205
Hotel Residence Inn 0.23 mi ~5 min
Pharmacy CVS Pharmacy 0.24 mi ~5 min
Coffee Starbucks 0.27 mi ~6 min
Convenience Super Save 0.29 mi ~6 min
2100 East Monument Street, Baltimore 21205
Pharmacy Walgreens 0.30 mi ~6 min
900 North Washington Street
Gas station BP 0.46 mi ~10 min
1300 East Fayette Street, Baltimore 21231
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 |
|---|---|---|
| R183328 | MD | Acute Care Nurse Practitioner primary |
| R183328 | MD | Registered Nurse |
| RN1008855 | DC | Registered Nurse |
Licences are recorded in 2 states: MD, DC. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
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.
Licensed in 2 states
This provider holds licences in 2 states: District of Columbia 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
- R183328
- Specialty
- Acute Care Nurse Practitioner
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 Acute Care covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LA2100X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 363LA2100X | Acute Care Nurse Practitioner Acute Care | R183328 | MD | primary |
| 163W00000X | Registered Nurse | R183328 | MD | |
| 163W00000X | Registered Nurse | RN1008855 | DC |
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 | 1003189861 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 9, 2012 |
| Last updated | Jul 2, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | C.P.N.P., CRNP |
| Practice address |
600 N WOLFE ST Baltimore, MD 21287 (410) 955-5260 |
| Mailing address |
6201 GREENLEIGH AVE Baltimore, MD 21220 |
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 | 8 | 9 | 8 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 8 | 9 | 8 | 3 |
Sum = 59 · next multiple of 10 = 60 · check digit = 1 · actual last digit = 1
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.