Chastity Stemmer
Chastity Stemmer is a Behavior Technician in Baltimore, MD, registered under NPI 1003480138. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Baltimore, based on OpenStreetMap data collected Sep 29, 2026. Parking is available about 0.22 mi away. There is EV charging 0.39 mi from the office (Tesla Supercharger) — useful if you are driving in from out of town. The nearest transit stop is 727 ft away. A pharmacy sits 0.41 mi from the entrance (Johns Hopkins Outpatient Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.28 mi away.
Getting here and what is nearby
Parking 361 ft ~2 min
Convenience 7-Eleven 546 ft ~3 min
Parking 629 ft ~3 min
Transit 665 ft ~3 min
Transit Eastern Avenue & Hornel Street Far-side Westbound 709 ft ~3 min
Transit 727 ft ~3 min
Convenience Tiger Mart 728 ft ~3 min
6408 Eastern Avenue, Baltimore 21224
Gas station Exxon 763 ft ~3 min
Restaurant Wendy's 788 ft ~3 min
6411 Eastern Avenue, Baltimore 21224
Gas station Carroll Motor Fuels 915 ft ~4 min
Coffee Las Esperanzas Café 968 ft ~4 min
Restaurant McDonald's 960 ft ~4 min
6540 Eastern Avenue, Baltimore 21224
05:30-22:00
Grocery Save Mart 944 ft ~4 min
Restaurant Subway 989 ft ~4 min
6500 Eastern Avenue, Baltimore 21224
Mo-Fr 08:00-21:30; Sa 08:00-21:00; Su 09:00-20:00
Parking 0.22 mi ~5 min
Convenience Wawa 0.27 mi ~6 min
Coffee J.C. Romero's Neighborhood Cafe 0.28 mi ~6 min
Grocery Koko Market 0.28 mi ~6 min
6020 Eastern Avenue, Baltimore 21224
Mo-Sa 09:00-22:00, Su 09:00-21:00
Hotel Hampton Inn Baltimore Bayview Campus 0.29 mi ~6 min
Gas station Marathon 0.37 mi ~8 min
5802 Eastern Avenue, Baltimore 21224
EV charging Tesla Supercharger 0.39 mi ~8 min
Pharmacy Johns Hopkins Outpatient Pharmacy 0.41 mi ~9 min
4940 Eastern Avenue, Baltimore 21224
Grocery Eastern Grocery & Mas 0.48 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
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
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 Behavior Technician covers
The behavior technician is a paraprofessional who practices under the close, ongoing supervision of a behavior analyst or assistant behavior analyst certified by the Behavior Analyst Certification Board and/or credentialed by a state (such as through licensure). The behavior technician is primarily responsible for the implementation of components of behavior-analytic treatment plans developed by the supervisor. That may include collecting data on treatment targets and conducting certain types of behavioral assessments (e.g., stimulus preference assessments). The behavior technician does not design treatment or assessment plans or procedures but provides services as assigned by the supervisor responsible for his or her work. NUCC Health Care Provider Taxonomy, code 106S00000X
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 | 1003480138 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 13, 2021 |
| Last updated | Jun 24, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Practice address |
334 IMLA ST Baltimore, MD 21224 (301) 639-0453 |
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 | 4 | 8 | 0 | 1 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 8 | 0 | 1 | 6 |
Sum = 52 · next multiple of 10 = 60 · check digit = 8 · actual last digit = 8
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.