GUIDELIGHT HEALTH SERVICES, LLC
GUIDELIGHT HEALTH SERVICES, LLC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1821920257, based in Baltimore, MD. The organization lists 3 taxonomy classifications, with Mental Health Clinic/Center (Including Community Mental Health Center) recorded as primary.
Getting there
The practice address on file is 729 E PRATT ST STE 400, Baltimore, MD 21202. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
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 Mental Health (Including Community Mental Health Center) covers
Definition to come... NUCC Health Care Provider Taxonomy, code 261QM0801X
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 | |
|---|---|---|---|---|
| 261QM0801X | Mental Health Clinic/Center (Including Community Mental Health Center) Mental Health (Including Community Mental Health Center) | — | — | primary |
| 261QM0850X | Adult Mental Health Clinic/Center Adult Mental Health | — | — | |
| 261QM0855X | Adolescent and Children Mental Health Clinic/Center Adolescent and Children Mental Health | — | — |
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1821920257 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Jun 1, 2026 |
| Last updated | Jun 1, 2026 |
| Status | Active |
| Practice address |
729 E PRATT ST STE 400 Baltimore, MD 21202 (508) 761-0903 Fax (888) 251-9515 |
| Mailing address |
101 FEDERAL ST STE 1900 Boston, MA 02110 |
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 | 8 | 2 | 1 | 9 | 2 | 0 | 2 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 4 | 1 | 9 | 2 | 0 | 2 | 1 |
Sum = 53 · next multiple of 10 = 60 · check digit = 7 · actual last digit = 7
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.