Catherine Ulanga
Catherine Ulanga is a Gerontology Nurse Practitioner in Lynn, MA, registered under NPI 1003531757.
Getting there
Here is what surrounds this office in Lynn, based on OpenStreetMap data collected Oct 3, 2026. Parking is available about 0.37 mi away at MBTA Parking Garage. The nearest transit stop is 704 ft away, served by Broad St opp Nahant St.
Getting here and what is nearby
Transit Union St @ Smith St 700 ft ~3 min
Transit Broad St @ Silsbee St 702 ft ~3 min
Transit Broad St opp Nahant St 704 ft ~3 min
Restaurant Pho Minh Ky 767 ft ~3 min
Restaurant Thai Cafe 805 ft ~4 min
Grocery Ironbound Marketplace & Food Emporium 789 ft ~3 min
Restaurant Domino's 0.22 mi ~5 min
341-347 Union Street, Lynn 01901
Mo-We 10:30-01:00; Th-Sa 10:30-02:00; Su 10:30-01:00
Grocery Poblano's Mexican Grocery 0.25 mi ~5 min
Parking 0.26 mi ~6 min
Parking 0.27 mi ~6 min
Convenience Cal's News 0.35 mi ~8 min
Parking MBTA Parking Garage 0.37 mi ~8 min
445 Union Street, Lynn 01901
Gas station Speedway 0.42 mi ~9 min
Grocery Contreas Grocery 0.44 mi ~9 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 |
|---|---|---|
| RN2312927 | MA | Gerontology Nurse Practitioner primary |
This provider holds licence RN2312927 issued in MA. 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 Gerontology covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LG0600X
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 | 1003531757 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 5, 2022 |
| Last updated | Oct 20, 2022 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Practice address |
37 FRIEND ST Lynn, MA 01902 (303) 564-8129 |
| Mailing address |
148 DALTON RD Chelmsford, MA 01824 |
| Other names |
Catherine Njagi Doing Business As |
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 | 5 | 3 | 1 | 7 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 3 | 2 | 7 | 1 |
Sum = 43 · next multiple of 10 = 50 · 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.