Katherine Fezzi, LMSW
Katherine Fezzi, LMSW is a provider specialising in Social Worker in Saint Louis, MO, registered under NPI 1003643461.
Getting there
Here is what surrounds this office in Saint Louis, based on OpenStreetMap data collected Oct 12, 2026. Parking is available about 0.31 mi away. The nearest transit stop is 818 ft away, served by Clayton at Skinker. If you arrive early, there is a coffee shop 0.34 mi away.
Getting here and what is nearby
Parking 175 ft ~1 min
Parking 200 ft ~1 min
Transit Clayton at DeMun 362 ft ~2 min
Hotel Cheshire Inn 355 ft ~2 min
Transit Clayton at DeMun 396 ft ~2 min
Restaurant Boundary 537 ft ~3 min
Restaurant Basso 581 ft ~3 min
Coffee Starbucks 695 ft ~3 min
Transit Clayton at Skinker 818 ft ~4 min
Restaurant Chinese Express 789 ft ~3 min
Gas station Stevenson's Hi-Pointe Service 863 ft ~4 min
Coffee Haché Herbal Infusions 0.25 mi ~6 min
6350 South Rosebury Avenue, Clayton 63105
We-Su 08:00-14:00
Parking 0.31 mi ~7 min
710 De Mun Avenue, Clayton 63105
Coffee Kaldi's 0.34 mi ~7 min
700 De Mun Avenue, Clayton 63105
Mo-Su 06:30-17:00
Grocery Schnucks 0.38 mi ~8 min
6600 Clayton Road, Clayton 63117
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 |
|---|---|---|
| 2024021246 | MO | Social Worker primary |
This provider holds licence 2024021246 issued in MO. 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 Social Worker covers
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public. NUCC Health Care Provider Taxonomy, code 104100000X
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 | 1003643461 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 18, 2024 |
| Last updated | Sep 18, 2024 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | LMSW |
| Practice address |
9904 CLAYTON RD STE 135 Saint Louis, MO 63124 (314) 222-5830 |
| Other names |
Katherine Baber Former Legal Business Name |
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 | 6 | 4 | 3 | 4 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 3 | 4 | 6 | 4 | 3 |
Sum = 49 · next multiple of 10 = 50 · 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.