Data from the NPPES registry. May not reflect recent changes — verify at nppes.cms.hhs.gov.
MARK JOHN SCHALK, RN
Active Sole ProprietorMARK JOHN SCHALK, RN is a Registered Nurse healthcare provider located in DEL CITY, Oklahoma. NPI 1225981749 is currently active in the NPPES registry. Verify at CMS.
Registered Nurse · DEL CITY, OK
Registration Details
- NPI Number
- 1225981749
- Provider Type
- Individual
- Gender
- Male
- NPI Issued
- Feb 16, 2026 (0.30919662721927 yrs)
- Last Updated
- Feb 16, 2026
- License
-
R0079023 (OK)
- Sole Proprietor
- Yes
Practice Information
- Address
-
1900 S SUNNYLANE RDDEL CITY, OK, 731153102Browse OK providers · Browse ZIP 73115
- Phone
- 4056775777
- Primary Specialty
-
Registered Nurse
163W00000X
Other Registered Nurse Providers in DEL CITY, OK
| Name | Credential | NPI |
|---|---|---|
| DANA A FERRELL | — | 1295384121 |
| MRS. KATHERINE M MORGAN | — | 1285245258 |
| KOURTNEY ROBERSON | — | 1275255770 |
| MS. MARCI ANNE WILSON | RN | 1588446538 |
| HEATHER NICOLE FAHR | — | 1154202455 |
| KELLIE M CARTER | RN | 1336090356 |
Data sourced from the NPPES National Provider Identifier registry. This information is for informational purposes only and is not a substitute for verifying credentials with the appropriate licensing authority. For official verification, use the NPPES NPI Registry or the relevant state medical board.