MELISSA DAWN GREGORIUS (CRNA) – Certified Registered Nurse Anesthetist, NPI 1942440359
Certified Registered Nurse Anesthetist
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Profile Insights
NPPES metrics only — not quality of care.
2,456 CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) in CA
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Provider Addresses for MELISSA DAWN GREGORIUS (CRNA)
400, Pepper Avenue, West Colton, Colton, San Bernardino County, California, 92324, United States
COLTON, CA 923241801
Phone: (909) 362-2901
Type: Mailing
915, La Flora Drive, Redlands, San Bernardino County, California, 92373, United States
REDLANDS, CA 92373
Phone: (909) 556-0325
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2023-02-14
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20091217000225 | I | Certified Registered Nurse Anesthetist (Crna) | CA | TBD |
| I20230214002342 | I | Certified Registered Nurse Anesthetist (Crna) | MT | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 00142 | Anesthesia for lens surgery | 101 | 100 | $0 |
Insurance plans in this area (ZIP 92324)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| A N E S T H E S I O L O G Y | OR | |
| - | CA | |
| A N E S T H E S I O L O G Y | CA | |
| A N E S T H E S I O L O G Y | CA | |
| - | CA | |
| - | CA | |
| A N E S T H E S I O L O G Y | CA | |
| Anesthesiology, Interventional Pain Management | CA | |
| A N E S T H E S I O L O G Y | CA | |
| A N E S T H E S I O L O G Y | CA |
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