WILLIAM L. TONIDANDEL (MD) – Anesthesiology Physician, NPI 1497771190
Anesthesiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
227 ANESTHESIOLOGY in MT
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Provider Addresses for WILLIAM L. TONIDANDEL (MD)
PO BOX 24102
SEATTLE, WA 981240102
Phone: (503) 372-2740
Fax: (503) 372-2754
Type: Mailing
Saint Peter's Health, 2475, East Broadway Street, Capitol Hill, Helena, Lewis and Clark County, Montana, 59601, United States
HELENA, MT 596014928
Phone: (406) 442-2480
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.
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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: 2004-02-23
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
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 |
|---|---|---|---|---|
| I20040223000938 | I | Anesthesiology | 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 |
|---|---|---|---|---|
| 00811 | Anesthesia for other procedure on large bowel using an endoscope | 20 | 20 | $0 |
| 00812 | Anesthesia for exam of colon using an endoscope | 20 | 20 | $0 |
Insurance plans in this area (ZIP 98124)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | MT | |
| Hospitalist, Internal Medicine | MT | |
| Family Practice | MT | |
| A N E S T H E S I O L O G Y | ID | |
| Physician Assistant | MT | |
| Nurse Practitioner | MT | |
| Certified Registered Nurse Anesthetist (Crna) | TX | |
| Internal Medicine, Hematology/Oncology | MT | |
| Family Practice, Addiction Medicine | MN | |
| - | OK |
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