DR. MARK LA SHELL (M.D.) – Allergy Physician, NPI 1205825288
Allergy Physician
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Profile Insights
NPPES metrics only — not quality of care.
94 ALLERGY/IMMUNOLOGY in WA
Provider Addresses for DR. MARK LA SHELL (M.D.)
11511 NE 10TH ST
BELLEVUE, WA 980048578
Phone: (425) 502-3000
Type: Mailing
South 10th Street, Avery North, Bellevue, Sarpy County, Nebraska, 68123, United States
GROUP HEALTH COOPERATIVE
BELLEVUE, WA 98004
Phone: (425) 502-3000
Type: Mailing
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: 2024-09-25
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 |
|---|---|---|---|---|
| I20110923000053 | I | Allergy/Immunology | WA | TBD |
| I20240925000387 | I | Allergy/Immunology | MO | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 98004)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Neuropsychiatry, Neurology | MO | |
| Certified Registered Nurse Anesthetist (Crna) | MO | |
| Diagnostic Radiology | MO | |
| Diagnostic Radiology | MO | |
| Internal Medicine | MO | |
| Family Practice | MO | |
| Neuropsychiatry, Neurology | MO | |
| - | MO | |
| Nurse Practitioner | MO | |
| Nurse Practitioner | MO |
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