ALEXANDER MICHAEL MASON (MD) – Neurological Surgery Physician, NPI 1275758039
Neurological Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
756 GENERAL SURGERY in CO
Provider Addresses for ALEXANDER MICHAEL MASON (MD)
4743 ARAPAHOE VE
STE 202
BOULDER, CO 80303
Phone: (303) 938-5700
Fax: (303) 998-0007
Type: Location
4743 Arapahoe Ve
Ste 202
Boulder, CO 80303
Phone: (303) 938-5700
Fax: (303) 998-0007
Type: Location
640 JACKSON ST
SAINT PAUL, MN 551012502
Phone: (651) 495-6600
Fax: (651) 254-3123
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: 2026-02-02
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 4 Medicare enrollment records; no due dates published yet.
Enrollment records
4
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 |
|---|---|---|---|---|
| I20070828000214 | I | Neurosurgery | GA | TBD |
| I20081007000492 | I | Neurosurgery | CO | TBD |
| I20150914003035 | I | Neurosurgery | MN | TBD |
| I20260202000256 | I | General Surgery | SC | 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 80303)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| O B S T E T R I C S/ G Y N E C O L O G Y | CO | |
| - | CA | |
| - | CO | |
| Physician Assistant | CO | |
| Hospitalist, Family Practice | CO | |
| - | CO | |
| Interventional Cardiology, Cardiovascular Disease (Cardiology), Internal Medicine | CO | |
| O B S T E T R I C S/ G Y N E C O L O G Y | CO | |
| - | CO | |
| - | CO |
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