DR. JOHN DAWSON MASON (MD) – Emergency Medicine Physician, NPI 1023090099
Emergency Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,181 EMERGENCY MEDICINE in AZ
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Provider Addresses for DR. JOHN DAWSON MASON (MD)
4619, East Calle Tuberia, Arcadia, Camelback East, Phoenix, Maricopa County, Arizona, 85018, United States
PHOENIX, AZ 850182910
Phone: (480) 206-4086
Type: Mailing
Tempe St. Luke Hospital, 1500, South Mill Avenue, Tempe Junction, Tempe, Maricopa County, Arizona, 85281, United States
TEMPE, AZ 852816699
Phone: (480) 784-5533
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: 2004-02-23
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20040223000552 | I | Emergency Medicine | AZ | 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 |
|---|---|---|---|---|
| 99284 | Emergency department visit with moderate level of medical decision making | 25 | 24 | $0 |
Insurance plans in this area (ZIP 85018)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Emergency Medicine | AZ | |
| Family Practice | AZ | |
| Emergency Medicine | AZ | |
| Emergency Medicine | FL | |
| Emergency Medicine | AZ | |
| Family Practice, Emergency Medicine | AZ | |
| Emergency Medicine | CA | |
| Emergency Medicine | AZ | |
| Emergency Medicine | AZ | |
| Emergency Medicine | IL |
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