MAXWELL JOHN MATSON (M.D.) – Internal Medicine Physician, NPI 1669867719
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
3,585 INTERNAL MEDICINE in AZ
Provider Addresses for MAXWELL JOHN MATSON (M.D.)
450 S WILLARD ST
COTTONWOOD, AZ 86326
Phone: (928) 634-5551
Fax: (928) 634-5604
Type: Location
1200 N BEAVER ST
FLAGSTAFF, AZ 860013118
Phone: (928) 213-6235
Type: Mailing
340 S WILLARD ST
COTTONWOOD, AZ 863264126
Phone: (928) 639-6025
Fax: (928) 634-5604
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: 2025-10-27
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 |
|---|---|---|---|---|
| I20251027000913 | I | Internal Medicine | TX | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 397 | 279 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 284 | 217 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 126 | 110 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 102 | 102 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 44 | 39 | $0 |
Insurance plans in this area (ZIP 86326)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Clinical Psychologist | WY | |
| Nurse Practitioner | UT | |
| Nurse Practitioner | SD | |
| O P T O M E T R Y | MT | |
| Internal Medicine | CO | |
| Nurse Practitioner | WY | |
| Nurse Practitioner | UT | |
| Family Practice | WY | |
| Nurse Practitioner | LA | |
| Family Practice | WY |
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