DR. WALTER JOHN NIERI (M.D.) – Geriatric Medicine (Internal Medicine) Physician, NPI 1265488258
Geriatric Medicine (Internal Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
3,585 INTERNAL MEDICINE in AZ
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Provider Addresses for DR. WALTER JOHN NIERI (M.D.)
6510, North 27th Street, Camelback East, Phoenix, Maricopa County, Arizona, 85016, United States
PHOENIX, AZ 850168943
Phone: (902) 885-1988
Fax: (602) 952-9750
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $161.
Total Amount is formed as General ($161) + Research ($0) + Ownership ($0) = $161.
Last reported payment date: 2024-10-30 • Largest payer in this snapshot: SCPHARMACEUTICALS INC. ($125).
Total Amount
$161
General + Research + Ownership
Payments
2
Total payment records
General Amount
$161
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-30
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| SCPHARMACEUTICALS INC. | $125 |
| Lilly USA, LLC | $36 |
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: 2007-08-14
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 |
|---|---|---|---|---|
| I20070814000568 | I | Internal 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 |
|---|---|---|---|---|
| 99349 | Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes | 256 | 40 | $0 |
| 99345 | Residence visit for new patient with high level of medical decision making, per day, if using time, at least 75 minutes | 11 | 11 | $0 |
Insurance plans in this area (ZIP 85016)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | AZ | |
| Psychiatry, Internal Medicine | AZ | |
| Internal Medicine, Pulmonary Disease, Critical Care (Intensivists) | AZ | |
| Diagnostic Radiology | AZ | |
| Internal Medicine, Hospitalist | AZ | |
| P S Y C H I A T R Y | AZ | |
| Internal Medicine | AZ | |
| H O S P I T A L I S T | NM | |
| - | AZ | |
| Internal Medicine | AZ |
Reviews
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