WILLIAM NASSOUR (MD) – Internal Medicine Physician, NPI 1104131820
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 WILLIAM NASSOUR (MD)
PO BOX 17779
PHOENIX, AZ 850110779
Phone: (602) 374-7522
Fax: (602) 237-6997
Type: Mailing
4524 N MARYVALE PKWY STE 140
PHOENIX, AZ 850311730
Phone: (602) 439-6839
Fax: (602) 439-7027
Type: Location
11295 N 99th Ave Apt 5-122
Peoria, AZ 853455490
Phone: (623) 295-1190
Fax: (602) 429-8595
Type: Location
22922 N 40th Pl
Phoenix, AZ 850508742
Phone: (623) 295-1109
Fax: (602) 429-8595
Type: Location
13555 WEST MCDOWELL RD.
STE. 205
GOODYEAR, AZ 853952626
Phone: (623) 295-1190
Fax: (602) 429-8595
Type: Mailing
13555 W MCDOWELL RD STE 205
GOODYEAR, AZ 853952626
Phone: (623) 295-1190
Fax: (602) 429-8595
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 50 Open Payments records for all available years, with a total value of $1,069.
Total Amount is formed as General ($1,069) + Research ($0) + Ownership ($0) = $1,069.
Last reported payment date: 2024-12-06 • Largest payer in this snapshot: Teva Pharmaceuticals USA, Inc. ($164).
Total Amount
$1,069
General + Research + Ownership
Payments
50
Total payment records
General Amount
$1,069
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-06
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Teva Pharmaceuticals USA, Inc. | $164 |
| UCB, Inc. | $157 |
| Intuitive Surgical, Inc. | $99 |
| Abbott Laboratories | $87 |
| Lundbeck LLC | $60 |
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: 2013-11-13
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 |
|---|---|---|---|---|
| I20131113002100 | 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 |
|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 378 | 121 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 132 | 82 | $0 |
| 99309 | Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 90 | 65 | $0 |
| 99308 | Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes | 77 | 56 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 36 | 23 | $0 |
Insurance plans in this area (ZIP 85011)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | AZ | |
| Nurse Practitioner | OK | |
| Nurse Practitioner | AZ | |
| Nurse Practitioner | AZ | |
| Internal Medicine | AZ | |
| Nurse Practitioner | AZ | |
| Internal Medicine, Hospitalist | FL | |
| Nurse Practitioner | AZ | |
| Internal Medicine | AR | |
| Nurse Practitioner | MS |
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