GREGORY N JR. NELSON (M.D.) – Orthopaedic Surgery Physician, NPI 1114174265
Orthopaedic Surgery Physician
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Profile Insights
NPPES metrics only — not quality of care.
663 ORTHOPEDIC SURGERY in AZ
Provider Addresses for GREGORY N JR. NELSON (M.D.)
18444 N 25th Ave
Ste 310
Phoenix, AZ 850231266
Phone: (623) 537-5600
Fax: (866) 939-2673
Type: Location
PO BOX 955534
SAINT LOUIS, MO 631955534
Phone:
Type: Mailing
Red Earth Farm CSA drop site, 925, Chestnut Street, Society Hill, Philadelphia, Philadelphia County, Pennsylvania, 19139, United States
5TH FLOOR
PHILADELPHIA, PA 191074216
Phone: (267) 339-3500
Fax: (215) 503-0580
Type: Mailing
18444, North 25th Avenue, Union Hills Corporate Center, Phoenix, Maricopa County, Arizona, 85023, United States
STE 310
PHOENIX, AZ 850231266
Phone: (623) 537-5600
Fax: (866) 939-2673
Type: Location
12349 DE PAUL DR STE 100
BRIDGETON, MO 630442512
Phone: (314) 291-7900
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 52 Open Payments records for all available years, with a total value of $17,792.
Total Amount is formed as General ($17,792) + Research ($0) + Ownership ($0) = $17,792.
Last reported payment date: 2024-12-10 • Largest payer in this snapshot: Zimmer Biomet Holdings, Inc. ($15,206).
Total Amount
$17,792
General + Research + Ownership
Payments
52
Total payment records
General Amount
$17,792
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-10
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Zimmer Biomet Holdings, Inc. | $15,206 |
| Smith+Nephew, Inc. | $2,109 |
| Stryker Corporation | $367 |
| HERAEUS MEDICAL, LLC. | $57 |
| Elite Orthopedics, LLC | $53 |
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: 2017-03-31
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 |
|---|---|---|---|---|
| I20170331000739 | I | Orthopedic Surgery | MO | 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 |
|---|---|---|---|---|
| 20610 | Aspiration and/or injection of fluid from large joint | 87 | 66 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 82 | 71 | $0 |
| 73030 | X-ray of shoulder, minimum of 2 views | 37 | 28 | $0 |
| 73502 | X-ray of hip, 2-3 views | 36 | 31 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 35 | 35 | $0 |
Insurance plans in this area (ZIP 85023)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| ORTHOPEDIC SURGERY | AZ | 20610 | Aspiration and/or injection of large joint or joint capsule | 178 | 148 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Orthopedic Surgery | MO | |
| Orthopedic Surgery | MO | |
| - | MO | |
| Orthopedic Surgery | MO | |
| - | MO | |
| Orthopedic Surgery | MO | |
| Nurse Practitioner | MO | |
| Physician Assistant | MO | |
| Physician Assistant | IL | |
| Nurse Practitioner | IL |
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