MICHAEL S. GREINER (NP-C, D.C.) – Nurse Practitioner, NPI 1942452453
Nurse Practitioner
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
16,360 NURSE PRACTITIONER in CA
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Provider Addresses for MICHAEL S. GREINER (NP-C, D.C.)
1424 MANHATTAN AVE APT 3
HERMOSA BEACH, CA 902543600
Phone: (586) 243-0303
Fax: (310) 374-6626
Type: Mailing
520, North Prospect Avenue, Redondo Beach, Los Angeles County, California, 90277, United States
STE # 201
REDONDO BEACH, CA 902773041
Phone: (310) 374-9710
Fax: (310) 374-6626
Type: Location
2243 E 12 MILE RD
WARREN, MI 480925644
Phone: (586) 573-8100
Fax: (586) 573-8101
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 4 Open Payments records for all available years, with a total value of $180.
Total Amount is formed as General ($180) + Research ($0) + Ownership ($0) = $180.
Last reported payment date: 2024-12-17 • Largest payer in this snapshot: Abbott Laboratories ($80).
Total Amount
$180
General + Research + Ownership
Payments
4
Total payment records
General Amount
$180
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-17
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Abbott Laboratories | $80 |
| SI-BONE, INC. | $66 |
| Nevro Corp. | $34 |
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: 2025-06-02
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20110519000307 | I | Chiropractic | MI | TBD |
| I20250602003471 | I | Nurse Practitioner | MI | 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 |
|---|---|---|---|---|
| 98941 | Chiropractic manipulative treatment, 3-4 spinal regions | 259 | 51 | $0 |
Insurance plans in this area (ZIP 90254)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| CHIROPRACTIC | CA | 98940 | Chiropractic manipulative treatment, 1-2 spinal regions | 220 | 43 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| C H I R O P R A C T I C | MI | |
| Certified Registered Nurse Anesthetist (Crna) | MI | |
| Physical Therapist In Private Practice | MI | |
| Nurse Practitioner | MI | |
| Interventional Radiology, Diagnostic Radiology | MI | |
| Physical Medicine And Rehabilitation, Interventional Pain Management, Pain Management | MI | |
| C H I R O P R A C T I C | MI | |
| C H I R O P R A C T I C | MI |
Reviews
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