WILLIAM P KLEIN (MD) – Internal Medicine Physician, NPI 1205834819
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
21,558 INTERNAL MEDICINE in CA
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Provider Addresses for WILLIAM P KLEIN (MD)
Newport Superior Medical Plaza, 1501, Superior Avenue, Newport Heights, Newport Beach, Orange County, California, 92663, United States
#111
NEWPORT BEACH, CA 926633600
Phone: (949) 274-8030
Fax: (949) 642-3127
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 217 Open Payments records for all available years, with a total value of $4,743.
Total Amount is formed as General ($4,743) + Research ($0) + Ownership ($0) = $4,743.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: GlaxoSmithKline, LLC. ($475).
Total Amount
$4,743
General + Research + Ownership
Payments
217
Total payment records
General Amount
$4,743
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| GlaxoSmithKline, LLC. | $475 |
| ABBVIE INC. | $457 |
| Regeneron Healthcare Solutions, Inc. | $347 |
| GENZYME CORPORATION | $240 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $175 |
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: 2004-07-21
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20040721001089 | I | Internal Medicine | CA | 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 | 777 | 257 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 227 | 227 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 222 | 216 | $0 |
| 94010 | Test to measure expiratory airflow and volume | 180 | 131 | $0 |
| 93000 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 174 | 160 | $0 |
Insurance plans in this area (ZIP 92663)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| INTERNAL MEDICINE | CA | 90670 | Pneumococcal vaccine for injection into muscle | 92 | 92 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine, Pulmonary Disease | CA |
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