MR. ARTHUR TRAPP CHALMERS (MPH, PA-C) – Physician Assistant, NPI 1013465715
Physician Assistant
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for MR. ARTHUR TRAPP CHALMERS (MPH, PA-C)
10423, Old Placerville Road, Mather, Rancho Cordova, Sacramento County, California, 95827, United States
SACRAMENTO, CA 958272540
Phone: (916) 569-8600
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)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2018-02-21
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 |
|---|---|---|---|---|
| I20180221000400 | I | Physician Assistant | 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 |
|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 386 | 92 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 59 | 53 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 55 | 52 | $0 |
Insurance plans in this area (ZIP 95827)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| P S Y C H I A T R Y | CA | |
| P S Y C H I A T R Y | CA | |
| P S Y C H I A T R Y | CA | |
| P S Y C H I A T R Y | CA | |
| Nurse Practitioner | CA | |
| - | CA | |
| P S Y C H I A T R Y | CA | |
| P S Y C H I A T R Y | CA | |
| - | CA | |
| P S Y C H I A T R Y | CA |
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