DR. JOHN PETER BARON (D.O.) – Nephrology Physician, NPI 1861471591
Nephrology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,404 NEPHROLOGY in CA
Provider Addresses for DR. JOHN PETER BARON (D.O.)
2301 Circadian Way Ste A
Santa Rosa, CA 954075457
Phone: (707) 526-2027
Fax: (707) 526-2096
Type: Location
Bldg 405
Kunsan AB, ROK
APO, AE 96264
Phone: (315) 470-0409
Type: Location
101, Bodin Circle, Fairfield, Solano County, California, 94535, United States
TRAVIS AFB, CA 945351809
Phone: (707) 423-3369
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 90 Open Payments records for all available years, with a total value of $4,987.
Total Amount is formed as General ($4,987) + Research ($0) + Ownership ($0) = $4,987.
Last reported payment date: 2024-11-21 • Largest payer in this snapshot: Bayer Healthcare Pharmaceuticals Inc. ($3,514).
Total Amount
$4,987
General + Research + Ownership
Payments
90
Total payment records
General Amount
$4,987
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-21
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2008-10-20
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 |
|---|---|---|---|---|
| I20081020000485 | I | Nephrology | 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 |
|---|---|---|---|---|
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 290 | 174 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 132 | 103 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 126 | 126 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 102 | 45 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 97 | 32 | $0 |
Insurance plans in this area (ZIP 95407)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CA | |
| Nephrology, Internal Medicine | CA | |
| Nephrology, Internal Medicine | CA | |
| Registered Dietitian Or Nutrition Professional | CA | |
| Internal Medicine, Nephrology | CA | |
| - | CA | |
| Nephrology, Internal Medicine | CA | |
| Nephrology, Internal Medicine | CA | |
| - | CA | |
| Physician Assistant | CA |
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