JOHN FREDERICK MACMILLAN (MD) – Internal Medicine Physician, NPI 1568449015
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
21,558 INTERNAL MEDICINE in CA
Loading map...
Provider Addresses for JOHN FREDERICK MACMILLAN (MD)
4150, V Street, Sacramento, Sacramento County, California, 95817, United States
SUITE 3400 UNIVERSITY OF CALIFONIA DAVIS SCHOOL OF MEDI
SACRAMENTO, CA 958171460
Phone: (916) 794-3564
Fax: (916) 734-7924
Type: Mailing
University of California, Davis Medical Center, 2315, Stockton Boulevard, Sacramento, Sacramento County, California, 95817, United States
MAIN HOSPITAL UNIVERSITY OF CALIFORNIA DAVIS HEALTH SYS
SACRAMENTO, CA 958172201
Phone: (918) 734-7508
Fax: (918) 734-4810
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $122.
Total Amount is formed as General ($122) + Research ($0) + Ownership ($0) = $122.
Last reported payment date: 2024-07-08 • Largest payer in this snapshot: ABBVIE INC. ($122).
Total Amount
$122
General + Research + Ownership
Payments
1
Total payment records
General Amount
$122
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-07-08
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $122 |
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: 2004-07-15
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 |
|---|---|---|---|---|
| I20040715000370 | 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 |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 206 | 63 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 74 | 38 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 44 | 44 | $0 |
| 99238 | Hospital discharge day management, 30 minutes or less | 42 | 41 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 29 | 29 | $0 |
Insurance plans in this area (ZIP 95817)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | PA | |
| - | CA | |
| Certified Registered Nurse Anesthetist (Crna) | CA | |
| Physician Assistant | IL | |
| Internal Medicine, Hospice/Palliative Care | CA | |
| Cardiovascular Disease (Cardiology) | CA | |
| - | CA | |
| - | CA | |
| A N E S T H E S I O L O G Y | WA | |
| Nurse Practitioner | CA |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.