JOHN S MILLAR M.D.
NPI 1023092871
Internal Medicine - Critical Care Medicine in Sacramento, CA
About John S Millar M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN S MILLAR M.D. (NPI 1023092871) is an individual critical care medicine provider in Sacramento, California, licensed in California (A70329) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS and is a graduate of Howard University College Of Medicine (1998).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John S Millar M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show John Millar reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Stockton, CA 95210
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 95817 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SACRAMENTO, CA 95817
SACRAMENTO, CA 95817
SACRAMENTO, CA 95817
SACRAMENTO, CA 95817
SACRAMENTO, CA 95817
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Millar's NPI number?
The NPI number for John Millar is 1023092871. It was assigned to this individual provider in the NPPES registry on December 5, 2005.
Where is John Millar located?
John Millar practices at 4150 V St Suite 3400, Sacramento, CA 95817. The listed phone number is (916) 734-3564.
What is John Millar's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is John Millar enrolled in Medicare?
Yes. John Millar is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for John Millar's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Millar reassigns Medicare benefits to Permanente Medical Group Inc (Stockton, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Millar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Millar was last updated on December 14, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John S Millar, M.D. · NPI 1023092871
Critical Care Medicine physician in Sacramento, California. Individual provider, active in the CMS NPPES registry since December 5, 2005.
## Identity
- **NPI:** 1023092871 (Entity type: Individual)
- **Enumerated:** December 5, 2005
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** A70329 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4150 V ST, SUITE 3400, Sacramento, CA 95817-1460
- **Phone:** (916) 734-3564
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Permanente Medical Group Inc (NPI 1548343510, Stockton, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Howard University College Of Medicine, class of 1998
## Record status
- **NPPES last updated:** December 14, 2021
- **Other identifiers:** Other A70329 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1023092871) · Data from the CMS NPPES public registry.