NPPES file of Aug 9, 2026

John S. Millar, M.D.

Critical Care Medicine (Internal Medicine) Physician · Sacramento, CA

John S. Millar, M.D. is a critical care medicine (internal medicine) physician with a practice address in Sacramento, California, and NPI 1023092871, issued on Dec 5, 2005. Check the license (California A70329, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1023092871
Name
John S. Millar
Credential
M.D.
Primary taxonomy
Critical Care Medicine (Internal Medicine) Physician 207RC0200X
License number
A70329 CA
Self-reported in NPPES; status is on the state search
Practice location
4150 V St, Sacramento, CA 95817
Phone
(916) 734-3564
Enumerated
Dec 5, 2005
Record last updated
Dec 14, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20040525001649); accepts Medicare assignment
Medical or professional school
Howard University College Of Medicine, 1998
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest critical care medicine (internal medicine) physician records → All 723 in California → Look up another NPI →

Also registered at 4150 V St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Lia Angela Africa, M.D.Internal Medicine Physician1164849360
  2. Jillian Ahrens, M.D.Internal Medicine Physician1225307457
  3. Amar Al-Juburi, M.D.Gastroenterology Physician1821041229
  4. Waqar Ali, M.D.Internal Medicine Physician1891112090
  5. Amir Amini, M.D.Anesthesiology Physician1164699302
  6. Shubha Ananthakrishnan, MDNephrology Physician1275633869

Verify John S. Millar in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A70329    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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2% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024

683 Medicare Part D claims for 195 beneficiaries, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D. 12 claims were for opioids.

  1. John Millar683
  2. Specialty average696

Most prescribed

  1. Furosemide33 claims
  2. Atorvastatin Calcium32 claims
  3. Pantoprazole Sodium32 claims
  4. Cefpodoxime Proxetil29 claims
  5. Metoprolol Tartrate26 claims
  6. Doxycycline Monohydrate24 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Bills Medicare through one group practice

  1. Permanente Medical Group IncVacaville, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

John S. Millar among 723 critical care medicine (internal medicine) physician records in California

John S. Millar, M.D. is one of 723 critical care medicine (internal medicine) physician records with a practice address in California. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 94% newer
  • In a Medicare fileYes · 87% of these records are
  • In the CMS Doctors and Clinicians fileYes · 77% of these records are
  • Graduated1998 · median 2005 among the 559 with a school on file
  • Record last updated2021 · 50% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Critical Care Medicine (Internal Medicine) Physician providers in California

There are 723 critical care medicine (internal medicine) physician records in California.

All 723 in California → Every provider in Sacramento → Critical Care Medicine (Internal Medicine) Physician nationwide →

The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes

  1. Jason Adams, M.D.Sacramento, CA 958171134367568
  2. Timothy Albertson, MD, PHD, MPHSacramento, CA 958171184607236
  3. Katyayini Aribindi, M.D.Sacramento, CA 958171902338122
  4. Hugh Black, MDSacramento, CA 958171376523498
  5. Andrew Chan, MBSacramento, CA 958171114902426
  6. Nicholas Kenyon, M.D.Sacramento, CA 958171689657512
  7. Reika MiyokawaSacramento, CA 958171619408333
  8. Susan Murin, MDSacramento, CA 958171063495935

Common questions

What is John S. Millar, M.D.'s NPI number?

John S. Millar, M.D.'s National Provider Identifier (NPI) is 1023092871, issued on Dec 5, 2005. An NPI identifies a provider in billing; it is not a license.

Where is John S. Millar, M.D. located?

The NPPES record lists a practice address at 4150 V St, Sacramento, CA, 95817. Phone: (916) 734-3564. Providers update this record themselves, so call before visiting.

How can I verify John S. Millar, M.D.'s license?

NPPES lists California license number A70329, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does John S. Millar, M.D. prescribe under Medicare Part D?

In 2024, John S. Millar, M.D. had 683 Medicare Part D claims for 195 beneficiaries; the average among critical care medicine (internal medicine) physician prescribers was 696. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.