NPPES file of Aug 9, 2026

Stephen Frederick Knox, M.D.

Neurology Physician · Sacramento, CA

Stephen Frederick Knox, M.D. is a neurology physician with a practice address in Sacramento, California, and NPI 1326062209, issued on Jul 26, 2006. Check the license (California A50875, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1326062209
Name
Stephen Frederick Knox
Credential
M.D.
Primary taxonomy
Neurology Physician 2084N0400X
License number
A50875 CA
Self-reported in NPPES; status is on the state search
Practice location
2800 L St, Sacramento, CA 95816
Phone
(916) 454-6850
Enumerated
Jul 26, 2006
Record last updated
Jul 22, 2015 (not updated in 11 years: call before relying on the address or phone)
Fax
(916) 454-6852
Medicaid ID
00A508750 CA
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest neurology physician records → All 2,339 in California → Look up another NPI →

Also registered at 2800 L St

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

  1. Richard Atkinson, MDNeurology Physician1154344992
  2. William Au, M.D.Neurology Physician1457375321
  3. Richard Axelrod, M.D.Cardiovascular Disease Physician1437147923
  4. Sarah Chan, M.D.Diagnostic Radiology Physician1437353125
  5. Samuel Ciricillo, M.D.Neurological Surgery Physician1841305554
  6. Richard Ericson, MDCardiovascular Disease Physician1649314055

Verify Stephen Frederick Knox in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A50875    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Stephen Frederick Knox among 2,339 neurology physician records in California

Stephen Frederick Knox, M.D. is one of 2,339 neurology physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 4% of them.

  • NPI issued2006 · 4% of these records are older, 59% newer
  • In a Medicare fileNo · 81% of these records are
  • In the CMS Doctors and Clinicians fileNo · 70% of these records are
  • Record last updated2015 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Neurology Physician providers in California

There are 2,339 neurology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 2,339 in California → Every provider in Sacramento → Neurology Physician nationwide →

The 8 neurology physician records with the nearest ZIP codes

  1. Richard Atkinson, MDSacramento, CA 958161154344992
  2. William Au, M.D.Sacramento, CA 958161457375321
  3. John Byer, M.D.Sacramento, CA 958161780690933
  4. Glynnis Calvin, M.D.Sacramento, CA 958161104137678
  5. David Chesak, MD.Sacramento, CA 958161760665475
  6. Edwin Cruz, MDSacramento, CA 958161669556965
  7. Robert Dias, M.D.Sacramento, CA 958161407902612
  8. Billy Hu, M.D.Sacramento, CA 958161063558476

Common questions

What is Stephen Frederick Knox, M.D.'s NPI number?

Stephen Frederick Knox, M.D.'s National Provider Identifier (NPI) is 1326062209, issued on Jul 26, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Stephen Frederick Knox, M.D. located?

The NPPES record lists a practice address at 2800 L St, Sacramento, CA, 95816. Phone: (916) 454-6850. Providers update this record themselves, so call before visiting.

How can I verify Stephen Frederick Knox, M.D.'s license?

NPPES lists California license number A50875, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.