NPPES file of Aug 9, 2026

Marshall A. Kahn, M.D.

Family Medicine Physician · Downey, CA

Marshall A. Kahn, M.D. is a family medicine physician with a practice address in Downey, California, and NPI 1699912451, issued on Jan 15, 2009. Check the license (California A28041, 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
1699912451
Name
Marshall A. Kahn
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
A28041 CA
Self-reported in NPPES; status is on the state search
Practice location
9040 Telegraph RD, Downey, CA 90240
Phone
(562) 927-0033
Enumerated
Jan 15, 2009
Record last updated
Jul 26, 2026
Fax
(562) 231-1905
Medicaid ID
00A280410 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 family medicine physician records → All 17,133 in California → Look up another NPI →

Also registered at 9040 Telegraph RD

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

  1. Gary Marsh, M.D.Cardiovascular Disease Physician1639116296
  2. Enrique Robles, M.D.Family Medicine Physician1932155157
  3. John Shaib, MDNephrology Physician1851339048

Verify Marshall A. Kahn in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A28041    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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Marshall A. Kahn among 17,133 family medicine physician records in California

Marshall A. Kahn, M.D. is one of 17,133 family medicine 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 2009, is newer than 58% of them.

  • NPI issued2009 · 58% of these records are older, 40% newer
  • In a Medicare fileNo · 81% of these records are
  • In the CMS Doctors and Clinicians fileNo · 62% of these records are
  • Record last updated2026 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

65 family medicine physician records list a practice address in Downey

They are 65 of the 3,607 NPPES records with a practice address in Downey, and 17,133 family medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 17,133 in California → Every provider in Downey → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. Gregory Castillo, MD.Downey, CA 902401700839917
  2. Gustavo Estrella, MDDowney, CA 902401538208236
  3. Cristina Garcia, MDDowney, CA 902401326391004
  4. Susan Kawakami, D.O.Downey, CA 902401740212851
  5. Marilou Lucero, M.D.Downey, CA 902401861523052
  6. Anar Patel-Joshi, MDDowney, CA 902401710509500
  7. Enrique Robles, M.D.Downey, CA 902401932155157
  8. Martha Rodriguez, M.D.Downey, CA 902401912993973

Common questions

What is Marshall A. Kahn, M.D.'s NPI number?

Marshall A. Kahn, M.D.'s National Provider Identifier (NPI) is 1699912451, issued on Jan 15, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Marshall A. Kahn, M.D. located?

The NPPES record lists a practice address at 9040 Telegraph RD, Downey, CA, 90240. Phone: (562) 927-0033. Providers update this record themselves, so call before visiting.

How can I verify Marshall A. Kahn, M.D.'s license?

NPPES lists California license number A28041, 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.