NPPES file of Aug 9, 2026

Patrick S. Chang, MD

Internal Medicine Physician · Mather, CA

Patrick S. Chang, MD is an internal medicine physician with a practice address in Mather, California, and NPI 1861467656, issued on Feb 23, 2006. Check the license 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
1861467656
Name
Patrick S. Chang
Credential
MD
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
21908 AZ
Self-reported in NPPES; status is on the state search
Practice location
10535 Hospital Way, Mather, CA 95655
Phone
(916) 843-7000
Enumerated
Feb 23, 2006
Record last updated
Dec 26, 2025
Medicaid ID
346967 AZ
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 internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 10535 Hospital Way

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

  1. Stephen Aglubat, M.D.Internal Medicine Physician1497070031
  2. Aliya Akbar, M.D.Family Medicine Physician1467454934
  3. Anthony Albanese, M.D.Addiction Medicine (Internal Medicine) Physician1215910187
  4. Sarah AliPharmacist1851871503
  5. Shelby Alley, DPMFoot & Ankle Surgery Podiatrist1588928790
  6. Chibuzo Anyama, APRN PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1841059912

Verify Patrick S. Chang in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of CaliforniaCheck 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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Patrick S. Chang among 17,696 internal medicine physician records in California

Patrick S. Chang, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.

  • NPI issued2006 · 5% of these records are older, 56% newer
  • In a Medicare fileNo · 79% of these records are
  • In the CMS Doctors and Clinicians fileNo · 63% of these records are
  • Record last updated2025 · 61% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

26 internal medicine physician records list a practice address in Mather

They are 26 of the 398 NPPES records with a practice address in Mather, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 17,696 in California → Every provider in Mather → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Sheldon Ball, MDMather, CA 956551689646275
  2. Stephen Drogin, M.D.Carmichael Ca, CA 956551891710315
  3. Philip Eulie, M.D.Mather, CA 956551669455762
  4. Clifford Fisher, MDMather, CA 956551063495687
  5. Dorothea Hoover, MDMather, CA 956551609802800
  6. Rajasekar Jagadeesan, M.D.Mather, CA 956551790967586
  7. Jaeho Lee, M.D.Mather, CA 956551578547048
  8. Akshay Manek, M. D.Mather, CA 956551568569465

Common questions

What is Patrick S. Chang, MD's NPI number?

Patrick S. Chang, MD's National Provider Identifier (NPI) is 1861467656, issued on Feb 23, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Patrick S. Chang, MD located?

The NPPES record lists a practice address at 10535 Hospital Way, Mather, CA, 95655. Phone: (916) 843-7000. Providers update this record themselves, so call before visiting.

How can I verify Patrick S. Chang, MD's license?

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.