NPPES file of Aug 9, 2026

Matthew Altheide, PA-C

Physician Assistant · Riverside, CA

Matthew Altheide, PA-C is a physician assistant with a practice address in Riverside, California, and NPI 1659130490, issued on Mar 14, 2024. Check the license (California PA64114, as entered in NPPES) with the California board that licenses this profession; 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
1659130490
Name
Matthew Altheide
Credential
PA-C
Primary taxonomy
Physician Assistant 363A00000X
License numbers
PA64114 CA
E018059 CA
Self-reported in NPPES; status is on the state search
Practice location
4300 Central Ave, Riverside, CA 92506
Phone
(951) 222-2208
Enumerated
Mar 14, 2024
Record last updated
Nov 30, 2025
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 physician assistant records → All 14,451 in California → Look up another NPI →

Also registered at 4300 Central Ave

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

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  2. Jivaun Daley, PTAPhysical Therapy Assistant1124904222
  3. Bryan Hunsaker, PTAPhysical Therapy Assistant1235002023
  4. Christie LauPhysical Therapist1891395695
  5. Jarrod McCann, PTAPhysical Therapy Assistant1295656056
  6. William Montgomery, MDOccupational Medicine Physician1033139266

Verify Matthew Altheide in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license PA64114    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
Find the California license search

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Matthew Altheide among 14,451 physician assistant records in California

Matthew Altheide, PA-C is one of 14,451 physician assistant records with a practice address in California. 75% 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 2024, is newer than 87% of them.

  • NPI issued2024 · 87% of these records are older, 7% newer
  • In a Medicare fileNo · 75% of these records are
  • In the CMS Doctors and Clinicians fileNo · 50% of these records are
  • Record last updated2025 · 40% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

164 physician assistant records list a practice address in Riverside

They are 164 of the 13,893 NPPES records with a practice address in Riverside, and 14,451 physician assistant records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 14,451 in California → Every provider in Riverside → Physician Assistant nationwide →

The 8 physician assistant records with the nearest ZIP codes

  1. Harrier Cagatay, PACRiverside, CA 925061508916461
  2. Jennifer Estrada, PARiverside, CA 925061710982954
  3. Karen Genco, PARiverside, CA 925061770894420
  4. Chelsea HardestyRiverside, CA 925061396108189
  5. Andrew Harris, P.A.-CRiverside, CA 925061649419482
  6. Sofia Henderson, PA-CRiverside, CA 925061558784645
  7. Dana LlamasRiverside, CA 925061467817783
  8. Kaneal McShane, PA-CRiverside, CA 925061619307659

Common questions

What is Matthew Altheide, PA-C's NPI number?

Matthew Altheide, PA-C's National Provider Identifier (NPI) is 1659130490, issued on Mar 14, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Matthew Altheide, PA-C located?

The NPPES record lists a practice address at 4300 Central Ave, Riverside, CA, 92506. Phone: (951) 222-2208. Providers update this record themselves, so call before visiting.

How can I verify Matthew Altheide, PA-C's license?

NPPES lists California license number PA64114, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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. 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.