Ari Marshall, D.O.
Physical Medicine & Rehabilitation Physician · Long Beach, CA
Ari Marshall, D.O. is a physical medicine & rehabilitation physician with a practice address in Long Beach, California, and NPI 1811170491, issued on Dec 6, 2007. Check the license (California 20A9783, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ari Marshall
- Credential
- D.O.
- Primary taxonomy
- Physical Medicine & Rehabilitation Physician 208100000X
- License number
- 20A9783 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3901 E 4TH St, Long Beach, CA 90814
- Phone
- (714) 307-1431
- Enumerated
- Dec 6, 2007
- Record last updated
- Jun 3, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090622000043); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physical medicine & rehabilitation physician records → All 1,549 in California → Look up another NPI →
Also registered at 3901 E 4TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lilah Larrabure, OTR/LOccupational Therapist1821567793
- Cam-Hong LeOccupational Therapist1114879772
- Andrew MarquesPhysical Therapy Assistant1598417388
Verify Ari Marshall in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A9783Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average physical medicine & rehabilitation physician in 2024
133 Medicare Part D claims for 25 beneficiaries, against an average of 727 among the 7,448 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate13 claims
- Tizanidine Hcl13 claims
- Carbidopa-Levodopa11 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.
The MIPS final score for 2023 (Medicare payment program): 0 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Ari Marshall among 1,549 physical medicine & rehabilitation physician records in California
Ari Marshall, D.O. is one of 1,549 physical medicine & rehabilitation physician records with a practice address in California. 59% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 30% of them.
- NPI issued2007 · 30% of these records are older, 59% newer
- In a Medicare fileYes · 59% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2005 · median 2008 among the 786 with a school on file
- Record last updated2013 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208100000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physical Medicine & Rehabilitation Physician providers in California
There are 1,549 physical medicine & rehabilitation physician records in California.
All 1,549 in California → Every provider in Long Beach → Physical Medicine & Rehabilitation Physician nationwide →
The 8 physical medicine & rehabilitation physician records with the nearest ZIP codes
- Ruth Reid-Thornton, M.D.Long Beach, CA 908141770538886
- Hubert Gulak, MDLong Beach, CA 908131619917283
- Penelope KyriaziLong Beach, CA 908151174130637
- Andrew LaiLong Beach, CA 908131770286486
- Iffat Maqbool, M.D.Long Beach, CA 908131568794063
- Teddie NabongLong Beach, CA 908131629288998
- Elizabeth PaulLong Beach, CA 908131770672966
- Jayendra Shah, MDLong Beach, CA 908131730354879
Common questions
What is Ari Marshall, D.O.'s NPI number?
Ari Marshall, D.O.'s National Provider Identifier (NPI) is 1811170491, issued on Dec 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ari Marshall, D.O. located?
The NPPES record lists a practice address at 3901 E 4TH St, Long Beach, CA, 90814. Phone: (714) 307-1431. Providers update this record themselves, so call before visiting.
How can I verify Ari Marshall, D.O.'s license?
NPPES lists California license number 20A9783, 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 Ari Marshall, D.O. prescribe under Medicare Part D?
In 2024, Ari Marshall, D.O. had 133 Medicare Part D claims for 25 beneficiaries; the average among physical medicine & rehabilitation physician prescribers was 727. Part D covers Medicare prescriptions only.
What is Ari Marshall, D.O.'s MIPS final score?
The 2023 MIPS final score is 0 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.
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.