NPPES file of Aug 9, 2026

Joshua Michael Ian Davidson, M.D., M.P.H.

Allergy & Immunology Physician · Redondo Beach, CA

Joshua Michael Ian Davidson, M.D., M.P.H. is an allergy & immunology physician with a practice address in Redondo Beach, California, and NPI 1144343146, issued on Apr 6, 2007. Check the license (California A88990, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1144343146
Name
Joshua Michael Ian Davidson
Credential
M.D., M.P.H.
Primary taxonomy
Allergy & Immunology Physician 207K00000X
License number
A88990 CA
Self-reported in NPPES; status is on the state search
Practice location
502 Torrance Blvd, Redondo Beach, CA 90277
Phone
(310) 792-8393
Enumerated
Apr 6, 2007
Record last updated
Dec 12, 2025
Medicare enrollment
Enrolled (PECOS I20090912000139); accepts Medicare assignment
Medical or professional school
University Of California, Geffen School Of Medicine, 2003
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest allergy & immunology physician records → All 444 in California → Look up another NPI →

Also registered at 502 Torrance Blvd

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

  1. Nneka Akubuilo, M.D.Family Medicine Physician1407877442
  2. Lynn Armstrong, FNP-BCFamily Nurse Practitioner1992032940
  3. Eric Arosemena, M.DFamily Medicine Physician1962479337
  4. Jennifer Auf Der Springe, M.D., M.P.H.Family Medicine Physician1760865208
  5. Diana Chang, M.D.Family Medicine Physician1235105198
  6. Kanti Charugundla, PA-CPhysician Assistant1326153990

Verify Joshua Michael Ian Davidson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A88990    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

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17% more Medicare Part D claims than the average allergy & immunology physician in 2024

869 Medicare Part D claims for 308 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D.

  1. Joshua Davidson869
  2. Specialty average741

Most prescribed

  1. Levocetirizine Dihydrochloride69 claims
  2. Breo Ellipta47 claims
  3. Triamcinolone Acetonide45 claims
  4. Atorvastatin Calcium43 claims
  5. Azelastine Hcl33 claims
  6. Ipratropium Bromide32 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.

Bills Medicare through 2 group practices

  1. Healthcare Partners Affiliates Medical GroupLong Beach, CA
  2. Monica Perlman MD IncSan Diego, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Joshua Michael Ian Davidson among 444 allergy & immunology physician records in California

Joshua Michael Ian Davidson, M.D., M.P.H. is one of 444 allergy & immunology 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. Its NPI, issued in 2007, is newer than 47% of them.

  • NPI issued2007 · 47% of these records are older, 38% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 63% of these records are
  • Graduated2003 · median 2004 among the 281 with a school on file
  • Record last updated2025 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Allergy & Immunology Physician providers in California

There are 444 allergy & immunology physician records in California.

All 444 in California → Every provider in Redondo Beach → Allergy & Immunology Physician nationwide →

The 8 allergy & immunology physician records with the nearest ZIP codes

  1. Madhu Berman, M.D.Rancho Palos Verdes, CA 902751215959077
  2. Margaret J. Goldenhersh, M.D.Pacific Palisades, CA 902721669633640
  3. Yasamin Ghiasi, MDBeverly Hills, CA 902111316409584
  4. Alan Khadavi, MDBeverly Hills, CA 902111841220621
  5. Terrie Ahn, MDSanta Monica, CA 904041093166795
  6. Lorraine Anderson, MDSanta Monica, CA 904041013209568
  7. Sanny Chan, M.D., PH.D.Santa Monica, CA 904041043449788
  8. Aaron Chin, MDSanta Monica, CA 904041487116638

Common questions

What is Joshua Michael Ian Davidson, M.D., M.P.H.'s NPI number?

Joshua Michael Ian Davidson, M.D., M.P.H.'s National Provider Identifier (NPI) is 1144343146, issued on Apr 6, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Joshua Michael Ian Davidson, M.D., M.P.H. located?

The NPPES record lists a practice address at 502 Torrance Blvd, Redondo Beach, CA, 90277. Phone: (310) 792-8393. Providers update this record themselves, so call before visiting.

How can I verify Joshua Michael Ian Davidson, M.D., M.P.H.'s license?

NPPES lists California license number A88990, 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 Joshua Michael Ian Davidson, M.D., M.P.H. prescribe under Medicare Part D?

In 2024, Joshua Michael Ian Davidson, M.D., M.P.H. had 869 Medicare Part D claims for 308 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. 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.