NPPES file of Aug 9, 2026

Rupert J. Rajaratnam, M.D.

Specialist · Lancaster, CA

Rupert J. Rajaratnam, M.D. is a specialist with a practice address in Lancaster, California, and NPI 1922044833, issued on Jun 20, 2006. Check the license (California A83675, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1922044833
Name
Rupert J. Rajaratnam
Credential
M.D.
Primary taxonomy
Specialist 174400000X
License number
A83675 CA
Self-reported in NPPES; status is on the state search
Practice location
43830 10TH St W, Lancaster, CA 93534
Phone
(661) 940-1346
Enumerated
Jun 20, 2006
Record last updated
Oct 7, 2009 (not updated in 17 years: call before relying on the address or phone)
Fax
(661) 940-1362
Medicaid ID
00A836750 CA
Medicare enrollment
Enrolled (PECOS I20050215001137); accepts Medicare assignment
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 specialist records → All 5,749 in California → Look up another NPI →

Also registered at 43830 10TH St W

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

  1. Oluwadamilola AderibigbeNurse Practitioner1063133387
  2. Michael Burr, M.D.Anesthesiology Physician1124053939
  3. Gustavo Casas, DPTPhysical Therapist1033698808
  4. Ilder Cervantes SanchezNurse's Aide1285459727
  5. Yong Chung, M,D,Anesthesiology Physician1881625135
  6. Mary Garcia-Casas, PTPhysical Therapist1700365574

Verify Rupert J. Rajaratnam 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 A83675    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

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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Bills Medicare through one group practice

  1. Anesthesia Partners OF North ValleyLancaster, CA

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

Rupert J. Rajaratnam among 5,749 specialist records in California

Rupert J. Rajaratnam, M.D. is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.

  • NPI issued2006 · 7% of these records are older, 60% newer
  • In a Medicare fileYes · 30% of these records are
  • In the CMS Doctors and Clinicians fileYes · 19% of these records are
  • Graduated1981 · median 1989 among the 1,075 with a school on file
  • Record last updated2009 · 77% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Specialist providers in California

There are 5,749 specialist records in California.

All 5,749 in California → Every provider in Lancaster → Specialist nationwide →

The 8 specialist records with the nearest ZIP codes

  1. Javeed Ahmed, MDLancaster, CA 935341689627051
  2. Pradeep Damle, M.D.Lancaster, CA 935341770563116
  3. Wafaa Farid, MDLancaster, CA 935341811002082
  4. Sameh Gadallah, M.D.Lancaster, CA 935341205897535
  5. Emma Graber, M.D.Lancaster, CA 935341922057918
  6. Syed Hasan, MDLancaster, CA 935341528010998
  7. Pramod Kadambi, M.D.Lancaster, CA 935341114988441
  8. Dennis Latuno, M.D.Lancaster, CA 935341205841087

Common questions

What is Rupert J. Rajaratnam, M.D.'s NPI number?

Rupert J. Rajaratnam, M.D.'s National Provider Identifier (NPI) is 1922044833, issued on Jun 20, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Rupert J. Rajaratnam, M.D. located?

The NPPES record lists a practice address at 43830 10TH St W, Lancaster, CA, 93534. Phone: (661) 940-1346. Providers update this record themselves, so call before visiting.

How can I verify Rupert J. Rajaratnam, M.D.'s license?

NPPES lists California license number A83675, 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. 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.