NPPES file of Aug 9, 2026

Ajay K. Masih, M.D.

Pain Medicine (Physical Medicine & Rehabilitation) Physician · Los Angeles, CA

Ajay K. Masih, M.D. is a pain medicine (physical medicine & rehabilitation) physician with a practice address in Los Angeles, California, and NPI 1013072537, issued on Dec 26, 2006. Check the license (California A64040, 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
1013072537
Name
Ajay K. Masih
Credential
M.D.
Primary taxonomy
Pain Medicine (Physical Medicine & Rehabilitation) Physician 2081P2900X
License number
A64040 CA
Self-reported in NPPES; status is on the state search
Practice location
2080 Century Park East, Los Angeles, CA 90067
Phone
(310) 553-0123
Enumerated
Dec 26, 2006
Record last updated
Sep 5, 2023
Medicare enrollment
Enrolled (PECOS I20040427000494); accepts Medicare assignment
Medical or professional school
Loyola University Of Chicago, Stritch School Of Medicine, 1996
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 pain medicine (physical medicine & rehabilitation) physician records → All 290 in California → Look up another NPI →

Also registered at 2080 Century Park East

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

  1. Craig Anderson, DDSEndodontics1255459343
  2. Irwin Bliss, M.D.Orthopaedic Surgery Physician1801898689
  3. Gail Brockman, MDInternal Medicine Physician1336204494
  4. Susan Diskin, PHDClinical Psychologist1891845905
  5. Nicole Fram, MDOphthalmology Physician1114140795
  6. Carlo Honrado, M.D.Facial Plastic Surgery Physician1437265980

Verify Ajay K. Masih in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A64040    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

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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53% fewer Medicare Part D claims than the average pain medicine (physical medicine & rehabilitation) physician in 2024

700 Medicare Part D claims for 138 beneficiaries, against an average of 1,479 among the 1,457 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims. 362 claims were for opioids.

  1. Ajay Masih700
  2. Specialty average1,479

Most prescribed

  1. Hydrocodone-Acetaminophen138 claims
  2. Oxycodone Hcl127 claims
  3. Celecoxib60 claims
  4. Diclofenac Sodium60 claims
  5. Gabapentin51 claims
  6. Tramadol Hcl34 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.

Ajay K. Masih among 290 pain medicine (physical medicine & rehabilitation) physician records in California

Ajay K. Masih, M.D. is one of 290 pain medicine (physical medicine & rehabilitation) physician records with a practice address in California. 85% 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 · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 68% of these records are
  • Graduated1996 · median 2005 among the 196 with a school on file
  • Record last updated2023 · 50% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2081P2900X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pain Medicine (Physical Medicine & Rehabilitation) Physician providers in California

There are 290 pain medicine (physical medicine & rehabilitation) physician records in California.

All 290 in California → Every provider in Los Angeles → Pain Medicine (Physical Medicine & Rehabilitation) Physician nationwide →

The 8 pain medicine (physical medicine & rehabilitation) physician records with the nearest ZIP codes

  1. Timothy Nguyen, MDLos Angeles, CA 900671700409158
  2. Elite Ben-Ozer, M.D.Los Angeles, CA 900731083878581
  3. Edward Jinsoo Chang, DOLos Angeles, CA 900731235889585
  4. Jerome Lee, M.D.Los Angeles, CA 900731245477280
  5. Jennifer Leet, M.D.Los Angeles, CA 900731609309012
  6. Ryan McCarty, M.D.Los Angeles, CA 900731225482821
  7. Edward Pang, D.O.Los Angeles, CA 900731285920090
  8. Sanjog Pangarkar, M.D.Los Angeles, CA 900731922058825

Common questions

What is Ajay K. Masih, M.D.'s NPI number?

Ajay K. Masih, M.D.'s National Provider Identifier (NPI) is 1013072537, issued on Dec 26, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Ajay K. Masih, M.D. located?

The NPPES record lists a practice address at 2080 Century Park East, Los Angeles, CA, 90067. Phone: (310) 553-0123. Providers update this record themselves, so call before visiting.

How can I verify Ajay K. Masih, M.D.'s license?

NPPES lists California license number A64040, 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 Ajay K. Masih, M.D. prescribe under Medicare Part D?

In 2024, Ajay K. Masih, M.D. had 700 Medicare Part D claims for 138 beneficiaries; the average among pain medicine (physical medicine & rehabilitation) physician prescribers was 1,479. 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.