NPPES file of Aug 9, 2026

Mehera Halliwell, M.D.

Psychiatry Physician · Granada Hills, CA

Mehera Halliwell, M.D. is a psychiatry physician with a practice address in Granada Hills, California, and NPI 1366579138, issued on Feb 27, 2007. Check the license (California A90555, 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
1366579138
Name
Mehera Halliwell
Credential
M.D.
Primary taxonomy
Psychiatry Physician 2084P0800X
License number
A90555 CA
Self-reported in NPPES; status is on the state search
Practice location
10605 Balboa Blvd, Granada Hills, CA 91344
Phone
(818) 832-2400
Enumerated
Feb 27, 2007
Record last updated
Jan 30, 2009 (not updated in 17 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20071119000616); accepts Medicare assignment
Medical or professional school
University Of Southern California Keck 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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Also registered at 10605 Balboa Blvd

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

  1. Elena AdranedaDay Training/Habilitation Specialist1699950196
  2. Michael Alba, PSY.D.Clinical Child & Adolescent Psychologist1043399959
  3. Herbert Anderson Jr.Day Training/Habilitation Specialist1578642062
  4. Vinod Assomull, MDNephrology Physician1982619359
  5. Patricia Attalla, R.N.Psychiatric/Mental Health Registered Nurse1609934215
  6. Carla AvalosClinical Social Worker1437485646

Verify Mehera Halliwell in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A90555
    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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35% more Medicare Part D claims than the average psychiatry physician in 2024

1,349 Medicare Part D claims for 50 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.

  1. Mehera Halliwell1,349
  2. Specialty average1,000

Most prescribed

  1. Bupropion Xl119 claims
  2. Gabapentin81 claims
  3. Propranolol Hcl76 claims
  4. Aripiprazole73 claims
  5. Fluoxetine Hcl71 claims
  6. Lamotrigine64 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.

Industry payments in 2024: $2,959.26

80 payments; by number, the most common kind was food and beverage; the largest payer was Teva Pharmaceuticals USA, Inc. The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Mehera Halliwell$2,959.26
  2. Specialty average$4,954.93

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Pacific ClinicsPasadena, CA

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

Mehera Halliwell among 8,673 psychiatry physician records in California

Mehera Halliwell, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% 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 33% of them.

  • NPI issued2007 · 33% of these records are older, 48% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileYes · 38% of these records are
  • Graduated2003 · median 2005 among the 3,295 with a school on file
  • Record last updated2009 · 54% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Psychiatry Physician providers in California

There are 8,673 psychiatry physician records in California.

The 8 psychiatry physician records with the nearest ZIP codes

  1. Richard Jacobson, M,D,Granada Hills, CA 913441952443673
  2. Alex Kopelowicz, M.D.Granada Hills, CA 913441033291950
  3. Aneta Prince, MDGranada Hills, CA 913441295864536
  4. Karina Shulman, M.D.Granada Hills, CA 913441275631681
  5. Arin Abnoosian, M.D.Mission Hills, CA 913451255661658
  6. Megan Chiarelli, M.D.Mission Hills, CA 913451215256151
  7. Young Mee Choi, M.D.North Hills, CA 913431023115722
  8. Kenneth D'Oyen, MDNorth Hills, CA 913431962899062

Common questions

What is Mehera Halliwell, M.D.'s NPI number?

Mehera Halliwell, M.D.'s National Provider Identifier (NPI) is 1366579138, issued on Feb 27, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Mehera Halliwell, M.D. located?

The NPPES record lists a practice address at 10605 Balboa Blvd, Granada Hills, CA, 91344. Phone: (818) 832-2400. Providers update this record themselves, so call before visiting.

How can I verify Mehera Halliwell, M.D.'s license?

NPPES lists California license number A90555, 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 Mehera Halliwell, M.D. prescribe under Medicare Part D?

In 2024, Mehera Halliwell, M.D. had 1,349 Medicare Part D claims for 50 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.

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.