Garrett M. Halweg, M.D.
Psychiatry Physician · Corona Del Mar, CA
Garrett M. Halweg, M.D. is a psychiatry physician with a practice address in Corona Del Mar, California, and NPI 1982844064, issued on Mar 2, 2009. Check the license (California A73217, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Garrett M. Halweg
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A73217 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2600 E Coast Hwy, Corona Del Mar, CA 92625
- Phone
- (949) 338-1865
- Enumerated
- Mar 2, 2009
- Record last updated
- Mar 2, 2009 (not updated in 17 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 2600 E Coast Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Garrett M. Halweg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A73217Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average psychiatry physician in 2024
91 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Dextroamphetamine-Amphetamine38 claims
- Escitalopram Oxalate23 claims
- Propranolol Hcl12 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.
Psychiatry Physician providers in California
There are 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Corona Del Mar →
Other psychiatry physician records in California
- Nancy Aaen, MDNapa, CA1609816669
- Criselda Abad-Santos, M.D.Woodland Hills, CA1760461826
- Mekabiz Abaian, MDSan Bernardino, CA1891090163
- Brenda Abarca, MDTorrance, CA1407485527
- Pilar Abascal, M.D.Los Angeles, CA1730528191
- Michele Abbasi, M.D.Westlake Village, CA1093940330
- Zohaib AbbasiMartinez, CA1013392224
- Sandy Abdelkedous, MDFresno, CA1306093109
- Nancy Abdelmalak, M.D.Elk Grove, CA1912137498
- Ezzat Abdelmalek, M.DDana Point, CA1992828826
Common questions
What is Garrett M. Halweg, M.D.'s NPI number?
Garrett M. Halweg, M.D.'s National Provider Identifier (NPI) is 1982844064, issued on Mar 2, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Garrett M. Halweg, M.D. located?
The NPPES record lists a practice address at 2600 E Coast Hwy, Corona Del Mar, CA, 92625. Phone: (949) 338-1865. Providers update this record themselves, so call before visiting.
How can I verify Garrett M. Halweg, M.D.'s license?
NPPES lists California license number A73217, 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 Garrett M. Halweg, M.D. prescribe under Medicare Part D?
In 2024, Garrett M. Halweg, M.D. had 91 Medicare Part D claims; 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.