Derek Lee Hauser, D.O.

Geriatric Medicine (Internal Medicine) Physician · San Diego, CA

Derek Lee Hauser, D.O. is a geriatric medicine (internal medicine) physician with a practice address in San Diego, California, and NPI 1093961757, issued on Aug 13, 2008. Check the license (California 20A10044, 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

1093961757

Name: Derek Lee Hauser
Credential: D.O.
Primary taxonomy: Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number: 20A10044 CA
Self-reported in NPPES; status is on the state search
Practice location: 5034 February St, San Diego, CA 92110
Phone: (661) 317-7032
Enumerated: Aug 13, 2008
Record last updated: Oct 14, 2021 (not updated in 5 years: call before relying on the address or phone)
Entity: Type 1 · individual

Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.

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8 nearest geriatric medicine (internal medicine) physician records → All 532 in California → Look up another NPI →

Verify Derek Lee Hauser in five checks

1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
2LicenseActive license and public ordersMedical Board of California
Search for license 20A10044Check the board
3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
5CertificationBoard certificationABMS AOA NCCPA AANPNot checked

Open the California license search

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79% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

889 Medicare Part D claims for 34 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.

Derek Hauser889
Specialty average4,246

Most prescribed

Levothyroxine Sodium63 claims
Atorvastatin Calcium57 claims
Amlodipine Besylate48 claims
Alendronate Sodium41 claims
Trazodone Hcl36 claims
Lisinopril35 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.

Derek Lee Hauser among 532 geriatric medicine (internal medicine) physician records in California

Derek Lee Hauser, D.O. is one of 532 geriatric medicine (internal medicine) physician records with a practice address in California. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 66% of them.

NPI issued2008 · 66% of these records are older, 30% newer
In a Medicare fileYes · 77% of these records are
In the CMS Doctors and Clinicians fileNo · 51% of these records are
Record last updated2021 · 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 207RG0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Internal Medicine) Physician providers in California

There are 532 geriatric medicine (internal medicine) physician records in California.

All 532 in California → Every provider in San Diego → Geriatric Medicine (Internal Medicine) Physician nationwide →

The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes

Pouya Afshar, M.D.San Diego, CA 921081184958977
Gregory Antkowiak, MDSan Diego, CA 921081154307775
Cary Bayne, MDSan Diego, CA 921081366463218
Eric Emont, M.D.San Diego, CA 921081376626754
Winston Mina, MDSan Diego, CA 921081174582001
Aboo Nasar, M.D.San Diego, CA 921081871533380
Richard Nguyen, M.D.San Diego, CA 921081275724361
Danilo Tan, M.D.San Diego, CA 921081073648200

Common questions

What is Derek Lee Hauser, D.O.'s NPI number?

Derek Lee Hauser, D.O.'s National Provider Identifier (NPI) is 1093961757, issued on Aug 13, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Derek Lee Hauser, D.O. located?

The NPPES record lists a practice address at 5034 February St, San Diego, CA, 92110. Phone: (661) 317-7032. Providers update this record themselves, so call before visiting.

How can I verify Derek Lee Hauser, D.O.'s license?

NPPES lists California license number 20A10044, 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 Derek Lee Hauser, D.O. prescribe under Medicare Part D?

In 2024, Derek Lee Hauser, D.O. had 889 Medicare Part D claims for 34 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.