Dennis Michael O'Brien, DDS
Dentist · La Mesa, CA
Dennis Michael O'Brien, DDS is a dentist with a practice address in La Mesa, California, and NPI 1023267408, issued on Sep 10, 2008. Check the license (California 57392, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Dennis Michael O'Brien
- Credential
- DDS
- Primary taxonomy
- Dentist 122300000X
- License numbers
- 57392 CA
2008024051 MO
Self-reported in NPPES; status is on the state search - Practice location
- 5308 Lake Murray Blvd, La Mesa, CA 91942
- Phone
- (619) 337-2970
- Enumerated
- Sep 10, 2008
- Record last updated
- Sep 12, 2016 (not updated in 10 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest dentist records → All 14,729 in California → Look up another NPI →
Also registered at 5308 Lake Murray Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jerry Herring, DDSGeneral Practice Dentistry1487762233
- Stephen Mann, D.D.S.Dentist1033427117
- Allen Wei, D.D.SEndodontics1366659203
Verify Dennis Michael O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 57392Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% fewer Medicare Part D claims than the average dentist in 2024
40 Medicare Part D claims for 24 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin23 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.
Dennis Michael O'Brien among 14,729 dentist records in California
Dennis Michael O'Brien, DDS is one of 14,729 dentist records with a practice address in California. 56% 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 42% of them.
- NPI issued2008 · 42% of these records are older, 52% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2016 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
54 dentist records list a practice address in La Mesa
They are 54 of the 2,168 NPPES records with a practice address in La Mesa, and 14,729 dentist records in California.
All 14,729 in California → Every provider in La Mesa → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Christine AllenLa Mesa, CA 919421932435955
- Rigoberto Cervantes, D.D.S.La Mesa, CA 919421356403513
- Eileen Dimapilis, DMDLa Mesa, CA 919421811198948
- Arash Kamali Taha, DDSLa Mesa, CA 919421356543896
- Stephen Mann, D.D.S.La Mesa, CA 919421033427117
- Meryl Olsen, DDSLa Mesa, CA 919421154407328
- Timothy Shen, DMDLa Mesa, CA 919421821094160
- Fiona Tavakoli, DMDLa Mesa, CA 919421932410420
Common questions
What is Dennis Michael O'Brien, DDS's NPI number?
Dennis Michael O'Brien, DDS's National Provider Identifier (NPI) is 1023267408, issued on Sep 10, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Dennis Michael O'Brien, DDS located?
The NPPES record lists a practice address at 5308 Lake Murray Blvd, La Mesa, CA, 91942. Phone: (619) 337-2970. Providers update this record themselves, so call before visiting.
How can I verify Dennis Michael O'Brien, DDS's license?
NPPES lists California license number 57392, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Dennis Michael O'Brien, DDS prescribe under Medicare Part D?
In 2024, Dennis Michael O'Brien, DDS had 40 Medicare Part D claims for 24 beneficiaries; the average among dentist prescribers was 86. 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.