NPPES file of Aug 9, 2026

Louis Tieu, D.D.S.,M.D.

Oral & Maxillofacial Surgery (D.M.D.) · Campbell, CA

Louis Tieu, D.D.S.,M.D. is an oral & maxillofacial surgery (d.m.d.) with a practice address in Campbell, California, and NPI 1972641595, issued on Feb 3, 2007. Check the license (California A82866, as entered in NPPES) with the California board that licenses this profession; 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
1972641595
Name
Louis Tieu
Credential
D.D.S.,M.D.
Primary taxonomy
Oral & Maxillofacial Surgery (D.M.D.) 204E00000X
License numbers
A82866 CA
44633 CA
Self-reported in NPPES; status is on the state search
Practice location
281 E Hamilton Ave, Campbell, CA 95008
Phone
(408) 871-2988
Enumerated
Feb 3, 2007
Record last updated
Sep 11, 2025
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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Also registered at 281 E Hamilton Ave

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

  1. Michael Brass, D.C.Chiropractor1275758211
  2. Steve Chu, D.D.S.General Practice Dentistry1417133042
  3. Colleen Conger-Brass, D.C.Chiropractor1982829925
  4. Jeffrey Kaplan, D.C.Chiropractor1326139957
  5. Steven Musich, DCChiropractor1669849667
  6. Bhavana Thakur, DDSGeneral Practice Dentistry1861458713

Verify Louis Tieu in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license A82866
    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
Find 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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79% fewer Medicare Part D claims than the average oral & maxillofacial surgery (d.m.d.) in 2024

78 Medicare Part D claims for 40 beneficiaries, against an average of 366 among the 1,051 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.

  1. Louis Tieu78
  2. Specialty average366

Most prescribed

  1. Penicillin V Potassium34 claims
  2. Amoxicillin18 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.

Louis Tieu among 154 oral & maxillofacial surgery (d.m.d.) records in California

Louis Tieu, D.D.S.,M.D. is one of 154 oral & maxillofacial surgery (d.m.d.) records with a practice address in California. 87% 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 27% of them.

  • NPI issued2007 · 27% of these records are older, 49% newer
  • In a Medicare fileYes · 87% of these records are
  • In the CMS Doctors and Clinicians fileNo · 16% of these records are
  • Record last updated2025 · 51% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 204E00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Oral & Maxillofacial Surgery (D.M.D.) providers in California

There are 154 oral & maxillofacial surgery (d.m.d.) records in California.

The 8 oral & maxillofacial surgery (d.m.d.) records with the nearest ZIP codes

  1. Nima Massoomi, DMD, MED, MDCupertino, CA 950141346397221
  2. Joseph McMurray, D.M.D.Gilroy, CA 950201730288671
  3. John Emison, M.D., D.D.S.Los Gatos, CA 950321114091816
  4. Nicole Lee, DDSSanta Clara, CA 950501043844889
  5. Ramiz Mogannam, DMDSanta Clara, CA 950501700244068
  6. Nikhil Desai, DMD, MDSanta Clara, CA 950511598812471
  7. Alireza Sodeifi, M.D., D.M.D.Saratoga, CA 950701851407753
  8. Greg Loitz, MD DDSLa Selva Beach, CA 950761194803247

Common questions

What is Louis Tieu, D.D.S.,M.D.'s NPI number?

Louis Tieu, D.D.S.,M.D.'s National Provider Identifier (NPI) is 1972641595, issued on Feb 3, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Louis Tieu, D.D.S.,M.D. located?

The NPPES record lists a practice address at 281 E Hamilton Ave, Campbell, CA, 95008. Phone: (408) 871-2988. Providers update this record themselves, so call before visiting.

How can I verify Louis Tieu, D.D.S.,M.D.'s license?

NPPES lists California license number A82866, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Louis Tieu, D.D.S.,M.D. prescribe under Medicare Part D?

In 2024, Louis Tieu, D.D.S.,M.D. had 78 Medicare Part D claims for 40 beneficiaries; the average among oral & maxillofacial surgery (d.m.d.) prescribers was 366. 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.