Allen Y. Tham, MD
Orthopaedic Hand Surgery Physician · Fullerton, CA
Allen Y. Tham, MD is an orthopaedic hand surgery physician with a practice address in Fullerton, California, and NPI 1578715801, issued on Oct 17, 2008. Check the license (California A110804, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Allen Y. Tham
- Credential
- MD
- Primary taxonomy
- Orthopaedic Hand Surgery Physician 207XS0106X
- License numbers
- A110804 CA
MT185928 PA
Self-reported in NPPES; status is on the state search - Practice location
- 2141 N Harbor Blvd, Fullerton, CA 92835
- Phone
- (714) 626-8630
- Enumerated
- Oct 17, 2008
- Record last updated
- Apr 30, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (714) 626-8659
- Medicare enrollment
- Enrolled (PECOS I20110804000586); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest orthopaedic hand surgery physician records → All 288 in California → Look up another NPI →
Also registered at 2141 N Harbor Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Donald BittnerOrthopaedic Hand Surgery Physician1538169578
- Bradley Borsari, MDInternal Medicine Physician1104826619
- Alison Brown, N.P.Family Nurse Practitioner1396093738
- Ruben Cabral, MDInternal Medicine Physician1568458008
- Carl Chen, M.D.Orthopaedic Hand Surgery Physician1235114950
- Theodoros Daskalakis, MDSurgery Physician1467409250
Verify Allen Y. Tham in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A110804Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average orthopaedic hand surgery physician in 2024
27 Medicare Part D claims for 23 beneficiaries, against an average of 186 among the 2,203 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
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: $153.79
1 payment: food and beverage; the largest payer was Stryker Corporation. The 1,819 providers of this specialty with any payment received $5,529.86 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
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
- Providence Medical FoundationFullerton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Allen Y. Tham among 288 orthopaedic hand surgery physician records in California
Allen Y. Tham, MD is one of 288 orthopaedic hand surgery physician records with a practice address in California. 85% 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 62% of them.
- NPI issued2008 · 62% of these records are older, 33% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2005 · median 2004 among the 214 with a school on file
- Record last updated2013 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XS0106X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Hand Surgery Physician providers in California
There are 288 orthopaedic hand surgery physician records in California.
All 288 in California → Every provider in Fullerton → Orthopaedic Hand Surgery Physician nationwide →
The 8 orthopaedic hand surgery physician records with the nearest ZIP codes
- Donald BittnerFullerton, CA 928351538169578
- Carl Chen, M.D.Fullerton, CA 928351235114950
- Michael Rubinstein, M.D.Fullerton, CA 928311780620013
- David Hay, M.D.Anaheim, CA 928061891982260
- Christian Awah, MDOrange, CA 928681013470707
- Paul Dinh, M.D.Orange, CA 928681518159961
- Navid Ghalambor, M.D.Orange, CA 928681619920667
- Daniel GittingsOrange, CA 928681205256229
Common questions
What is Allen Y. Tham, MD's NPI number?
Allen Y. Tham, MD's National Provider Identifier (NPI) is 1578715801, issued on Oct 17, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Allen Y. Tham, MD located?
The NPPES record lists a practice address at 2141 N Harbor Blvd, Fullerton, CA, 92835. Phone: (714) 626-8630. Providers update this record themselves, so call before visiting.
How can I verify Allen Y. Tham, MD's license?
NPPES lists California license number A110804, 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 Allen Y. Tham, MD prescribe under Medicare Part D?
In 2024, Allen Y. Tham, MD had 27 Medicare Part D claims for 23 beneficiaries; the average among orthopaedic hand surgery physician prescribers was 186. 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.