Becky Thai Muldoon, MD
Endocrinology, Diabetes & Metabolism Physician · Fullerton, CA
Becky Thai Muldoon, MD is an endocrinology, diabetes & metabolism physician with a practice address in Fullerton, California, and NPI 1316272180, issued on Oct 12, 2009. Check the license (California C172133, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Becky Thai Muldoon
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- C172133 CA
MD16114 HI
Self-reported in NPPES; status is on the state search - Practice location
- 100 E Valencia Mesa Dr Ste 105, Fullerton, CA 92835
- Phone
- (714) 446-5640
- Enumerated
- Oct 12, 2009
- Record last updated
- Nov 8, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210526001171); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 100 E Valencia Mesa Dr Ste 105
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Hernandez, RNRegistered Nurse1801731039
- Ruth Hwang, MS, PA-CPhysician Assistant1821332156
- Maximiliano Hyon, D.O.Endocrinology, Diabetes & Metabolism Physician1942626767
- Michael Kuo, MDEndocrinology, Diabetes & Metabolism Physician1033593744
- Jason Ling, MDEndocrinology, Diabetes & Metabolism Physician1154664597
- Shilpa Mehta, MDEndocrinology, Diabetes & Metabolism Physician1548422991
Verify Becky Thai Muldoon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C172133Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
3,296 Medicare Part D claims for 564 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims.
Most prescribed
- Levothyroxine Sodium424 claims
- Ozempic331 claims
- Metformin Hcl163 claims
- Metformin Hcl Er147 claims
- Synthroid139 claims
- Mounjaro129 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.
Industry payments in 2024: $1,783.40
65 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 5,661 providers of this specialty with any payment received $5,742.15 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).
Becky Thai Muldoon among 1,131 endocrinology, diabetes & metabolism physician records in California
Becky Thai Muldoon, MD is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 64% of them.
- NPI issued2009 · 64% of these records are older, 32% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2009 · median 2003 among the 779 with a school on file
- Record last updated2021 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Fullerton → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Serhat Aytug, M.D.Fullerton, CA 928351194707471
- Jeffrey Bodwin, MDFullerton, CA 928351932195476
- John Gilbert, M.D.Fullerton, CA 928351588650667
- Maximiliano Hyon, D.O.Fullerton, CA 928351942626767
- Michael Kuo, MDFullerton, CA 928351033593744
- Jason Ling, MDFullerton, CA 928351154664597
- Shilpa Mehta, MDFullerton, CA 928351548422991
- Steven Saltman, M.D.Fullerton, CA 928351770579153
Common questions
What is Becky Thai Muldoon, MD's NPI number?
Becky Thai Muldoon, MD's National Provider Identifier (NPI) is 1316272180, issued on Oct 12, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Becky Thai Muldoon, MD located?
The NPPES record lists a practice address at 100 E Valencia Mesa Dr Ste 105, Fullerton, CA, 92835. Phone: (714) 446-5640. Providers update this record themselves, so call before visiting.
How can I verify Becky Thai Muldoon, MD's license?
NPPES lists California license number C172133, 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 Becky Thai Muldoon, MD prescribe under Medicare Part D?
In 2024, Becky Thai Muldoon, MD had 3,296 Medicare Part D claims for 564 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.