William Armstrong, MD
Otolaryngology Physician · Orange, CA
William Armstrong, MD is an otolaryngology physician with a practice address in Orange, California, and NPI 1063592145, issued on Oct 16, 2006. Check the license (California G66175, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Armstrong
- Credential
- MD
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- G66175 CA
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Dr S, Orange, CA 92868
- Phone
- (714) 880-7812
- Enumerated
- Oct 16, 2006
- Record last updated
- Jan 31, 2025
- Medicare enrollment
- Enrolled (PECOS I20080327000591); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 1,212 in California → Look up another NPI →
Also registered at 101 The City Dr S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danny Abad, PAPhysician Assistant1477158673
- Edward AbaradoStudent in an Organized Health Care Education/Training Program1912855198
- Nagina Abdiani, DOGeriatric Medicine (Family Medicine) Physician1518543271
- Mariam Abdul-Latif, M.D.Pediatrics Physician1538418884
- Eric AbelloOtolaryngology Physician1922566215
- Brandon Abeyta, MDAnesthesiology Physician1841291804
Verify William Armstrong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G66175Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average otolaryngology physician in 2024
78 Medicare Part D claims for 27 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D.
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.
The MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $15.88
1 payment: food and beverage; the largest payer was Solventum Corporation. The 6,429 providers of this specialty with any payment received $1,922.50 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
- University Head And Neck SurgeonsOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Armstrong among 1,212 otolaryngology physician records in California
William Armstrong, MD is one of 1,212 otolaryngology physician records with a practice address in California. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1988 · median 2004 among the 818 with a school on file
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in California
There are 1,212 otolaryngology physician records in California.
All 1,212 in California → Every provider in Orange → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Gurpreet Ahuja, MDOrange, CA 928681013970169
- Faramarz Alizadeh-Shabdiz, M.DOrange, CA 928681790955052
- Navin Amin, M.D.Orange, CA 928681851390314
- Roberto Barretto, M.D.Orange, CA 928681477552941
- Roger L Crumley, MDOrange, CA 928681003996190
- Robert Del Junco, M.D.Orange, CA 928681295734721
- Esther Fine, M.D.Orange, CA 928681679745996
- Rohit Garg, MD, MBAOrange, CA 928681497944755
Common questions
What is William Armstrong, MD's NPI number?
William Armstrong, MD's National Provider Identifier (NPI) is 1063592145, issued on Oct 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Armstrong, MD located?
The NPPES record lists a practice address at 101 The City Dr S, Orange, CA, 92868. Phone: (714) 880-7812. Providers update this record themselves, so call before visiting.
How can I verify William Armstrong, MD's license?
NPPES lists California license number G66175, 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 William Armstrong, MD prescribe under Medicare Part D?
In 2024, William Armstrong, MD had 78 Medicare Part D claims for 27 beneficiaries; the average among otolaryngology physician prescribers was 541. Part D covers Medicare prescriptions only.
What is William Armstrong, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.