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Edit this profileAt a glance
- 101 the City Dr S, Orange, CA 92868
About Dr. Armstrong
William Armstrong, MD is a healthcare provider in Orange, CA specializing in otolaryngology (ent). William trained at University of Washington School of Medicine, graduating in 1988. Medicare claims data shows William provided 434 services to 348 patients. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, new patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more, and diagnostic exam of voice box using a flexible endoscope. This provider record is associated with NPI 1063592145.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (714) 880-7812
- Email not available
Practice Locations
101 THE CITY DR S
Orange, CA 92868
Conditions Commonly Evaluated or Treated
Within Otolaryngology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Cancer
- Nasopharyngeal cancer
- Oropharyngeal cancer
- Sinonasal cancer
- Laryngeal cancer
- Oral cavity cancer
- Skin cancer of the head and neck
Pediatric and congenital
Most searched conditions
Balance
Ear and hearing
- Cholesteatoma
- Eustachian tube dysfunction
- Hearing loss
- Otosclerosis
- Perforated eardrum
- Swimmer's ear
Head, neck, and salivary
Nose and sinus
- Broken nose
- Deviated septum
- Loss or reduction of smell
- Nasal obstruction
- Nasal polyps
- Nosebleeds
- Seasonal allergies
Sleep and airway
Throat and voice
- Enlarged adenoids
- Globus sensation
- Hoarseness and voice change
- Laryngopharyngeal reflux
- Swallowing difficulties
- Vocal cord nodules
- Vocal cord paralysis
Head & Neck
Throat & Voice
Procedures & services
Cosmetic
Ear & Hearing
Ear procedures
- Bone-anchored hearing-device placement
- Cochlear implant surgery
- Ear-tube placement
- Eardrum repair
- Mastoid surgery
- Stapes surgery
- Earwax removal
Endocrine Surgery
Facial plastic and reconstructive
Head & Neck
Head and neck surgery
- Parathyroid surgery
- Submandibular gland removal
- Thyroid removal surgery
- Transoral robotic surgery
- Voice-box removal
- Neck lymph-node dissection
- Parotid gland surgery
Nose & Sinus
Nose and sinus procedures
- Balloon sinus dilation
- Endoscopic sinus surgery
- Nasal cautery for nosebleeds
- Nasal-polyp removal
- Reduction of a broken nose
- Septoplasty
- Turbinate reduction
- Rhinoplasty
Office diagnosis
- Balance and vestibular testing
- ENT consultation
- Fine-needle aspiration of a neck mass
- Flexible laryngoscopy
- Hearing test
- Nasal endoscopy
- Rigid laryngoscopy
Throat, voice, and swallowing
Most searched procedures
Sleep and airway
Throat & Voice
Procedures Most Often Billed to Medicare
434 services · 348 patients · 8 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Diagnostic exam of voice box using a flexible endoscope | Procedure | 31575 |
40 | As often as other peers in Otolaryngology (ENT) |
| Fine needle aspiration biopsy using ultrasound guidance, first growth | Procedure | 10005 |
15 | Less often than most peers in Otolaryngology (ENT) |
| Ultrasound scan of head and neck soft tissue | Imaging | 76536 |
20 | Less often than most peers in Otolaryngology (ENT) |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
208 | More often than most peers in Otolaryngology (ENT) |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
65 | More often than most peers in Otolaryngology (ENT) |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
33 | Less often than most peers in Otolaryngology (ENT) |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
33 | More often than most peers in Otolaryngology (ENT) |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
20 | More often than most peers in Otolaryngology (ENT) |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other otolaryngology specialists in Orange 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at University of Washington School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1988 at University of Washington School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Diagnostic exam of voice box using a flexible endoscope 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Dr. Armstrong's specialty?
Dr. Armstrong is an otolaryngology (ent) in Orange, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Dr. Armstrong?
Dr. Armstrong is listed at 101 the City Dr S, Orange, CA 92868. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Armstrong?
The number on file is (714) 880-7812. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Armstrong?
Dr. Armstrong's National Provider Identifier is 1063592145. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Armstrong's medical education?
Dr. Armstrong attended University of Washington School of Medicine, graduating in 1988. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Armstrong have?
Dr. Armstrong has 38 years experience. Calculated from a graduation year of 1988, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Armstrong known for?
According to Medicare billing data, Dr. Armstrong performs procedures including diagnostic exam of voice box using a flexible endoscope and fine needle aspiration biopsy using ultrasound guidance, first growth; reads or performs imaging such as ultrasound scan of head and neck soft tissue, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Armstrong's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Armstrong. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.