Physician Profile
Anita C. Choy, MD
Unclaimed ProfileAbout Dr. Choy
Anita C. Choy, MD is a healthcare provider in Palo Alto, CA specializing in allergy/immunology. Anita is also listed as specializing in allergy. According to Medicare claims data, Anita cared for 493 Medicare patients across 5,004 services. The services billed most often include professional service for preparation and provision of 1 or more antigens, test for allergy using allergenic extract, and professional service for multiple injections of allergen. This provider record is associated with NPI 1639136690.
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
- (650) 322-3847
- Email not available
Practice Locations
1101 WELCH RD #A2
Palo Alto, CA 94304
Conditions Commonly Evaluated or Treated
Within Allergy and Immunology 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
Most searched conditions
Allergies
Digestive
Drug allergies
Drug allergy
Emergency
Environmental
Eye
Food allergies
- Egg Allergy
- Milk Allergy
- Peanut Allergy
- Shellfish Allergy
- Soy Allergy
- Tree Nut Allergy
- Wheat Allergy
Immune conditions
Immunology
- Common Variable Immunodeficiency
- Frequent Infections
- Hereditary Angioedema
- Mast Cell Activation Syndrome
- Weak Immune System
Lung conditions
Respiratory
Sinus
Sinus conditions
Skin
Skin conditions
Procedures & services
Most searched procedures
Allergy treatments
- Allergy Drops
- Asthma Biologics
- Food Desensitization
- Peanut Allergy Pill Treatment
- Sublingual Dust Mite Treatment
- Under-The-Tongue Allergy Tablets
Diagnostic
- Asthma challenge test
- Drug Challenge Test
- Exercise Challenge Breathing Test
- Exhaled nitric oxide test
- Ice Cube Test for Cold Allergy
- Immune System Blood Test
- Nasal endoscopy
- Oral Food Challenge
- Peak Flow Test
- Penicillin Allergy Testing
- Spirometry
- Tryptase Blood Test
- Vaccine Challenge Test
- Vaccine Response Antibody Test
Infusion
Medication therapy
Medications
Preventive
Respiratory
Tests
- Allergy Blood Testing
- Allergy Skin Prick Test
- Blood Component Allergy Test
- Complement Blood Test
- Eosinophil Blood Count
- Intradermal Allergy Test
- Pulmonary function test
- Skin Test For Metal Allergy
- Total IgE Blood Test
Treatment
Procedures Most Often Billed to Medicare
5,004 services · 493 patients · 12 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Professional service for preparation and provision of 1 or more antigens | Treatment | 95165 |
2,112 | More often than most peers in Allergy/Immunology |
| Test for allergy using allergenic extract | Treatment | 95004 |
994 | Less often than most peers in Allergy/Immunology |
| Professional service for multiple injections of allergen | Treatment | 95117 |
934 | More often than most peers in Allergy/Immunology |
| Test for allergy using allergenic extract injected into skin | Treatment | 95024 |
400 | As often as other peers in Allergy/Immunology |
| Test to measure the level of nitric oxide gas | Treatment | 95012 |
146 | More often than most peers in Allergy/Immunology |
| Test to measure expiratory airflow and volume | Treatment | 94010 |
106 | More often than most peers in Allergy/Immunology |
| Test to measure expiratory airflow and volume changes before and after medication administration | Treatment | 94060 |
46 | More often than most peers in Allergy/Immunology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
109 | As often as other peers in Allergy/Immunology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
108 | More often than most peers in Allergy/Immunology |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
24 | As often as other peers in Allergy/Immunology |
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.
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 allergy/immunology specialists in Palo Alto 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1986 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Professional service for preparation and provision of 1 or more antigens 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Choy?
Dr. Choy is an allergy/immunology in Palo Alto, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Dr. Choy's address?
Dr. Choy is listed at 1101 Welch Rd #A2, Palo Alto, CA 94304. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Choy?
The number on file is (650) 322-3847. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Choy's NPI number?
Dr. Choy's National Provider Identifier is 1639136690. 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
Where did Dr. Choy train?
Dr. Choy attended Other, graduating in 1986. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Choy been practicing?
Dr. Choy has 40 years experience. Calculated from a graduation year of 1986, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Choy perform?
According to Medicare billing data, Dr. Choy provides treatments such as professional service for preparation and provision of 1 or more antigens and test for allergy using allergenic extract, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Choy confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Choy. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.