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- 1450 Treat Blvd, Suite 300, Walnut Creek, CA 94597
About Cynthia Ashbrook
Cynthia Ashbrook is a healthcare provider in Walnut Creek, CA specializing in allergy & immunology. Cynthia trained at University of South Carolina School of Medicine, graduating in 1987. According to Medicare claims data, Cynthia cared for 25 Medicare patients across 25 services. 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. This provider record is associated with NPI 1386786408.
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
- (925) 952-2888
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
1450 TREAT BLVD SUITE 300
Walnut Creek, CA 94597
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
Breathing & Airway
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
25 services · 25 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
25 | Less often than most 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 allergists in Walnut Creek 8
Same specialty, same city.
Trained at University of South Carolina School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 1987 at University of South Carolina School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Cynthia Ashbrook's specialty?
Cynthia Ashbrook is an allergist in Walnut Creek, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Allergy & Immunology”.
NPI registry
Where can I find Cynthia Ashbrook?
Cynthia Ashbrook is listed at 1450 Treat Blvd Suite 300, Walnut Creek, CA 94597. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Cynthia Ashbrook?
The number on file is (925) 952-2888. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Cynthia Ashbrook's NPI number?
Cynthia Ashbrook's National Provider Identifier is 1386786408. 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 Cynthia Ashbrook's education?
Cynthia Ashbrook attended University of South Carolina School of Medicine, graduating in 1987. This comes from the CMS National Downloadable File.
CMS public data
How long has Cynthia Ashbrook been practicing?
Cynthia Ashbrook has 39 years experience. Calculated from a graduation year of 1987, reported in the CMS National Downloadable File.
CMS public data
What is Cynthia Ashbrook known for?
According to Medicare billing data, Cynthia Ashbrook the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Cynthia Ashbrook confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Cynthia Ashbrook. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.