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Mr. Steven B Machtinger MD, Allergist and Immunologist

Mr. Steven B Machtinger MD

Allergist and Immunologist

100 South Ellsworth Avenue Suite 700 San Mateo CA, 94401



Dr. Steven Machtinger practices Allergy, Asthma and Immunology in San Mateo, CA. He specializes in the diagnosis and treatment of asthma and other allergic diseases of infants, children and adults. Allergist-Immunologists are trained and certified to treat each patient's sensitivity and response to environmental allergens. They are also trained to identify and differentiate the allergic and immunologic causes of diseases affecting the respiratory and gastrointestinal tracts and the skin. Dr. Machtinger provides several means of testing and treatment to improve immunity to potentially harmful substances. Before I trained in allergy-immunology-and respiratory diseases at Stanford, I worked for two years as a general practitioner in Oregon with the Indian Health Service and then completed residency in Pediatrics at Stanford. My wife and I have two grown children and three granddaughters. In my spare time I enjoy cycling, hiking and playing the acoustic guitar.

Education and Training

Univ of Pittsburgh Sch of Med, Pittsburgh Pa 1977

Board Certification

American Board of Allergy and Immunology

American Board of Pediatrics

PediatricsAmerican Board of PediatricsABP

Provider Details

Male English, Spanish 36 years of experience
Mr. Steven B Machtinger MD
Mr. Steven B Machtinger MD's Expert Contributions
  • Why am I allergic to just soy milk and no other soy product?

    That's a tough question to answer. Since you tolerate soybeans you may not be allergic to soy protein. Most people allergic to soy protein can tolerate some soy products. Soy sauce is made by fermenting soy beans and this appears to render the allergens inactive for most soy-allergic individuals. Soy lecithin is a fat and contains no soy allergen (unless as a contaminant) so that too is typically tolerated by soy-allergic persons. Soy "milk" is not a true milk and often contains other ingredients to make the beverage more milk-like in consistency, smoothness, pour-ability and taste. Some of these ingredients may be vegetable gums or natural flavors. You might be allergic to these extra ingredients rather than to soy. You should be able to resolve this problem with the assistance of a board-certified allergist. Alternatively you could try other brands of soy milk to see if this problem occurs with all or most of them or with just one brand. Steve Machtinger, MD FAAAAI READ MORE

Areas of expertise and specialization

skin testing, lung function testing, food allergy and drug allergy skin testing, oral challenges to foods & medications

Faculty Titles & Positions

  • President Allergy, Asthma & Immunology Foundation of Northern California 2010 - 2016
  • Board Member Western Society of Allergy, Asthma, and Immunology 2015 - 2016
  • Adjunct Clinical Associate Professor Stanford Medical School 2009 - 2016

Professional Memberships

  • American Academy of Allergy, Asthma, and Immunology  


  • Stanford Univ Hosp, Pediatrics; Univ Ca Irvine Med Ctr, Pediatrics  

Hospital Affiliations

  • Lucile Packard Children's Hospital at Stanford ( Palo Alto, CA )
  • Mills Health Center ( San Mateo, CA )
  • Sequoia Hospital ( Redwood City, CA )
  • Stanford Hospital ( Stanford, CA )

Mr. Steven B Machtinger MD's Practice location

Mr. Steven Machtinger, MD

100 South Ellsworth Avenue Suite 700 -
San Mateo, CA 94401
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New patients: 650-696-8230
Fax: 650-696-8238

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Patient Experience with Dr. Machtinger


Based on 3 reviews

Mr. Steven B Machtinger MD has a rating of 5 out of 5 stars based on the reviews from 3 patients. FindaTopDoc has aggregated the experiences from real patients to help give you more insights and information on how to choose the best Allergist and Immunologist in your area. These reviews do not reflect a providers level of clinical care, but are a compilation of quality indicators such as bedside manner, wait time, staff friendliness, ease of appointment, and knowledge of conditions and treatments.

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Head northwest on South Ellsworth Avenue 283 ft
Turn left onto Baldwin Avenue 1091 ft
Turn right onto North el Camino Real (CA 82) 5180 ft
Continue straight onto El Camino Real (CA 82) 2.7 mi
Turn left onto Trousdale Drive 1040 ft
Turn left 409 ft
Turn left 282 ft
Turn right 136 ft
You have arrived at your destination, on the left


222 W 39TH AVE SAN MATEO CA 94403

Head southeast on South Ellsworth Avenue 704 ft
Turn left onto East 3rd Avenue 1193 ft
Turn right onto South Delaware Street 1.8 mi
Turn right onto East 25th Avenue 794 ft
Turn left onto El Camino Real (CA 82) 2557 ft
Go straight 1000 ft
Turn right onto West Hillsdale Boulevard 1023 ft
Turn left onto Edison Street 1015 ft
Turn right onto 37th Avenue 433 ft
Turn left 46 ft
Make a slight right 211 ft
You have arrived at your destination, on the left



Head southeast on South Ellsworth Avenue 704 ft
Turn left onto East 3rd Avenue 1193 ft
Turn right onto South Delaware Street 373 ft
Turn left onto East 4th Avenue 1733 ft
Take the ramp 1410 ft
Merge left onto Bayshore Freeway (US 101) 6.1 mi
Take the ramp on the right 1107 ft
Continue straight onto Veterans Boulevard 876 ft
Keep right 403 ft
Turn right onto Whipple Avenue 1.4 mi
Turn right onto Alameda de las Pulgas 532 ft
Turn left onto Sequoia Way 611 ft
You have arrived at your destination, on the left