Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Steven Barry Machtinger, MD

Individual provider Pediatrics Physician · NPI 1093719437

Steven Barry Machtinger, MD is an Allergy/Immunology in San Francisco, California. Graduated from University of Pittsburgh School of Medicine in 1977, 49 years ago. Practices with Steven Machtinger MD and Associates Inc, a 2-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
49
Trained at
University of Pittsburgh School of Medicine
Licensed in
CA
In the registry since
2005
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

450 Sutter St Rm 933
San Francisco, CA 94108-3997
Phone: (415) 362-5443
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 725 Welch Rd, Palo Alto, CA 94304-1601 — (650) 497-8000
  • 100 South Ellsworth Avenue Suite 707, San Mateo, CA 94401-3927 — (650) 696-8230

Specialties & licences

Pediatric Allergy/Immunology Physician (primary) Taxonomy 2080P0201X · Licence G42041 (CA)
Pediatrics Physician Taxonomy 208000000X · Licence G42041 (CA)
Allergy & Immunology Physician Taxonomy 207K00000X · Licence G42041 (CA)

Record details

NPI number1093719437
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 13, 2005
Last updated in NPPESDecember 12, 2025
Certification dateDecember 12, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyALLERGY/IMMUNOLOGY
Medical schoolUNIVERSITY OF PITTSBURGH SCHOOL OF MEDICINE
Graduated 1977 (49 years in practice)
Group practice Steven Machtinger Md And Associates Inc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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