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 practises 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

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients118
Services billed 6,737 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $481 18 payments · a meal or drink at a meeting or visit, not a fee
Education $55 1 payment · educational material or training, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Steven Machtinger MD and Associates Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in San Francisco