Steven Barry Machtinger, MD
Pediatric Allergy/Immunology Physician · San Francisco, CA
Steven Barry Machtinger, MD is a pediatric allergy/immunology physician with a practice address in San Francisco, California, and NPI 1093719437, issued on Jun 13, 2005. Check the license (California G42041, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steven Barry Machtinger
- Credential
- MD
- Primary taxonomy
- Pediatric Allergy/Immunology Physician 2080P0201X
- License number
- G42041 CA
Self-reported in NPPES; status is on the state search - Practice location
- 450 Sutter St RM 933, San Francisco, CA 94108
- Phone
- (415) 362-5443
- Enumerated
- Jun 13, 2005
- Record last updated
- Dec 12, 2025
- Medicare enrollment
- Enrolled (PECOS I20070105000410); accepts Medicare assignment
- Medical or professional school
- University Of Pittsburgh School Of Medicine, 1977
- Entity
- Type 1 · individual
8 nearest pediatric allergy/immunology physician records → All 52 in California → Look up another NPI →
Also registered at 450 Sutter St RM 933
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Gerald Kangelaris, MDOtolaryngology Physician1922234285
- Dean Kardassakis, MDAllergy Physician1811906571
Verify Steven Barry Machtinger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G42041Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% more Medicare Part D claims than the average pediatric allergy/immunology physician in 2024
404 Medicare Part D claims for 97 beneficiaries, against an average of 259 among the 198 providers of this specialty who prescribed in Part D. Brand-name drugs were 56% of claims.
Most prescribed
- Epinephrine30 claims
- Trelegy Ellipta25 claims
- Ipratropium Bromide24 claims
- Albuterol Sulfate Hfa21 claims
- Montelukast Sodium21 claims
- Breo Ellipta20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $529.15
8 payments; by number, the most common kind was food and beverage; the largest payer was Aimmune Therapeutics, Inc. The 289 providers of this specialty with any payment received $7,101.54 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Regents OF The University OF California - UcsfSan Francisco, CA
- Steven Machtinger MD And Associates IncSan Mateo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven Barry Machtinger among 52 pediatric allergy/immunology physician records in California
Steven Barry Machtinger, MD is one of 52 pediatric allergy/immunology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 98% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1977 · median 1996 among the 26 with a school on file
- Record last updated2025 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0201X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Allergy/Immunology Physician providers in California
There are 52 pediatric allergy/immunology physician records in California.
All 52 in California → Every provider in San Francisco → Pediatric Allergy/Immunology Physician nationwide →
The 8 pediatric allergy/immunology physician records with the nearest ZIP codes
- Angela Chang, M.D.San Francisco, CA 941431518233808
- Laurence Cheng, MD, PHDSan Francisco, CA 941431164636593
- Morton Cowan, M.D.San Francisco, CA 941431053354456
- Matthew Kan, MD, PHDSan Francisco, CA 941431164884797
- Farhan MurshedSan Francisco, CA 941431164956702
- Gabriel Salinas Cisneros, MDSan Francisco, CA 941431548642911
- Jonathan Witonsky, M.D.San Francisco, CA 941431679005813
- Morna Dorsey, M.D.San Francisco, CA 941581487663019
Common questions
What is Steven Barry Machtinger, MD's NPI number?
Steven Barry Machtinger, MD's National Provider Identifier (NPI) is 1093719437, issued on Jun 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Steven Barry Machtinger, MD located?
The NPPES record lists a practice address at 450 Sutter St RM 933, San Francisco, CA, 94108. Phone: (415) 362-5443. Providers update this record themselves, so call before visiting.
How can I verify Steven Barry Machtinger, MD's license?
NPPES lists California license number G42041, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Steven Barry Machtinger, MD prescribe under Medicare Part D?
In 2024, Steven Barry Machtinger, MD had 404 Medicare Part D claims for 97 beneficiaries; the average among pediatric allergy/immunology physician prescribers was 259. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.