NPI registry status
Active
2026 NPPES data Pediatrics Physician NPI 1093719437 MD
Verify on CMS → Steven Machtinger, MD
Pediatrics Physician in San Francisco, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 80,576 in Pediatrics Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
463
Medicare Part D claims · 104 beneficiaries · Pediatrics Physician avg: 762
Generic prescribing
0%
generic claims · 57% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$529.15
8 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Steven Machtinger, MD filed 463 Medicare Part D claims in 2023 as a Pediatrics Physician in San Francisco, California, prescribing 0% generic.
- 463
- Part D claims, 2023
- 0%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥62nd
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Steven Machtinger, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
463 ≥ 62nd percentile 62% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Steven Machtinger, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Steven Machtinger, MD?
Quality data not reportedPrimary specialty
Pediatrics Physician
Medicare Part D claims
463 39% vs specialty avg
Specialty distribution in California
How Pediatrics Physician compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Pediatrics Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Steven Machtinger, MD appears in the CMS NPPES registry as a Pediatrics Physician provider holding MD credentials at 450 SUTTER ST RM 933, San Francisco, CA, 94108, with a listed phone of (415) 362-5443. NPI 1093719437 was issued on 06/13/2005.
Medicare Part D records for calendar year 2023 show 463 prescription claims written by this provider, covering 104 Medicare beneficiaries and totaling roughly $404K in drug spend, split 57% brand-name and 0% generic by claim count.
Pediatrics Physician is a high-volume specialty nationwide, with 80,576 enrolled providers across 56 states and an average of 762 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1093719437 |
|---|---|
| Specialty | Pediatrics Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/13/2005 |
Hospital and facility affiliations
Facilities where Steven Machtinger, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Regents OF The University OF California - Ucsf
San Francisco, CA
Steven Machtinger MD And Associates Inc
San Mateo, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Steven Machtinger, MD. Source: openpaymentsdata.cms.gov.
Total received
$529
Largest payer
AIMMUNE THERAPEUTICS, INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Steven Machtinger, MD. To verify Steven Machtinger, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Brand-heavy
Steven Machtinger, MD - brand share 57.0%
Pediatrics Physician average
57% brand-name claims vs 0% generic, on 463 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
463
Total Claims
$404K
Total Drug Cost
104
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 708
- Total Day Supply
- 19,195
- Brand vs Generic
- 57% brand / 0% generic
- Brand Drug Cost
- $388K
- Antibiotic Claims
- 41
Patient Demographics
- Average Patient Age
- 74.0 years
- Avg HCC Risk Score
- 0.84
- Gender Split
- 68% female / 32% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Steven Machtinger, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Nucala
Nucala
42 claims
- Montelukast Sodium
Montelukast Sodium
33 claims
- Dupixent Pen
Dupixent Pen
28 claims
- Breo Ellipta
Breo Ellipta
27 claims
- Trelegy Ellipta
Trelegy Ellipta
27 claims
- Symbicort
Symbicort
25 claims
- Ipratropium Bromide
Ipratropium Bromide
21 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
20 claims
| Drug | Claims |
|---|---|
| Nucala Mepolizumab | 42 |
| Montelukast Sodium | 33 |
| Dupixent Pen Dupilumab | 28 |
| Breo Ellipta Fluticasone/Vilanterol | 27 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 27 |
| Symbicort Budesonide/Formoterol Fumarate | 25 |
| Ipratropium Bromide | 21 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 20 |
| Epinephrine | 20 |
| Spiriva Respimat Tiotropium Bromide | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pediatrics Physician Overview
How Steven Machtinger, MD fits within the Pediatrics Physician landscape nationally.
80,576
Pediatrics Physician Providers in US
56
States with Pediatrics Physician
762
Avg Claims per Provider
Steven Machtinger, MD's 463 claims are below the specialty average of 762.
Nearby Pediatrics Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Machtinger.
Dr. Subha Aahlad
M.D.
Foster City, CA
Dr. Rebecca Aaronson
MD
Panorama City, CA
Dr. Gregorio Abad-Santos
M.D.
Long Beach, CA
Dr. Michelle Abajian
MD
La Canada, CA
Dr. Joseph Abapo
MD
Riverside, CA
Compare Pediatrics Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Pediatrics Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore California
Frequently Asked Questions
What is Steven Machtinger, MD's specialty? ▼
Steven Machtinger, MD specializes in Pediatrics Physician and practices in San Francisco, California. Credentials: MD.
How much does Steven Machtinger, MD prescribe under Medicare Part D? ▼
In 2023, Steven Machtinger, MD wrote 463 Medicare Part D claims totaling $404K in drug costs for 104 beneficiaries.
Where is Steven Machtinger, MD located? ▼
Steven Machtinger, MD is located at 450 SUTTER ST RM 933, San Francisco, CA, 94108. Phone: (415) 362-5443.
What is Steven Machtinger, MD's NPI number? ▼
Steven Machtinger, MD's National Provider Identifier (NPI) is 1093719437, issued on 06/13/2005.
Does Steven Machtinger, MD prescribe more brand-name or generic drugs? ▼
Steven Machtinger, MD's prescribing is 57% brand-name and 0% generic drugs by claim count, with $388K in brand drug costs.
How many Pediatrics Physician providers are there in the US? ▼
There are 80,576 Pediatrics Physician providers across 56 states in the US. The average Pediatrics Physician provider writes 762 Medicare Part D claims per year.
What drugs does Steven Machtinger, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Steven Machtinger, MD's most frequently prescribed drugs include Nucala, Montelukast Sodium, Dupixent Pen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Steven Machtinger, MD accept Medicare? ▼
Steven Machtinger, MD appears in CMS Medicare data with 463 Part D claims and 104 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Steven Machtinger, MD's credentials? ▼
Steven Machtinger, MD's NPI is 1093719437 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.