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Dr. Stephen C. Lazarus, MD
NPI1659324531
- Medicare services, 2023
- 74
- Part D claims, 2024
- 93
- Publications
- 109
- Clinical trials
- 4
- Industry payments
- $64
- Practice address
- 400 Parnassus Ave Mcb300, San Francisco, CA 94143-0810
- Practice phone
- Call (415) 476-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University Of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave)
Multi-specialty group site · San Francisco, California
Find Dr. Lazarus' professional email, personal email and mobile number
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Dr. Stephen C. Lazarus is an internist in San Francisco, California
Dr. Lazarus practices at University Of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave) in San Francisco, California.
Dr. Lazarus' NPI, 1659324531, was assigned on May 19, 2006. Dr. Lazarus graduated from UC Irvine School of Medicine in 1972. Dr. Lazarus' California license number on file is A25354.
NPI and contact details
- NPI
- 1659324531NPI Registry (opens in a new tab)
- NPI enumeration date
- May 19, 2006
- NPI status
- Active
- Practice phone
- (415) 476-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1972
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen C. Lazarus practices at 2 locations in San Francisco, California
Dr. Lazarus' primary practice is University of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave), at 400 Parnassus Ave Mcb300, San Francisco, CA 94143-0810. The practice phone is (415) 476-1000. The NPI Registry lists Dr. Lazarus' practice address as 505 Parnassus Ave, San Francisco, CA 94131.
- University of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave)Primary400 Parnassus Ave Mcb300, San Francisco, CA 94143-0810Phone(415) 476-1000
- NPI Registry address505 Parnassus Ave, San Francisco, CA 94131 · San Francisco CountyPhone(415) 353-2961
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Stephen C. Lazarus is affiliated with 2 sites of care and 3 medical groups
Dr. Lazarus' primary practice is University Of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave) in San Francisco, California. The medical group on file is UCSF Pediatrics. Dmand AI also links Dr. Lazarus to 2 more medical groups and 1 group practice or clinic, each named with a free account.
University Of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave)Primary
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Stephen C. Lazarus' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lazarus practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave) | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen C. Lazarus is one of 16,751 internists in California
Internal medicine is Dr. Lazarus' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Lazarus is board certified in internal medicine by the American Board of Internal Medicine. Dr. Lazarus has a license on file in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists asthma and chronic obstructive pulmonary disease (COPD) among the conditions Dr. Lazarus treats.
Internists near Dr. Lazarus
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Stephen C. Lazarus billed Medicare for 74 services in 2023
CMS data shows 74 Medicare services from Dr. Lazarus across 3 procedure codes in 2023, all of them office visits. Medicare paid $6,941 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202374
Paid by Medicare$6,941
Procedure codes3
Dr. Lazarus' Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1002023: 7426%
Dr. Lazarus compared with the California median for internists, 2023
- Dr. Lazarus
- California median
- Medicare services
- 74vs 36180% below
- Part D claims
- 46vs 42189% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Lazarus' most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Lazarus?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Lazarus and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen C. Lazarus wrote 93 Medicare Part D claims in 2024
In 2024, Dr. Lazarus wrote 93 Medicare Part D claims for 27 patients. 18% of them were for generic drugs. CMS names the drug for 46 of them, across 2 drugs with 11 or more claims each, at $13,900 in total drug cost. In 2023, CMS named 249 claims across 9 drugs.
Part D claims, 202493
Drugs named by CMS2
Total drug cost$13,900
Part D patients27
Dr. Lazarus' Part D claims by kind of drug, 2024
- Generic17 claims18%
- Brand-name76 claims82%
Dr. Lazarus' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2492024: 4682%
Drugs named by CMS: 2 in 2024, 9 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Stephen C. Lazarus has 109 publications on record
Dmand AI links 109 papers to Dr. Lazarus, published from 2008 to 2021. 2017 was the busiest year, with 5. The most frequent topics are Asthma, Dogs and Administration, Inhalation. Dr. Lazarus has published most often in Am J Respir Crit Care Med. Dr. Lazarus' most frequent co-authors are Stanley Szefler, MD, Robert F. Lemanske, MD and Homer A. Boushey, MD.
Papers109
Years published2008 to 2021
Dr. Lazarus' papers by year, 2012 to 2021
Topics Dr. Lazarus writes about most
- Asthma
- Dogs
- Administration, Inhalation
- Mast Cells
- Pulmonary Disease, Chronic Obstructive
- Forced Expiratory Volume
- Adrenal Cortex Hormones
- Albuterol
Dr. Lazarus' most frequent co-authors
- Stanley Szefler, MD29 shared papers
- Robert F. Lemanske, MD28 shared papers
- Homer A. Boushey, MD26 shared papers
Recent publications by Dr. Lazarus
Lancet Respir Med
GeographyMinority GroupsRandomized Controlled Trials as Topic
AsthmaExhalationNitric Oxide
Administration, InhalationAdrenal Cortex HormonesAsthma
See who Dr. Lazarus researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Lazarus works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Stephen C. Lazarus has worked on 4 clinical trials
Dmand AI links Dr. Lazarus to 4 clinical trials. Conditions studied include Pulmonary Disease, Chronic Obstructive, Lung Diseases, Obstructive and Smoking. University of Minnesota sponsors the most, 4.
Conditions in Dr. Lazarus' trials
- Pulmonary Disease, Chronic Obstructive
- Lung Diseases, Obstructive
- Smoking
Investigators on the most trials with Dr. Lazarus
Recent clinical trials with Dr. Lazarus
An Observational Study of Beta-Blocker Use in Patients With COPD and Acute MI (opens in a new tab)
Completed
Pulmonary Disease, Chronic ObstructiveLung Diseases, Obstructive
SmokingPulmonary Disease, Chronic ObstructiveSimvastatin
Pulmonary Disease, Chronic ObstructiveLung Diseases, ObstructiveMacrolide Antibiotic (Azithromycin)
Pulmonary Disease, Chronic ObstructiveLung Diseases, ObstructiveE-CylinderLightweight Cylinder
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Stephen C. Lazarus received $64 in industry payments from 2017 to 2025
CMS Open Payments shows 4 general payments to Dr. Lazarus from 2 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 78% of the total. Galderma Laboratories, L.P. paid the most, $50.
General payments to Dr. Lazarus by program year, 2017 to 2025
General payments to Dr. Lazarus by kind, 2017 to 2025
$64in total
- Food and beverage$5078%
- Education$1422%
Companies that paid Dr. Lazarus the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen C. Lazarus has 1 award and honors on record
Dmand AI lists 1 award for Dr. Lazarus, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Lazarus
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Stephen C. Lazarus graduated from UC Irvine School of Medicine
Dr. Lazarus graduated from UC Irvine School of Medicine in 1972.
- Medical school
- Board certified in internal medicine
- Board certified in pulmonary disease
Source: Dmand AI Professional Profile Data
Dr. Stephen C. Lazarus accepts plans from 7 insurance carriers
Dr. Lazarus is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Blue Cross and Blue Shield of Kansas City
Plan types Dr. Lazarus accepts, by number of carriers
- PPO6
- Medicare5
- HMO3
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Stephen C. Lazarus's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Stephen C. Lazarus
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Stephen C. Lazarus' NPI number?
Dr. Stephen C. Lazarus' NPI number is 1659324531. It was assigned on May 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen C. Lazarus?
Dr. Stephen C. Lazarus is an internist in San Francisco, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Stephen C. Lazarus practice?
Dr. Lazarus practices at 400 Parnassus Ave Mcb300, San Francisco, CA 94143-0810. Dr. Lazarus also practices at 505 Parnassus Ave, San Francisco, CA 94131. Dr. Lazarus' primary practice is University Of California San Francisco - Primary Care - San Francisco (400 Parnassus Ave) in San Francisco, California. Dmand AI also links Dr. Lazarus to 2 medical groups and 1 group practice or clinic.
What is Dr. Stephen C. Lazarus' office phone number?
The practice phone on file for Dr. Lazarus is (415) 476-1000.
What is Dr. Stephen C. Lazarus' medical license number?
Dr. Lazarus' California license number on file is A25354.
What medical group is Dr. Stephen C. Lazarus part of?
Dr. Lazarus is linked to UCSF Pediatrics. Dmand AI links Dr. Lazarus to 2 more medical groups.
Does Dr. Stephen C. Lazarus accept Medicare?
Yes. CMS data shows Dr. Lazarus billed Medicare for 74 services in 2023.
Is Dr. Stephen C. Lazarus board certified?
Yes. Dr. Lazarus is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Stephen C. Lazarus bill to Medicare?
In 2023, Dr. Lazarus' most billed Medicare services were office visit, established patient (99214), office visit, established patient (99215) and office visit, new patient (99204).
Where did Dr. Stephen C. Lazarus go to medical school?
Dr. Lazarus graduated from UC Irvine School of Medicine in 1972.
Show 6 more questionsShow fewer questions
What drugs does Dr. Stephen C. Lazarus prescribe most?
In 2024 Medicare Part D data, Dr. Lazarus' most prescribed drugs by claims were Albuterol Sulfate Hfa and Spiriva Respimat.
Has Dr. Stephen C. Lazarus received payments from drug or device companies?
CMS Open Payments shows $64 in general payments to Dr. Lazarus from 2 companies from 2017 to 2025. The largest total came from Galderma Laboratories, L.P.
How long has Dr. Stephen C. Lazarus been practicing?
Dr. Lazarus graduated from medical school in 1972, 54 years ago.
Does Dr. Stephen C. Lazarus do research?
Dmand AI links 109 publications to Dr. Lazarus, published from 2008 to 2021. Dr. Lazarus has worked on 4 clinical trials.
Who does Dr. Stephen C. Lazarus publish with?
Dr. Lazarus' most frequent co-authors are Stanley Szefler, MD (29 shared papers), Robert F. Lemanske, MD (28 shared papers) and Homer A. Boushey, MD (26 shared papers).
What insurance does Dr. Stephen C. Lazarus accept?
Dr. Lazarus is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 6. Check the plan with the practice before a visit.
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