AdenocarcinomaAge DistributionCell Transformation, Neoplastic
Dr. Stephen D. Duffy, MD
NPI1073763447PAC ID1456406461
- Medicare services, 2019
- 130
- Medicare patients, 2024
- 18
- Part D claims, 2019
- 63
- Publications
- 1
- Clinical trials
- 1
- Practice address
- 1044 S Fair Oaks Ave, Pasadena, CA 91105
- Practice phone
- Call (626) 768-4422
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Pasadena Advanced Surgery Institute
Pasadena, California
Find Dr. Duffy's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Stephen D. Duffy is a plastic surgeon in Pasadena, California
Dr. Duffy practices at Pasadena Advanced Surgery Institute in Pasadena, California.
Dr. Duffy's NPI, 1073763447, was assigned on September 23, 2008. Dr. Duffy graduated from Icahn School Of Medicine At Mount Sinai in 2002. Dr. Duffy's South Carolina license number on file is 31460.
NPI and contact details
- NPI
- 1073763447NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1456406461
- NPI enumeration date
- September 23, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (626) 768-4422
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen D. Duffy practices at Pasadena Advanced Surgery Institute in Pasadena, California
Dr. Duffy's primary practice is Pasadena Advanced Surgery Institute, at 1044 S Fair Oaks Ave, Pasadena, CA 91105 in Los Angeles County. The practice phone is (626) 768-4422.
- Pasadena Advanced Surgery Institute1044 S Fair Oaks Ave, Pasadena, CA 91105 · Los Angeles CountyPhone(626) 768-4422
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stephen D. Duffy is affiliated with 2 sites of care and 1 medical group
Dr. Duffy's primary practice is Pasadena Advanced Surgery Institute in Pasadena, California. The medical group on file is Premiere Plastic Surgery. Dmand AI also links Dr. Duffy to 1 more group practice or clinic, named with a free account.
Pasadena Advanced Surgery InstitutePrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Stephen D. Duffy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duffy practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Pasadena Advanced Surgery Institute | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen D. Duffy is one of 778 plastic surgeons in California
Plastic surgery is Dr. Duffy's primary specialty in the NPI Registry, under taxonomy code 208200000X. Dr. Duffy is board certified in plastic surgery by the American Board of Plastic Surgery. Dmand AI has Dr. Duffy's licenses on file in 2 states: South Carolina and California.
Specialties and state licenses
- Plastic surgery, South CarolinaPrimary
- California license
Plastic surgeons near Dr. Duffy
Counts of plastic surgeons 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 D. Duffy billed Medicare for 130 services in 2019
CMS data shows 130 Medicare services from Dr. Duffy across 5 procedure codes in 2019, for 18 Medicare patients. Medicare paid $20,164 for them.
Medicare services, 2019130
Medicare patients18
Paid by Medicare$20,164
Procedure codes5
Dr. Duffy's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 1392019: 10028%
- Surgery
- 2018: 522019: 3042%
Where Dr. Duffy's Medicare services took place, 2019
- In an office10077%
- In a facility3023%
Dr. Duffy compared with the California median for plastic surgeons, 2019
- Dr. Duffy
- California median
- Medicare services
- 130vs 582.2 times
- Medicare patients
- 18vs 5969% below
- Part D claims
- 63vs 262.4 times
Medians across 622 plastic surgeons in California with Dmand AI profiles that report each measure.
Dr. Duffy's most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Duffy and other plastic surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen D. Duffy treated 18 Medicare patients in 2024, average age 71
CMS counts 18 Medicare patients who saw Dr. Duffy in 2024. 72% of them have high blood pressure. Their average risk score is 1.38, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Duffy's median patient age at 51, with 75% women.
Medicare patients, 202418
Average age71
Average risk score1.38
Chronic conditions among Dr. Duffy's Medicare patients, 2024
- High blood pressure72%
Share of Medicare patients with each condition. A patient can have several.
Dr. Duffy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women75%
- Men24%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen D. Duffy wrote 63 Medicare Part D claims in 2019
In 2019, Dr. Duffy wrote 63 Medicare Part D claims. They cover 3 drugs, with $601 in total drug cost. In 2018, CMS named 120 claims across 4 drugs.
Part D claims, 201963
Drugs named by CMS3
Total drug cost$601
Dr. Duffy's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 1202019: 6348%
Drugs named by CMS: 3 in 2019, 4 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Stephen D. Duffy takes part in Medicare
Dr. Duffy accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Mastectomy: 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Stephen D. Duffy has 1 publication on record
Dmand AI links 1 paper to Dr. Duffy. Dr. Duffy's most frequent co-author is Vishal D. Ghevariya, MD.
Papers1
Dr. Duffy's most frequent co-authors
Recent publications by Dr. Duffy
See who Dr. Duffy researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Duffy works with, so you can find a warm path to the right plastic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Stephen D. Duffy has worked on 1 clinical trial
Dmand AI links Dr. Duffy to 1 clinical trial. Conditions studied include Sedentary Behavior and Intermittent Claudication.
Conditions in Dr. Duffy's trials
- Sedentary Behavior
- Intermittent Claudication
Recent clinical trials with Dr. Duffy
The Effects of Metformin on Functional Capacity in Individuals With Peripheral Artery Disease-Related Intermittent Claudication (opens in a new tab)
TerminatedPhase 4
Sedentary BehaviorIntermittent ClaudicationMetformin
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Stephen D. Duffy received $6,902 in industry payments from 2016 to 2025
CMS Open Payments shows 55 general payments to Dr. Duffy from 15 drug and device companies from 2016 to 2025. Gifts make up the largest share, 69% of the total. Allergan Inc. paid the most, $4,943.
General payments to Dr. Duffy by program year, 2016 to 2025
General payments to Dr. Duffy by kind, 2016 to 2025
$6.9Kin total
- Gifts$4,75469%
- Food and beverage$2,14831%
Companies that paid Dr. Duffy the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen D. Duffy graduated from Icahn School Of Medicine At Mount Sinai
Dr. Duffy graduated from Icahn School Of Medicine At Mount Sinai in 2002. Dr. Duffy is a member of ASPS.
- Medical school
- Board certified in plastic surgery
Source: Dmand AI Professional Profile Data
Dr. Stephen D. Duffy accepts plans from 8 insurance carriers
Dr. Duffy is in network with 8 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- LA Care
- Regence Health Plans
- CMS Medicare
- Humana
- Molina
Plan types Dr. Duffy accepts, by number of carriers
- Medicare7
- PPO4
- HMO3
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Stephen D. Duffy'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| 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 |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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) |
| 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 D. Duffy
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 D. Duffy's NPI number?
Dr. Stephen D. Duffy's NPI number is 1073763447. It was assigned on September 23, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen D. Duffy?
Dr. Stephen D. Duffy is a plastic surgeon in Pasadena, California. The primary specialty in the NPI Registry is Plastic Surgery Physician (taxonomy code 208200000X).
Where does Dr. Stephen D. Duffy practice?
Dr. Duffy practices at 1044 S Fair Oaks Ave, Pasadena, CA 91105. Dr. Duffy's primary practice is Pasadena Advanced Surgery Institute in Pasadena, California. Dmand AI also links Dr. Duffy to 1 group practice or clinic.
What is Dr. Stephen D. Duffy's office phone number?
The practice phone on file for Dr. Duffy is (626) 768-4422.
What is Dr. Stephen D. Duffy's medical license number?
Dr. Duffy's South Carolina license number on file is 31460, one of the licenses on file in 2 states.
Which states has Dr. Stephen D. Duffy been licensed in?
Dmand AI has state licenses on file for Dr. Duffy in South Carolina (2009 to 2021) and California (2019 to 2027).
What medical group is Dr. Stephen D. Duffy part of?
Dr. Duffy is linked to Premiere Plastic Surgery.
Does Dr. Stephen D. Duffy accept Medicare?
Yes. CMS data shows Dr. Duffy billed Medicare for 130 services in 2019, and Dr. Duffy accepts Medicare assignment.
How many Medicare patients does Dr. Stephen D. Duffy see?
CMS counts 18 Medicare patients who saw Dr. Duffy in 2024, with an average age of 71.
Is Dr. Stephen D. Duffy board certified?
Yes. Dr. Duffy is board certified in plastic surgery by the American Board of Plastic Surgery.
Show 8 more questionsShow fewer questions
What services does Dr. Stephen D. Duffy bill to Medicare?
In 2019, Dr. Duffy's most billed Medicare services were office visit, new patient (99203), office visit, established patient (99213) and surgery: skin and soft tissue (15823).
Where did Dr. Stephen D. Duffy go to medical school?
Dr. Duffy graduated from Icahn School Of Medicine At Mount Sinai in 2002.
What drugs does Dr. Stephen D. Duffy prescribe most?
In 2019 Medicare Part D data, Dr. Duffy's most prescribed drugs by claims were Oxycodone-Acetaminophen, Erythromycin and Levofloxacin.
Has Dr. Stephen D. Duffy received payments from drug or device companies?
CMS Open Payments shows $6,902 in general payments to Dr. Duffy from 15 companies from 2016 to 2025. The largest total came from Allergan Inc.
How long has Dr. Stephen D. Duffy been practicing?
Dr. Duffy graduated from medical school in 2002, 24 years ago.
Does Dr. Stephen D. Duffy do research?
Dmand AI links 1 publication to Dr. Duffy. Dr. Duffy has worked on 1 clinical trial.
Who does Dr. Stephen D. Duffy publish with?
Dr. Duffy's most frequent co-authors are Vishal D. Ghevariya, MD (1 shared paper).
What insurance does Dr. Stephen D. Duffy accept?
Dr. Duffy is in network with 8 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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