Dr. Mark Adam Lassoff, MBA, MD, MPH
- Part D claims, 2024
- 1,250
- Hospital affiliations
- 1
- Industry payments
- $250
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 4760 W Sunset Blvd, Los Angeles, CA 90027
- Practice phone
- Call (323) 783-4011
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Southern California Permanente Medical Group
Los Angeles, California
Find Dr. Lassoff'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. Mark Adam Lassoff is a urologist in Los Angeles, California
Dr. Lassoff practices at Southern California Permanente Medical Group in Los Angeles, California.
Dr. Lassoff's NPI, 1760633549, was assigned on October 9, 2008. Dr. Lassoff graduated from Rutgers New Jersey Medical School in 2004. Dr. Lassoff holds California license 93400.
- NPI
- 1760633549NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8123150299
- NPI enumeration date
- October 9, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (323) 783-4011
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Adam Lassoff practices at Southern California Permanente Medical Group in Los Angeles, California
Dr. Lassoff's primary practice is Southern California Permanente Medical Group, at 4760 W Sunset Blvd, Los Angeles, CA 90027 in Los Angeles County. The practice phone is (323) 783-4011.
- Southern California Permanente Medical Group4760 W Sunset Blvd, Los Angeles, CA 90027 · Los Angeles CountyPhone(323) 783-4011
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark Adam Lassoff is affiliated with 3 sites of care and 1 medical group
Dr. Lassoff's primary practice is Southern California Permanente Medical Group in Los Angeles, California. Dr. Lassoff is also affiliated with Kaiser Permanente Los Angeles Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Lassoff to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark Adam Lassoff's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lassoff practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Southern California Permanente Medical Group | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Adam Lassoff is one of 1,395 urologists in California
Urology is Dr. Lassoff's primary specialty in the NPI Registry, under taxonomy code 208800000X. Dr. Lassoff is board certified in urology by the American Board of Urology. Dr. Lassoff is licensed in California.
Specialties and state licenses
- Urology, CaliforniaPrimary
Clinical focus
Dmand AI lists enlarged prostate and urinary endoscopy among the conditions Dr. Lassoff treats.
Urologists near Dr. Lassoff
Counts of urologists 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. Mark Adam Lassoff's patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Dr. Lassoff's median patient age at 67, with 31% women.
Dr. Lassoff's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women31%
- Men68%
Source: Dmand AI Patient Panel Data
Dr. Mark Adam Lassoff wrote 1,250 Medicare Part D claims in 2024
In 2024, Dr. Lassoff wrote 1,250 Medicare Part D claims for 356 patients. 98% of them were for generic drugs. CMS names the drug for 1,185 of them, across 9 drugs with 11 or more claims each, at $37,993 in total drug cost. In 2023, CMS named 1,147 claims across 9 drugs.
Dr. Lassoff's Part D claims by kind of drug, 2024
- Generic1,230 claims98%
- Brand-name and other20 claims2%
Dr. Lassoff's 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.
Drug classes CMS tracks in Dr. Lassoff's Part D claims, 2024
- Antibiotics3%38 of 1,250 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,1472024: 1,1853%
Drugs named by CMS: 9 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
How Dr. Mark Adam Lassoff takes part in Medicare
Dr. Lassoff accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Mark Adam Lassoff received $250 in industry payments from 2019 to 2025
CMS Open Payments shows 3 general payments to Dr. Lassoff from 2 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. Cook Medical LLC paid the most, $182.
General payments to Dr. Lassoff by program year, 2019 to 2025
Companies that paid Dr. Lassoff the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark Adam Lassoff has 1 award and honors on record
Dmand AI lists 1 award for Dr. Lassoff, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Lassoff
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Mark Adam Lassoff graduated from Rutgers New Jersey Medical School
Dr. Lassoff graduated from Rutgers New Jersey Medical School in 2004.
- Medical school
- Board certified in urology
Source: Dmand AI Professional Profile Data
Dr. Mark Adam Lassoff accepts plans from 2 insurance carriers
Dr. Lassoff is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Lassoff accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Mark Adam Lassoff'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (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. Mark Adam Lassoff
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. Mark Adam Lassoff's NPI number?
Dr. Mark Adam Lassoff's NPI number is 1760633549. It was assigned on October 9, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Adam Lassoff?
Dr. Mark Adam Lassoff is a urologist in Los Angeles, California. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. Mark Adam Lassoff practice?
Dr. Lassoff practices at 4760 W Sunset Blvd, Los Angeles, CA 90027. Dr. Lassoff's primary practice is Southern California Permanente Medical Group in Los Angeles, California. Dmand AI also links Dr. Lassoff to 1 group practice or clinic.
What is Dr. Mark Adam Lassoff's office phone number?
The practice phone on file for Dr. Lassoff is (323) 783-4011.
What is Dr. Mark Adam Lassoff's medical license number?
Dr. Lassoff holds California license 93400.
Which hospitals is Dr. Mark Adam Lassoff affiliated with?
Dr. Lassoff is affiliated with Kaiser Permanente Los Angeles Medical Center.
What medical group is Dr. Mark Adam Lassoff part of?
Dr. Lassoff is linked to Southern California Permanente Medical Group.
Does Dr. Mark Adam Lassoff accept Medicare?
Yes. CMS lists Dr. Lassoff as accepting Medicare assignment.
Is Dr. Mark Adam Lassoff board certified?
Yes. Dr. Lassoff is board certified in urology by the American Board of Urology.
Where did Dr. Mark Adam Lassoff go to medical school?
Dr. Lassoff graduated from Rutgers New Jersey Medical School in 2004.
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What drugs does Dr. Mark Adam Lassoff prescribe most?
In 2024 Medicare Part D data, Dr. Lassoff's most prescribed drugs by claims were Finasteride, Tamsulosin HCl and Terazosin HCl.
Has Dr. Mark Adam Lassoff received payments from drug or device companies?
CMS Open Payments shows $250 in general payments to Dr. Lassoff from 2 companies from 2019 to 2025. The largest total came from Cook Medical LLC.
How long has Dr. Mark Adam Lassoff been practicing?
Dr. Lassoff graduated from medical school in 2004, 22 years ago.
What insurance does Dr. Mark Adam Lassoff accept?
Dr. Lassoff is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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