Dr. Mark E. Feinerman, MD
- Part D claims, 2024
- 570
- Hospital affiliations
- 1
- Industry payments
- $925
- Medical group
- 1
- Insurance carriers
- 1
- Practice address
- 696 Hampshire Rd, Westlake Village, CA 91361
- Practice phone
- Call (805) 413-7920
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
SSC of Westlake Village
Westlake Village, California
Find Dr. Feinerman'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 E. Feinerman is a gastroenterologist in Westlake Village, California
Dr. Feinerman practices at SSC of Westlake Village in Westlake Village, California.
Dr. Feinerman's NPI, 1790833754, was assigned on January 8, 2007. Dr. Feinerman graduated from David Geffen School of Medicine at UCLA in 1979. Dr. Feinerman holds California license G43884.
- NPI
- 1790833754NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0648217075
- NPI enumeration date
- January 8, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (805) 413-7920
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 73
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark E. Feinerman practices at SSC of Westlake Village in Westlake Village, California
Dr. Feinerman's primary practice is SSC of Westlake Village, at 696 Hampshire Rd, Westlake Village, CA 91361 in Ventura County. The practice phone is (805) 413-7920.
- SSC of Westlake Village696 Hampshire Rd, Westlake Village, CA 91361 · Ventura CountyPhone(805) 413-7920
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark E. Feinerman is affiliated with 2 sites of care and 1 medical group
Dr. Feinerman's primary practice is SSC of Westlake Village in Westlake Village, California. Dr. Feinerman is also affiliated with Kaiser Permanente Woodland Hills Medical Center. The medical group on file is Southern California Permanente Medical Group.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark E. Feinerman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Feinerman practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSC of Westlake Village | 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. Mark E. Feinerman is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Feinerman's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Feinerman is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Feinerman is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Feinerman
Counts of gastroenterologists 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 E. Feinerman's patients have a median age of 61
Across all payers, Dmand AI patient panel data puts Dr. Feinerman's median patient age at 61, with 51% women.
Dr. Feinerman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women51%
- Men49%
Source: Dmand AI Patient Panel Data
Dr. Mark E. Feinerman wrote 570 Medicare Part D claims in 2024
In 2024, Dr. Feinerman wrote 570 Medicare Part D claims for 247 patients. 85% of them were for generic drugs. CMS names the drug for 435 of them, across 15 drugs with 11 or more claims each, at $91,955 in total drug cost. In 2023, CMS named 682 claims across 17 drugs.
Dr. Feinerman's Part D claims by kind of drug, 2024
- Generic485 claims85%
- Brand-name85 claims15%
Dr. Feinerman'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. Feinerman's Part D claims, 2024
- Antibiotics7%38 of 570 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: 6822024: 43536%
Drugs named by CMS: 15 in 2024, 17 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
Dr. Mark E. Feinerman offers telehealth to Medicare patients
Dr. Feinerman accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Feinerman as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Mark E. Feinerman received $925 in industry payments from 2016 to 2022
CMS Open Payments shows 8 general payments to Dr. Feinerman from 5 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $317.
General payments to Dr. Feinerman by program year, 2016 to 2022
Companies that paid Dr. Feinerman the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark E. Feinerman graduated from David Geffen School of Medicine at UCLA
Dr. Feinerman graduated from David Geffen School of Medicine at UCLA in 1979.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Mark E. Feinerman accepts plans from 1 insurance carrier
Dr. Feinerman is in network with 1 carrier, including Kaiser Permanente. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
Plan types Dr. Feinerman accepts, by number of carriers
- EPO1
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Mark E. Feinerman'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 DataDmand AI Org Hierarchy 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) |
| 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 E. Feinerman
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 E. Feinerman's NPI number?
Dr. Mark E. Feinerman's NPI number is 1790833754. It was assigned on January 8, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark E. Feinerman?
Dr. Mark E. Feinerman is a gastroenterologist in Westlake Village, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Mark E. Feinerman practice?
Dr. Feinerman practices at 696 Hampshire Rd, Westlake Village, CA 91361. Dr. Feinerman's primary practice is SSC of Westlake Village in Westlake Village, California.
What is Dr. Mark E. Feinerman's office phone number?
The practice phone on file for Dr. Feinerman is (805) 413-7920.
What is Dr. Mark E. Feinerman's medical license number?
Dr. Feinerman holds California license G43884.
Which hospitals is Dr. Mark E. Feinerman affiliated with?
Dr. Feinerman is affiliated with Kaiser Permanente Woodland Hills Medical Center.
What medical group is Dr. Mark E. Feinerman part of?
Dr. Feinerman is linked to Southern California Permanente Medical Group.
Does Dr. Mark E. Feinerman accept Medicare?
Yes. CMS lists Dr. Feinerman as accepting Medicare assignment.
Does Dr. Mark E. Feinerman offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Feinerman as offering telehealth services.
Is Dr. Mark E. Feinerman board certified?
Yes. Dr. Feinerman is board certified in gastroenterology by the American Board of Internal Medicine.
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Where did Dr. Mark E. Feinerman go to medical school?
Dr. Feinerman graduated from David Geffen School of Medicine at UCLA in 1979.
What drugs does Dr. Mark E. Feinerman prescribe most?
In 2024 Medicare Part D data, Dr. Feinerman's most prescribed drugs by claims were Gavilyte-C, Omeprazole and Mesalamine.
Has Dr. Mark E. Feinerman received payments from drug or device companies?
CMS Open Payments shows $925 in general payments to Dr. Feinerman from 5 companies from 2016 to 2022. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Mark E. Feinerman been practicing?
Dr. Feinerman graduated from medical school in 1979, 47 years ago.
What insurance does Dr. Mark E. Feinerman accept?
Dr. Feinerman is in network with 1 carrier, including Kaiser Permanente. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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