Dr. Marissa L. Zobrist, MD
- Medicare services, 2024
- 1,099
- Medicare patients, 2024
- 619
- Part D claims, 2024
- 220
- Hospital affiliations
- 1
- Industry payments
- $146
- Practice address
- 2121 Santa Monica Blvd, Santa Monica, CA 90404
- Practice phone
- Call (310) 829-5511
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Zobrist's professional email, personal email and mobile number
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Dr. Marissa L. Zobrist is an emergency medicine physician in Santa Monica, California
Dr. Zobrist practices at Providence Saint John's Health Center in Santa Monica, California, part of Providence Health & Services.
Dr. Zobrist's NPI, 1033407382, was assigned on July 20, 2011. Dr. Zobrist graduated from Keck School of Medicine of USC in 2011. Dr. Zobrist holds California license A123446.
- NPI
- 1033407382NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8820215221
- NPI enumeration date
- July 20, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 829-5511
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marissa L. Zobrist practices at Providence Saint John's Health Center in Santa Monica, California
Dr. Zobrist's primary practice is Providence Saint John's Health Center, at 2121 Santa Monica Blvd, Santa Monica, CA 90404 in Los Angeles County. The practice phone is (310) 829-5511.
- Providence Saint John's Health Center2121 Santa Monica Blvd, Santa Monica, CA 90404 · Los Angeles CountyPhone(310) 829-5511
Source: Dmand AI Affiliation Data
Dr. Marissa L. Zobrist is affiliated with 5 sites of care and 5 medical groups
Dr. Zobrist's primary practice is Providence Saint John's Health Center in Santa Monica, California, part of Providence Health & Services. The medical group on file is Vituity. Dmand AI also links Dr. Zobrist to 4 more group practices and clinics and 4 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Marissa L. Zobrist's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zobrist practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence Saint John's Health Center | Available with a free account |
| +4 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Providence Health & Services and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Marissa L. Zobrist is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Zobrist's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Zobrist is board certified in emergency medicine by the American Board of Emergency Medicine. Dr. Zobrist is licensed in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Dr. Zobrist
Counts of emergency medicine physicians 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. Marissa L. Zobrist billed Medicare for 1,099 services in 2024
CMS data shows 1,099 Medicare services from Dr. Zobrist across 8 procedure codes in 2024, for 619 Medicare patients. Medicare paid $75,841 for them.
Dr. Zobrist's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 3842024: 55946%
- Office and hospital visits
- 2023: 3552024: 52347%
- Lab and pathology
- 2023: 02024: 17
Where Dr. Zobrist's Medicare services took place, 2024
- In an office676%
- In a facility1,03294%
Dr. Zobrist compared with the California median for emergency medicine physicians, 2024
- Dr. Zobrist
- California median
- Medicare services
- 1,099vs 2654.1 times
- Medicare patients
- 619vs 2432.5 times
- Part D claims
- 80vs 6229% above
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Zobrist's most billed Medicare procedure codes, 2024
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. Zobrist?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zobrist and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marissa L. Zobrist treated 619 Medicare patients in 2024, average age 78
CMS counts 619 Medicare patients who saw Dr. Zobrist in 2024. The largest group is 75 to 84, with 199 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 29% are also on Medicaid. Their average risk score is 2.00, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Zobrist's median patient age at 57, with 55% women.
Dr. Zobrist's Medicare patients by age, 2024
Dr. Zobrist's Medicare patients by sex, 2024
- Women35858%
- Men26142%
Chronic conditions among Dr. Zobrist's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Ischemic heart disease50%
- Mood disorders42%
- Anxiety39%
- Depression38%
- Diabetes36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zobrist's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marissa L. Zobrist wrote 220 Medicare Part D claims in 2024
In 2024, Dr. Zobrist wrote 220 Medicare Part D claims for 172 patients. 92% of them were for generic drugs. CMS names the drug for 80 of them, across 4 drugs with 11 or more claims each, at $379 in total drug cost. In 2023, CMS named 19 claims across 1 drug.
Dr. Zobrist's Part D claims by kind of drug, 2024
- Generic203 claims92%
- Brand-name and other17 claims8%
Dr. Zobrist'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. Zobrist's Part D claims, 2024
- Opioids6%13 of 220 claims
- Antibiotics38%83 of 220 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: 192024: 80321%
Drugs named by CMS: 4 in 2024, 1 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. Marissa L. Zobrist takes part in Medicare
Dr. Zobrist accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of nail tissue: 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. Marissa L. Zobrist received $146 in industry payments from 2017 to 2025
CMS Open Payments shows 6 general payments to Dr. Zobrist from 5 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $44.
General payments to Dr. Zobrist by program year, 2017 to 2025
Companies that paid Dr. Zobrist 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. Marissa L. Zobrist graduated from Keck School of Medicine of USC
Dr. Zobrist graduated from Keck School of Medicine of USC in 2011.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Marissa L. Zobrist accepts plans from 15 insurance carriers
Dr. Zobrist is in network with 15 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Elevance. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Aetna
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +7 more carriersWith a free account
Plan types Dr. Zobrist accepts, by number of carriers
- PPO10
- HMO6
- Medicare6
- EPO3
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Marissa L. Zobrist'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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)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)Doctors and Clinicians Utilization Data (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. Marissa L. Zobrist
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. Marissa L. Zobrist's NPI number?
Dr. Marissa L. Zobrist's NPI number is 1033407382. It was assigned on July 20, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Marissa L. Zobrist?
Dr. Marissa L. Zobrist is an emergency medicine physician in Santa Monica, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Marissa L. Zobrist practice?
Dr. Zobrist practices at 2121 Santa Monica Blvd, Santa Monica, CA 90404. Dr. Zobrist's primary practice is Providence Saint John's Health Center in Santa Monica, California, part of Providence Health & Services. Dmand AI also links Dr. Zobrist to 4 group practices and clinics and 4 medical groups.
What is Dr. Marissa L. Zobrist's office phone number?
The practice phone on file for Dr. Zobrist is (310) 829-5511.
What is Dr. Marissa L. Zobrist's medical license number?
Dr. Zobrist holds California license A123446.
Which hospitals is Dr. Marissa L. Zobrist affiliated with?
Dr. Zobrist practices at Providence Saint John's Health Center in Santa Monica, California.
What medical group is Dr. Marissa L. Zobrist part of?
Dr. Zobrist is linked to Vituity. Dmand AI links Dr. Zobrist to 4 more medical groups.
Does Dr. Marissa L. Zobrist accept Medicare?
Yes. CMS data shows Dr. Zobrist billed Medicare for 1,099 services in 2024, and Dr. Zobrist accepts Medicare assignment.
How many Medicare patients does Dr. Marissa L. Zobrist see?
CMS counts 619 Medicare patients who saw Dr. Zobrist in 2024, with an average age of 78.
Is Dr. Marissa L. Zobrist board certified?
Yes. Dr. Zobrist is board certified in emergency medicine by the American Board of Emergency Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Marissa L. Zobrist bill to Medicare?
In 2024, Dr. Zobrist's most billed Medicare services were heart test or procedure (93010), emergency department visit (99285) and critical care (99291).
Where did Dr. Marissa L. Zobrist go to medical school?
Dr. Zobrist graduated from Keck School of Medicine of USC in 2011.
What drugs does Dr. Marissa L. Zobrist prescribe most?
In 2024 Medicare Part D data, Dr. Zobrist's most prescribed drugs by claims were Cephalexin, Prednisone and Albuterol Sulfate Hfa.
Has Dr. Marissa L. Zobrist received payments from drug or device companies?
CMS Open Payments shows $146 in general payments to Dr. Zobrist from 5 companies from 2017 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Marissa L. Zobrist been practicing?
Dr. Zobrist graduated from medical school in 2011, 15 years ago.
What insurance does Dr. Marissa L. Zobrist accept?
Dr. Zobrist is in network with 15 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Elevance. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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