Dr. Emma Claire Marcus, DO
- Part D claims, 2024
- 264
- Hospital affiliations
- 2
- Industry payments
- $15
- State license
- 1
- Year NPI issued
- 2023
- Practice address
- 1400 E Church St, Santa Maria, CA 93454
- Practice phone
- Call (805) 739-3100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Marcus' 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. Emma Claire Marcus is a family medicine physician in Santa Maria, California
Dr. Marcus practices at Dignity Health - Marian Regional Medical Center in Santa Maria, California, part of CommonSpirit Health.
Dr. Marcus' NPI, 1952006124, was assigned on April 4, 2023. Dr. Marcus graduated from Touro University California - Vallejo in 2023. Dr. Marcus holds California license 20A23146.
- NPI
- 1952006124NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6406379890
- NPI enumeration date
- April 4, 2023
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 739-3100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Medical school graduation
- 2023
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Emma Claire Marcus practices at Dignity Health - Marian Regional Medical Center in Santa Maria, California
Dr. Marcus' primary practice is Dignity Health - Marian Regional Medical Center, at 1400 E Church St, Santa Maria, CA 93454 in Santa Barbara County. The practice phone is (805) 739-3100.
- Dignity Health - Marian Regional Medical Center1400 E Church St, Santa Maria, CA 93454 · Santa Barbara CountyPhone(805) 739-3100
Source: Dmand AI Affiliation Data
Dr. Emma Claire Marcus is affiliated with 2 sites of care
Dr. Marcus' primary practice is Dignity Health - Marian Regional Medical Center in Santa Maria, California, part of CommonSpirit Health. Dmand AI also links Dr. Marcus to 1 hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Emma Claire Marcus' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marcus practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - Marian Regional Medical Center | Available with a free account |
| +1 more affiliated site | 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 CommonSpirit Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Emma Claire Marcus is one of 15,680 family medicine physicians in California
Family medicine is Dr. Marcus' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Marcus is board certified in 2024 - 2026 by the CA State License. Dr. Marcus is licensed in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Family medicine physicians near Dr. Marcus
Counts of family 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. Emma Claire Marcus' patients have a median age of 56
Across all payers, Dmand AI patient panel data puts Dr. Marcus' median patient age at 56, with 75% women.
Dr. Marcus' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women75%
- Men25%
Source: Dmand AI Patient Panel Data
Dr. Emma Claire Marcus wrote 264 Medicare Part D claims in 2024
In 2024, Dr. Marcus wrote 264 Medicare Part D claims for 59 patients. 74% of them were for generic drugs. CMS names the drug for 67 of them, across 5 drugs with 11 or more claims each, at $11,289 in total drug cost.
Dr. Marcus' Part D claims by kind of drug, 2024
- Generic195 claims74%
- Brand-name and other69 claims26%
Dr. Marcus' 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. Marcus' Part D claims, 2024
- Antibiotics6%17 of 264 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Emma Claire Marcus takes part in Medicare
Dr. Marcus 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. Emma Claire Marcus received $15 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Marcus from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Immunitybio, Inc. paid the most, $15.
Companies that paid Dr. Marcus the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Emma Claire Marcus graduated from Touro University California - Vallejo
Dr. Marcus graduated from Touro University California - Vallejo in 2023.
- Medical school
- Board certified in 2024 - 2026
Source: Dmand AI Professional Profile Data
Sources for Dr. Emma Claire Marcus'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 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 |
| 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. Emma Claire Marcus
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. Emma Claire Marcus' NPI number?
Dr. Emma Claire Marcus' NPI number is 1952006124. It was assigned on April 4, 2023, and it is active in the NPI Registry.
What kind of doctor is Dr. Emma Claire Marcus?
Dr. Emma Claire Marcus is a family medicine physician in Santa Maria, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Emma Claire Marcus practice?
Dr. Marcus practices at 1400 E Church St, Santa Maria, CA 93454. Dr. Marcus' primary practice is Dignity Health - Marian Regional Medical Center in Santa Maria, California, part of CommonSpirit Health. Dmand AI also links Dr. Marcus to 1 hospital.
What is Dr. Emma Claire Marcus' office phone number?
The practice phone on file for Dr. Marcus is (805) 739-3100.
What is Dr. Emma Claire Marcus' medical license number?
Dr. Marcus holds California license 20A23146.
Which hospitals is Dr. Emma Claire Marcus affiliated with?
Dr. Marcus practices at Dignity Health - Marian Regional Medical Center in Santa Maria, California. Dmand AI links Dr. Marcus to 1 more hospital.
Does Dr. Emma Claire Marcus accept Medicare?
Yes. CMS lists Dr. Marcus as accepting Medicare assignment.
Is Dr. Emma Claire Marcus board certified?
Yes. Dr. Marcus is board certified in 2024 - 2026 by the CA State License.
Where did Dr. Emma Claire Marcus go to medical school?
Dr. Marcus graduated from Touro University California - Vallejo in 2023.
What drugs does Dr. Emma Claire Marcus prescribe most?
In 2024 Medicare Part D data, Dr. Marcus' most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Rosuvastatin Calcium.
Has Dr. Emma Claire Marcus received payments from drug or device companies?
CMS Open Payments shows $15 in general payments to Dr. Marcus from 1 company from 2024 to 2024. The largest total came from Immunitybio, Inc.
How long has Dr. Emma Claire Marcus been practicing?
Dr. Marcus graduated from medical school in 2023, 3 years ago.
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