Dr. Marisa Tienyun Smith, MD
- Medicare services, 2024
- 277
- Medicare patients, 2024
- 276
- Part D claims, 2024
- 50
- MIPS score, 2024
- 89
- Hospital affiliations
- 3
- Practice address
- 4077 5th Ave, San Diego, CA 92103
- Practice phone
- Call (619) 294-8111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Smith's professional email, personal email and mobile number
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Dr. Marisa Tienyun Smith is an emergency medicine physician in San Diego, California
Dr. Smith practices at Scripps Mercy Hospital San Diego in San Diego, California, part of Scripps Health.
Dr. Smith's NPI, 1447756259, was assigned on April 2, 2018. Dr. Smith graduated from Boonshoft School of Medicine in 2018. Dr. Smith holds California license A185755.
- NPI
- 1447756259NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7315296399
- NPI enumeration date
- April 2, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (619) 294-8111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marisa Tienyun Smith practices at Scripps Mercy Hospital San Diego in San Diego, California
Dr. Smith's primary practice is Scripps Mercy Hospital San Diego, at 4077 5th Ave, San Diego, CA 92103 in San Diego County. The practice phone is (619) 294-8111.
- Scripps Mercy Hospital San Diego4077 5th Ave, San Diego, CA 92103 · San Diego CountyPhone(619) 294-8111
Source: Dmand AI Affiliation Data
Dr. Marisa Tienyun Smith is affiliated with 6 sites of care and 3 medical groups
Dr. Smith's primary practice is Scripps Mercy Hospital San Diego in San Diego, California, part of Scripps Health. Dr. Smith is also affiliated with Hillcrest Medical Center. The medical group on file is UC San Diego Health. Dmand AI also links Dr. Smith to 1 more hospital, 3 group practices and clinics and 2 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. Marisa Tienyun Smith's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Smith practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Scripps Mercy Hospital San Diego | Available with a free account |
| +5 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marisa Tienyun Smith is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Smith's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Smith is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Smith's licenses on file in 2 states: California and Massachusetts.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
- Massachusetts license
Emergency medicine physicians near Dr. Smith
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. Marisa Tienyun Smith billed Medicare for 277 services in 2024
CMS data shows 277 Medicare services from Dr. Smith across 5 procedure codes in 2024, for 276 Medicare patients. Medicare paid $34,997 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Smith's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1122024: 256129%
- Tests and treatments
- 2023: 02024: 21
Dr. Smith compared with the California median for emergency medicine physicians, 2024
- Dr. Smith
- California median
- Medicare services
- 277vs 265Close to median
- Medicare patients
- 276vs 24314% above
- Part D claims
- 11vs 6282% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Smith'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Smith 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. Marisa Tienyun Smith treated 276 Medicare patients in 2024, average age 75
CMS counts 276 Medicare patients who saw Dr. Smith in 2024. The largest group is 75 to 84, with 106 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 34% are also on Medicaid. Their average risk score is 2.39, 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. Smith's median patient age at 49, with 50% women.
Dr. Smith's Medicare patients by age, 2024
Dr. Smith's Medicare patients by sex, 2024
- Women15054%
- Men12646%
Chronic conditions among Dr. Smith's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis39%
- Ischemic heart disease39%
- Chronic kidney disease37%
- Diabetes37%
- Anxiety34%
- Mood disorders33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Smith's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marisa Tienyun Smith wrote 50 Medicare Part D claims in 2024
In 2024, Dr. Smith wrote 50 Medicare Part D claims for 38 patients. 92% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $62 in total drug cost.
Dr. Smith's Part D claims by kind of drug, 2024
- Generic46 claims92%
- Brand-name and other4 claims8%
Dr. Smith'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.
Drug classes CMS tracks in Dr. Smith's Part D claims, 2024
- Antibiotics28%14 of 50 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
Dr. Marisa Tienyun Smith scored 89 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Smith for performance year 2024, reported as part of a group. Dr. Smith accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Smith's MIPS scores, performance year 2024
- 89of 100Final score
- 87.1of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 70of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Marisa Tienyun Smith received $16 in industry payments in 2021
CMS Open Payments shows 1 general payment to Dr. Smith from 1 drug or device company in 2021. Food and beverage make up the largest share, 100% of the total. GlaxoSmithKline, LLC. paid the most, $16.
Companies that paid Dr. Smith the most, 2021 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Marisa Tienyun Smith graduated from Boonshoft School of Medicine
Dr. Smith graduated from Boonshoft School of Medicine in 2018.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Marisa Tienyun Smith accepts plans from 1 insurance carrier
Dr. Smith is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Marisa Tienyun Smith'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)Clinician Public Reporting: Overall MIPS Performance (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. Marisa Tienyun Smith
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. Marisa Tienyun Smith's NPI number?
Dr. Marisa Tienyun Smith's NPI number is 1447756259. It was assigned on April 2, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Marisa Tienyun Smith?
Dr. Marisa Tienyun Smith is an emergency medicine physician in San Diego, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Marisa Tienyun Smith practice?
Dr. Smith practices at 4077 5th Ave, San Diego, CA 92103. Dr. Smith's primary practice is Scripps Mercy Hospital San Diego in San Diego, California, part of Scripps Health. Dmand AI also links Dr. Smith to 1 hospital, 3 group practices and clinics and 2 medical groups.
What is Dr. Marisa Tienyun Smith's office phone number?
The practice phone on file for Dr. Smith is (619) 294-8111.
What is Dr. Marisa Tienyun Smith's medical license number?
Dr. Smith holds California license A185755, one of the licenses on file in 2 states.
Which states has Dr. Marisa Tienyun Smith been licensed in?
Dmand AI has state licenses on file for Dr. Smith in California (2023 to 2027) and Massachusetts (2018 to 2023).
Which hospitals is Dr. Marisa Tienyun Smith affiliated with?
Dr. Smith practices at Scripps Mercy Hospital San Diego in San Diego, California. Dr. Smith is also affiliated with Hillcrest Medical Center. Dmand AI links Dr. Smith to 1 more hospital.
What medical group is Dr. Marisa Tienyun Smith part of?
Dr. Smith is linked to UC San Diego Health. Dmand AI links Dr. Smith to 2 more medical groups.
Does Dr. Marisa Tienyun Smith accept Medicare?
Yes. CMS data shows Dr. Smith billed Medicare for 277 services in 2024, and Dr. Smith accepts Medicare assignment.
What is Dr. Marisa Tienyun Smith's MIPS score?
Dr. Smith's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. Marisa Tienyun Smith see?
CMS counts 276 Medicare patients who saw Dr. Smith in 2024, with an average age of 75.
Is Dr. Marisa Tienyun Smith board certified?
Yes. Dr. Smith is board certified in emergency medicine by the American Board of Emergency Medicine.
What services does Dr. Marisa Tienyun Smith bill to Medicare?
In 2024, Dr. Smith's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and heart test or procedure (93308).
Where did Dr. Marisa Tienyun Smith go to medical school?
Dr. Smith graduated from Boonshoft School of Medicine in 2018.
What drugs does Dr. Marisa Tienyun Smith prescribe most?
In 2019 Medicare Part D data, Dr. Smith's most prescribed drugs by claims were Oxycodone HCl.
Has Dr. Marisa Tienyun Smith received payments from drug or device companies?
CMS Open Payments shows $16 in general payments to Dr. Smith from 1 company from 2021 to 2021. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Marisa Tienyun Smith been practicing?
Dr. Smith graduated from medical school in 2018, 8 years ago.
What insurance does Dr. Marisa Tienyun Smith accept?
Dr. Smith is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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