Dr. Steven Hyunjoon Yoo, DO
- Part D claims, 2022
- 23
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2012
- Practice address
- 1400 Computer Dr, Westborough, MA 01581
- Practice phone
- Call (657) 400-5180
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Landmark Medical Of Massachusetts - Westborough
Primary care practice · Westborough, Massachusetts
Find Dr. Yoo'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. Steven Hyunjoon Yoo is an internist in Westborough, Massachusetts
Dr. Yoo practices at Landmark Medical Of Massachusetts - Westborough in Westborough, Massachusetts.
Dr. Yoo's NPI, 1669736872, was assigned on July 2, 2012. Dr. Yoo holds Massachusetts license 269662.
- NPI
- 1669736872NPI Registry (opens in a new tab)
- NPI enumeration date
- July 2, 2012
- NPI status
- Active
- Practice phone
- (657) 400-5180
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Steven Hyunjoon Yoo practices at Landmark Medical of Massachusetts - Westborough in Westborough, Massachusetts
Dr. Yoo's primary practice is Landmark Medical of Massachusetts - Westborough, at 1400 Computer Dr, Westborough, MA 01581. The practice phone is (657) 400-5180.
- Landmark Medical of Massachusetts - Westborough1400 Computer Dr, Westborough, MA 01581Phone(657) 400-5180
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Steven Hyunjoon Yoo is affiliated with 1 site of care and 1 medical group
Dr. Yoo's primary practice is Landmark Medical Of Massachusetts - Westborough in Westborough, Massachusetts. The medical group on file is Landmark Health.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Steven Hyunjoon Yoo's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Yoo practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Landmark Medical Of Massachusetts - Westborough | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Steven Hyunjoon Yoo is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Yoo's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Yoo is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Yoo
Counts of internists 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. Steven Hyunjoon Yoo's patients have a median age of 84
Across all payers, Dmand AI patient panel data puts Dr. Yoo's median patient age at 84, with 100% women.
Dr. Yoo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 84
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. Steven Hyunjoon Yoo wrote 23 Medicare Part D claims in 2022
In 2022, Dr. Yoo wrote 23 Medicare Part D claims. Every claim was for a generic drug. They cover 2 drugs, with $812 in total drug cost. In 2021, CMS named 26 claims across 2 drugs.
Dr. Yoo's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 262022: 2312%
Drugs named by CMS: 2 in 2022, 2 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Sources for Dr. Steven Hyunjoon Yoo'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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) |
| 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. Steven Hyunjoon Yoo
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. Steven Hyunjoon Yoo's NPI number?
Dr. Steven Hyunjoon Yoo's NPI number is 1669736872. It was assigned on July 2, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Steven Hyunjoon Yoo?
Dr. Steven Hyunjoon Yoo is an internist in Westborough, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Steven Hyunjoon Yoo practice?
Dr. Yoo practices at 1400 Computer Dr, Westborough, MA 01581. Dr. Yoo's primary practice is Landmark Medical Of Massachusetts - Westborough in Westborough, Massachusetts.
What is Dr. Steven Hyunjoon Yoo's office phone number?
The practice phone on file for Dr. Yoo is (657) 400-5180.
What is Dr. Steven Hyunjoon Yoo's medical license number?
Dr. Yoo holds Massachusetts license 269662.
What medical group is Dr. Steven Hyunjoon Yoo part of?
Dr. Yoo is linked to Landmark Health.
What drugs does Dr. Steven Hyunjoon Yoo prescribe most?
In 2022 Medicare Part D data, Dr. Yoo's most prescribed drugs by claims were Oxybutynin Chloride and Buspirone HCl.
How long has Dr. Steven Hyunjoon Yoo been practicing?
Dr. Yoo's NPI was assigned in 2012.
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