Dr. Ruth Y. Peng, MD
- Medicare services, 2024
- 3,076
- Medicare patients, 2024
- 1,008
- MIPS score, 2024
- 79
- Hospital affiliations
- 1
- Industry payments
- $75
- Practice address
- 301 Saint Paul Place, Baltimore, MD 21202
- Practice phone
- Call (410) 332-9237
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Ruth Y. Peng is a pathologist in Baltimore, Maryland
Dr. Peng practices at Mercy Medical Center in Baltimore, Maryland, part of Mercy Medical Center.
Dr. Peng's NPI, 1891753638, was assigned on May 2, 2006. Dr. Peng graduated from Albert Einstein College of Medicine of Yeshiva University in 1999. Dr. Peng holds Wisconsin license 48345.
- NPI
- 1891753638NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274568605
- NPI enumeration date
- May 2, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (410) 332-9237
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ruth Y. Peng practices at Mercy Medical Center in Baltimore, Maryland
Dr. Peng's primary practice is Mercy Medical Center, at 301 Saint Paul Place, Baltimore, MD 21202 in Baltimore City. The practice phone is (410) 332-9237.
- Mercy Medical Center301 Saint Paul Place, Baltimore, MD 21202 · Baltimore CityPhone(410) 332-9237
Source: Dmand AI Affiliation Data
Dr. Ruth Y. Peng is affiliated with 2 sites of care and 1 medical group
Dr. Peng's primary practice is Mercy Medical Center in Baltimore, Maryland, part of Mercy Medical Center. The medical group on file is Mercy Personal Physicians Downtown. Dmand AI also links Dr. Peng to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ruth Y. Peng's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Peng practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy 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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Dr. Ruth Y. Peng is one of 194 pathologists in Maryland
Anatomic pathology and clinical pathology is Dr. Peng's primary specialty in the NPI Registry, under taxonomy code 207ZP0102X. Dr. Peng is licensed in Wisconsin.
Specialties and state licenses
- Anatomic pathology and clinical pathology, WisconsinPrimary
Pathologists near Dr. Peng
Counts of pathologists 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. Ruth Y. Peng billed Medicare for 3,076 services in 2024
CMS data shows 3,076 Medicare services from Dr. Peng across 17 procedure codes in 2024, for 1,008 Medicare patients. Medicare paid $105,466 for them.
Dr. Peng's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 3,3452024: 3,0768%
Where Dr. Peng's Medicare services took place, 2024
- In an office41914%
- In a facility2,65786%
Dr. Peng compared with the Maryland median for pathologists, 2024
- Dr. Peng
- Maryland median
- Medicare services
- 3,076vs 1,2642.4 times
- Medicare patients
- 1,008vs 60666% above
Medians across 198 pathologists in Maryland with Dmand AI profiles that report each measure.
Dr. Peng'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. Peng and other pathologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ruth Y. Peng treated 1,008 Medicare patients in 2024, average age 72
CMS counts 1,008 Medicare patients who saw Dr. Peng in 2024. The largest group is 65 to 74, with 543 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 12% are also on Medicaid. Their average risk score is 1.17, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Peng's median patient age at 60, with 61% women.
Dr. Peng's Medicare patients by age, 2024
Dr. Peng's Medicare patients by sex, 2024
- Women62862%
- Men38038%
Chronic conditions among Dr. Peng's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Diabetes33%
- Cancer32%
- Anxiety26%
- Ischemic heart disease25%
- Mood disorders25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Peng's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women61%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ruth Y. Peng scored 79 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 79 out of 100 for Dr. Peng for performance year 2024, reported as part of a group. Dr. Peng accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Peng's MIPS scores, performance year 2024
- 79of 100Final score
- 56.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 74of 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. Ruth Y. Peng received $75 in industry payments from 2016 to 2023
CMS Open Payments shows 5 general payments to Dr. Peng from 4 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. Roche Diagnostics Corporation paid the most, $41.
General payments to Dr. Peng by program year, 2016 to 2023
Companies that paid Dr. Peng the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ruth Y. Peng graduated from Albert Einstein College of Medicine of Yeshiva University
Dr. Peng graduated from Albert Einstein College of Medicine of Yeshiva University in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ruth Y. Peng'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) |
| 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 |
| 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. Ruth Y. Peng
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What is Dr. Ruth Y. Peng's NPI number?
Dr. Ruth Y. Peng's NPI number is 1891753638. It was assigned on May 2, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Ruth Y. Peng?
Dr. Ruth Y. Peng is a pathologist in Baltimore, Maryland. The primary specialty in the NPI Registry is Anatomic Pathology & Clinical Pathology Physician (taxonomy code 207ZP0102X).
Where does Dr. Ruth Y. Peng practice?
Dr. Peng practices at 301 Saint Paul Place, Baltimore, MD 21202. Dr. Peng's primary practice is Mercy Medical Center in Baltimore, Maryland, part of Mercy Medical Center. Dmand AI also links Dr. Peng to 1 group practice or clinic.
What is Dr. Ruth Y. Peng's office phone number?
The practice phone on file for Dr. Peng is (410) 332-9237.
What is Dr. Ruth Y. Peng's medical license number?
Dr. Peng holds Wisconsin license 48345.
Which hospitals is Dr. Ruth Y. Peng affiliated with?
Dr. Peng practices at Mercy Medical Center in Baltimore, Maryland.
What medical group is Dr. Ruth Y. Peng part of?
Dr. Peng is linked to Mercy Personal Physicians Downtown.
Does Dr. Ruth Y. Peng accept Medicare?
Yes. CMS data shows Dr. Peng billed Medicare for 3,076 services in 2024, and Dr. Peng accepts Medicare assignment.
What is Dr. Ruth Y. Peng's MIPS score?
Dr. Peng's MIPS final score for performance year 2024 is 79 out of 100, reported as part of a group.
How many Medicare patients does Dr. Ruth Y. Peng see?
CMS counts 1,008 Medicare patients who saw Dr. Peng in 2024, with an average age of 72.
Show 4 more questionsShow fewer questions
What services does Dr. Ruth Y. Peng bill to Medicare?
In 2024, Dr. Peng's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88341) and lab and pathology test (88342).
Where did Dr. Ruth Y. Peng go to medical school?
Dr. Peng graduated from Albert Einstein College of Medicine of Yeshiva University in 1999.
Has Dr. Ruth Y. Peng received payments from drug or device companies?
CMS Open Payments shows $75 in general payments to Dr. Peng from 4 companies from 2016 to 2023. The largest total came from Roche Diagnostics Corporation.
How long has Dr. Ruth Y. Peng been practicing?
Dr. Peng graduated from medical school in 1999, 27 years ago.
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