Dr. Kei Shing Oh, MD
- Medicare services, 2024
- 1,546
- Medicare patients, 2024
- 646
- Hospital affiliations
- 6
- Industry payments
- $778
- Medical group
- 1
- Practice address
- 1000 Fourth Street SW, Mason City, IA 50401
- Practice phone
- Call (641) 428-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Oh'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. Kei Shing Oh is a pathologist in Mason City, Iowa
Dr. Oh practices at MercyOne North Iowa Medical Center in Mason City, Iowa, part of Trinity Health.
Dr. Oh's NPI, 1356990279, was assigned on September 4, 2019. Dr. Oh holds Florida license TRN29708.
- NPI
- 1356990279NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0143689539
- NPI enumeration date
- September 4, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (641) 428-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kei Shing Oh practices at MercyOne North Iowa Medical Center in Mason City, Iowa
Dr. Oh's primary practice is MercyOne North Iowa Medical Center, at 1000 Fourth Street SW, Mason City, IA 50401 in Cerro Gordo County. The practice phone is (641) 428-7000.
- MercyOne North Iowa Medical Center1000 Fourth Street SW, Mason City, IA 50401 · Cerro Gordo CountyPhone(641) 428-7000
Source: Dmand AI Affiliation Data
Dr. Kei Shing Oh is affiliated with 7 sites of care and 1 medical group
Dr. Oh's primary practice is MercyOne North Iowa Medical Center in Mason City, Iowa, part of Trinity Health. Dr. Oh is also affiliated with Floyd County Medical Center. The medical group on file is Pathology Associates of Mason City. Dmand AI also links Dr. Oh to 4 more hospitals and 1 hospice, 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. Kei Shing Oh's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Oh practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MercyOne North Iowa Medical Center | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Trinity Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Kei Shing Oh is one of 86 pathologists in Iowa
Anatomic pathology and clinical pathology is Dr. Oh's primary specialty in the NPI Registry, under taxonomy code 207ZP0102X. Dr. Oh is licensed in Florida.
Specialties and state licenses
- Anatomic pathology and clinical pathology, FloridaPrimary
Pathologists near Dr. Oh
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. Kei Shing Oh billed Medicare for 1,546 services in 2024
CMS data shows 1,546 Medicare services from Dr. Oh across 12 procedure codes in 2024, for 646 Medicare patients. Medicare paid $41,008 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Oh compared with the Iowa median for pathologists, 2024
- Dr. Oh
- Iowa median
- Medicare services
- 1,546vs 1,6627% below
- Medicare patients
- 646vs 88927% below
Medians across 91 pathologists in Iowa with Dmand AI profiles that report each measure.
Dr. Oh'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. Oh?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Oh and other pathologists in Iowa.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kei Shing Oh treated 646 Medicare patients in 2024, average age 75
CMS counts 646 Medicare patients who saw Dr. Oh in 2024. The largest group is 65 to 74, with 316 patients. 75% of them have high cholesterol, and 74% have high blood pressure. 4% are also on Medicaid. Their average risk score is 0.98, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Oh's median patient age at 62, with 60% women.
Dr. Oh's Medicare patients by age, 2024
Dr. Oh's Medicare patients by sex, 2024
- Women33452%
- Men31248%
Chronic conditions among Dr. Oh's Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis39%
- Diabetes25%
- Cancer23%
- Ischemic heart disease23%
- Chronic kidney disease20%
- Mood disorders20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Oh's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Kei Shing Oh takes part in Medicare
Dr. Oh 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Kei Shing Oh received $778 in industry payments from 2019 to 2024
CMS Open Payments shows 10 general payments to Dr. Oh from 9 drug and device companies from 2019 to 2024. Food and beverage make up the largest share, 100% of the total. Genentech, Inc. paid the most, $144.
General payments to Dr. Oh by program year, 2019 to 2024
Companies that paid Dr. Oh the most, 2019 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Kei Shing Oh'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) |
| Industry payments | Open Payments (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. Kei Shing Oh
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. Kei Shing Oh's NPI number?
Dr. Kei Shing Oh's NPI number is 1356990279. It was assigned on September 4, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Kei Shing Oh?
Dr. Kei Shing Oh is a pathologist in Mason City, Iowa. The primary specialty in the NPI Registry is Anatomic Pathology & Clinical Pathology Physician (taxonomy code 207ZP0102X).
Where does Dr. Kei Shing Oh practice?
Dr. Oh practices at 1000 Fourth Street SW, Mason City, IA 50401. Dr. Oh's primary practice is MercyOne North Iowa Medical Center in Mason City, Iowa, part of Trinity Health. Dmand AI also links Dr. Oh to 4 hospitals and 1 hospice.
What is Dr. Kei Shing Oh's office phone number?
The practice phone on file for Dr. Oh is (641) 428-7000.
What is Dr. Kei Shing Oh's medical license number?
Dr. Oh holds Florida license TRN29708.
Which hospitals is Dr. Kei Shing Oh affiliated with?
Dr. Oh practices at MercyOne North Iowa Medical Center in Mason City, Iowa. Dr. Oh is also affiliated with Floyd County Medical Center. Dmand AI links Dr. Oh to 4 more hospitals.
What medical group is Dr. Kei Shing Oh part of?
Dr. Oh is linked to Pathology Associates of Mason City.
Does Dr. Kei Shing Oh accept Medicare?
Yes. CMS data shows Dr. Oh billed Medicare for 1,546 services in 2024, and Dr. Oh accepts Medicare assignment.
How many Medicare patients does Dr. Kei Shing Oh see?
CMS counts 646 Medicare patients who saw Dr. Oh in 2024, with an average age of 75.
What services does Dr. Kei Shing Oh bill to Medicare?
In 2024, Dr. Oh's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88341) and lab and pathology test (88342).
Has Dr. Kei Shing Oh received payments from drug or device companies?
CMS Open Payments shows $778 in general payments to Dr. Oh from 9 companies from 2019 to 2024. The largest total came from Genentech, Inc.
How long has Dr. Kei Shing Oh been practicing?
Dr. Oh graduated from medical school in 2016, 10 years ago.
Selling to anatomic pathology and clinical pathology practices?
See pathologists in Iowa by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card