J Natl Med Assoc
Dr. Kelly Wei Wei Koay, MD
- Medicare services, 2024
- 952
- Medicare patients, 2024
- 228
- Part D claims, 2024
- 3,698
- Publications
- 1
- Hospital affiliations
- 2
- Practice address
- 600 N Wolfe St, Baltimore, MD 21287
- Practice phone
- Call (855) 662-3017
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Johns Hopkins Hospital Nelson/Harvey Building
Baltimore, Maryland
Find Dr. Koay'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. Kelly Wei Wei Koay is an internist in Baltimore, Maryland
Dr. Koay practices at Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland.
Dr. Koay's NPI, 1497975809, was assigned on April 26, 2007. Dr. Koay graduated from WashU Medicine in 2003. Dr. Koay's Georgia license number on file is 58977.
- NPI
- 1497975809NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618062043
- NPI enumeration date
- April 26, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (855) 662-3017
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kelly Wei Wei Koay practices at Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland
Dr. Koay's primary practice is Johns Hopkins Hospital Nelson/Harvey Building, at 600 N Wolfe St, Baltimore, MD 21287 in Baltimore City. The practice phone is (855) 662-3017.
- Johns Hopkins Hospital Nelson/Harvey Building600 N Wolfe St, Baltimore, MD 21287 · Baltimore CityPhone(855) 662-3017
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Kelly Wei Wei Koay is affiliated with 8 sites of care and 2 medical groups
Dr. Koay's primary practice is Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland. Dr. Koay is also affiliated with The Johns Hopkins Hospital. The medical group on file is Johns Hopkins Community Physicians. Dmand AI also links Dr. Koay to 1 more hospital, 3 home health agencies, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Kelly Wei Wei Koay's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Koay practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Johns Hopkins Hospital Nelson/Harvey Building | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Kelly Wei Wei Koay is one of 3,320 internists in Maryland
Internal medicine is Dr. Koay's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Koay is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Koay's licenses on file in 4 states: Georgia, Maryland, Tennessee and North Carolina.
Specialties and state licenses
- Internal medicine, GeorgiaPrimary
- Maryland license
- Tennessee license
- North Carolina license
Clinical focus
Dmand AI lists acid reflux, alzheimer's disease, aneurysm, arthritis, asthma, atrial fibrillation and flutter, chronic anemia and chronic diabetes among the conditions Dr. Koay treats.
Internists near Dr. Koay
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. Kelly Wei Wei Koay billed Medicare for 952 services in 2024
CMS data shows 952 Medicare services from Dr. Koay across 12 procedure codes in 2024, for 228 Medicare patients. Medicare paid $58,478 for them. Every service was in an office.
Dr. Koay's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3322024: 40321%
- Other services
- 2023: 2352024: 34547%
- Tests and treatments
- 2023: 1082024: 16452%
- Lab and pathology
- 2023: 362024: 4011%
Dr. Koay compared with the Maryland median for internists, 2024
- Dr. Koay
- Maryland median
- Medicare services
- 952vs 65645% above
- Medicare patients
- 228vs 2519% below
- Part D claims
- 3,119vs 30910.1 times
Medians across 3,215 internists in Maryland with Dmand AI profiles that report each measure.
Dr. Koay'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. Koay?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Koay and other internists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kelly Wei Wei Koay treated 228 Medicare patients in 2024, average age 70
CMS counts 228 Medicare patients who saw Dr. Koay in 2024. The largest group is 65 to 74, with 123 patients. 71% of them have high blood pressure, and 71% have high cholesterol. 14% are also on Medicaid. Their average risk score is 1.09, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Koay's median patient age at 62, with 67% women.
Dr. Koay's Medicare patients by age, 2024
Dr. Koay's Medicare patients by sex, 2024
- Women15769%
- Men7131%
Chronic conditions among Dr. Koay's Medicare patients, 2024
- High blood pressure71%
- High cholesterol71%
- Arthritis44%
- Diabetes29%
- Anxiety27%
- Mood disorders25%
- Chronic kidney disease24%
- Ischemic heart disease22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Koay'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
- Women67%
- Men32%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kelly Wei Wei Koay wrote 3,698 Medicare Part D claims in 2024
In 2024, Dr. Koay wrote 3,698 Medicare Part D claims for 296 patients. 87% of them were for generic drugs. CMS names the drug for 3,119 of them, across 69 drugs with 11 or more claims each, at $364,796 in total drug cost. In 2023, CMS named 3,207 claims across 76 drugs.
Dr. Koay's Part D claims by kind of drug, 2024
- Generic3,223 claims87%
- Brand-name456 claims12%
- Other19 claims1%
Dr. Koay's 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. Koay's Part D claims, 2024
- Antibiotics1%23 of 3,698 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,2072024: 3,1193%
Drugs named by CMS: 69 in 2024, 76 in 2023.
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. Kelly Wei Wei Koay offers telehealth to Medicare patients
Dr. Koay accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Koay as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Kelly Wei Wei Koay has 1 publication on record
Dmand AI links 1 paper to Dr. Koay. Dr. Koay's most frequent co-authors are Jimmy Chamtsum Lu, MD, Angelo S. Milazzo, MD and Christian Boyd Ramers, MD.
Dr. Koay's most frequent co-authors
- Jimmy Chamtsum Lu, MD1 shared paper
- Angelo S. Milazzo, MD1 shared paper
- Christian Boyd Ramers, MD1 shared paper
Recent publications by Dr. Koay
See who Dr. Koay researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Koay works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Kelly Wei Wei Koay received $105 in industry payments in 2016
CMS Open Payments shows 6 general payments to Dr. Koay from 3 drug and device companies in 2016. Food and beverage make up the largest share, 100% of the total. Alkermes, Inc. paid the most, $71.
Companies that paid Dr. Koay the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Kelly Wei Wei Koay has 1 award and honors on record
Dmand AI lists 1 award for Dr. Koay.
Awards and honors for Dr. Koay
- Undated
- AAP Fellow
Source: Dmand AI Professional Profile Data
Dr. Kelly Wei Wei Koay graduated from WashU Medicine
Dr. Koay graduated from WashU Medicine in 2003. Dr. Koay is a member of AAP and ACP.
- Medical school
- Board certified in internal medicine
- Board certified in pediatrics
Source: Dmand AI Professional Profile Data
Dr. Kelly Wei Wei Koay accepts plans from 6 insurance carriers
Dr. Koay is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Cigna
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
Plan types Dr. Koay accepts, by number of carriers
- HMO4
- Medicare4
- POS3
- EPO2
- PPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Kelly Wei Wei Koay'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Kelly Wei Wei Koay
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. Kelly Wei Wei Koay's NPI number?
Dr. Kelly Wei Wei Koay's NPI number is 1497975809. It was assigned on April 26, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Kelly Wei Wei Koay?
Dr. Kelly Wei Wei Koay is an internist in Baltimore, Maryland. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Kelly Wei Wei Koay practice?
Dr. Koay practices at 600 N Wolfe St, Baltimore, MD 21287. Dr. Koay's primary practice is Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland. Dmand AI also links Dr. Koay to 1 hospital, 3 home health agencies, 2 group practices and clinics and 1 medical group.
What is Dr. Kelly Wei Wei Koay's office phone number?
The practice phone on file for Dr. Koay is (855) 662-3017.
What is Dr. Kelly Wei Wei Koay's medical license number?
Dr. Koay's Georgia license number on file is 58977, one of the licenses on file in 4 states.
Which states has Dr. Kelly Wei Wei Koay been licensed in?
Dmand AI has state licenses on file for Dr. Koay in Georgia (2007 to 2010), Maryland (2016 to 2026), Tennessee (2010 to 2018) and North Carolina (2003 to 2007).
Which hospitals is Dr. Kelly Wei Wei Koay affiliated with?
Dr. Koay is affiliated with The Johns Hopkins Hospital. Dmand AI links Dr. Koay to 1 more hospital.
What medical group is Dr. Kelly Wei Wei Koay part of?
Dr. Koay is linked to Johns Hopkins Community Physicians. Dmand AI links Dr. Koay to 1 more medical group.
Does Dr. Kelly Wei Wei Koay accept Medicare?
Yes. CMS data shows Dr. Koay billed Medicare for 952 services in 2024, and Dr. Koay accepts Medicare assignment.
Does Dr. Kelly Wei Wei Koay offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Koay as offering telehealth services.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Kelly Wei Wei Koay see?
CMS counts 228 Medicare patients who saw Dr. Koay in 2024, with an average age of 70.
Is Dr. Kelly Wei Wei Koay board certified?
Yes. Dr. Koay is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Kelly Wei Wei Koay bill to Medicare?
In 2024, Dr. Koay's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and medicare service (G0439).
Where did Dr. Kelly Wei Wei Koay go to medical school?
Dr. Koay graduated from WashU Medicine in 2003.
What drugs does Dr. Kelly Wei Wei Koay prescribe most?
In 2024 Medicare Part D data, Dr. Koay's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Amlodipine Besylate.
Has Dr. Kelly Wei Wei Koay received payments from drug or device companies?
CMS Open Payments shows $105 in general payments to Dr. Koay from 3 companies from 2016 to 2016. The largest total came from Alkermes, Inc.
How long has Dr. Kelly Wei Wei Koay been practicing?
Dr. Koay graduated from medical school in 2003, 23 years ago.
Does Dr. Kelly Wei Wei Koay do research?
Dmand AI links 1 publication to Dr. Koay.
Who does Dr. Kelly Wei Wei Koay publish with?
Dr. Koay's most frequent co-authors are Jimmy Chamtsum Lu, MD (1 shared paper), Angelo S. Milazzo, MD (1 shared paper) and Christian Boyd Ramers, MD (1 shared paper).
What insurance does Dr. Kelly Wei Wei Koay accept?
Dr. Koay is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 4. Check the plan with the practice before a visit.
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