Ruby Kwak, MD
Dermatology Physician · Ann Arbor, MI
Ruby Kwak, MD is a dermatology physician with a practice address in Ann Arbor, Michigan, and NPI 1124606512, issued on Mar 29, 2021. Check the license (Michigan 4301517523, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Ruby Kwak
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- 4301517523 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
- Phone
- (734) 936-4000
- Enumerated
- Mar 29, 2021
- Record last updated
- Jun 23, 2026
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 471 in Michigan → Look up another NPI →
Also registered at 1500 E Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ruby Kwak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301517523Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average dermatology physician in 2024
53 Medicare Part D claims for 13 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D.
Most prescribed
- Ketoconazole16 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $536.78
10 payments; by number, the most common kind was food and beverage; the largest payer was Dermavant Sciences, Inc. The 10,250 providers of this specialty with any payment received $8,544.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Ruby Kwak among 471 dermatology physician records in Michigan
Ruby Kwak, MD is one of 471 dermatology physician records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 86% of them.
- NPI issued2021 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2026 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in Michigan
There are 471 dermatology physician records in Michigan.
All 471 in Michigan → Every provider in Ann Arbor → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Andrzej Dlugosz, MDAnn Arbor, MI 481091295822047
- James Elder, M.D., PH.D.Ann Arbor, MI 481091184716110
- Charles Ellis, MDAnn Arbor, MI 481091053406793
- Johann Gudjonsson, MDAnn Arbor, MI 481091710004866
- Yolanda Helfrich, MDAnn Arbor, MI 481091003903873
- Ritika Khandpur, M.D.Ann Arbor, MI 481091396003612
- Mathew Ludgate, MDAnn Arbor, MI 481091063425767
- Julie Mervak, MDAnn Arbor, MI 481091932495827
Common questions
What is Ruby Kwak, MD's NPI number?
Ruby Kwak, MD's National Provider Identifier (NPI) is 1124606512, issued on Mar 29, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Ruby Kwak, MD located?
The NPPES record lists a practice address at 1500 E Medical Center Dr, Ann Arbor, MI, 48109. Phone: (734) 936-4000. Providers update this record themselves, so call before visiting.
How can I verify Ruby Kwak, MD's license?
NPPES lists Michigan license number 4301517523, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ruby Kwak, MD prescribe under Medicare Part D?
In 2024, Ruby Kwak, MD had 53 Medicare Part D claims for 13 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.