Quan C. Ai, MD
Internal Medicine Physician · Green Bay, WI
Quan C. Ai, MD is an internal medicine physician with a practice address in Green Bay, Wisconsin, and NPI 1821089616, issued on Nov 2, 2005. Check the license (Wisconsin 45551, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Quan C. Ai
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 45551 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1715 Dousman St, Green Bay, WI 54303
- Phone
- (920) 496-4700
- Enumerated
- Nov 2, 2005
- Record last updated
- May 17, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicaid ID
- 34414300 WI
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 1715 Dousman St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sara Anderson, M.D.Obstetrics & Gynecology Physician1467658302
- Lindsey Angst, OTROccupational Therapist1821322702
- Sally Bowa, APNPNurse Practitioner1932532991
- Marta Brace, CNMAdvanced Practice Midwife1386669497
Verify Quan C. Ai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 45551Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
285 Medicare Part D claims for 33 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Atorvastatin Calcium29 claims
- Levothyroxine Sodium21 claims
- Metformin Hcl20 claims
- Amlodipine Besylate19 claims
- Lisinopril18 claims
- Allopurinol13 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.
Quan C. Ai among 2,078 internal medicine physician records in Wisconsin
Quan C. Ai, MD is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2010 · 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 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
69 internal medicine physician records list a practice address in Green Bay
They are 69 of the 4,619 NPPES records with a practice address in Green Bay, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Green Bay → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Gregory Bottei, MDGreen Bay, WI 543031245255561
- Diane Christel, MDGreen Bay, WI 543031841216116
- Bruce Fenster, MDGreen Bay, WI 543031386660454
- Vaishali Gala, MDGreen Bay, WI 543031457388738
- Michael Gallagher, M.D.Green Bay, WI 543031174544555
- Richard Greene, MDGreen Bay, WI 543031619082609
- John Rank, MDGreen Bay, WI 543031336165877
- David Rentmeester, MDGreen Bay, WI 543031538186101
Common questions
What is Quan C. Ai, MD's NPI number?
Quan C. Ai, MD's National Provider Identifier (NPI) is 1821089616, issued on Nov 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Quan C. Ai, MD located?
The NPPES record lists a practice address at 1715 Dousman St, Green Bay, WI, 54303. Phone: (920) 496-4700. Providers update this record themselves, so call before visiting.
How can I verify Quan C. Ai, MD's license?
NPPES lists Wisconsin license number 45551, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Quan C. Ai, MD prescribe under Medicare Part D?
In 2024, Quan C. Ai, MD had 285 Medicare Part D claims for 33 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.