Connie Hai-Yee Chan, M.D.
Emergency Medicine Physician · Gaithersburg, MD
Connie Hai-Yee Chan, M.D. is an emergency medicine physician with a practice address in Gaithersburg, Maryland, and NPI 1477738144, issued on Dec 31, 2007. Check the license on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Connie Hai-Yee Chan
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- MD17165 HI
A111937 CA
002640 GA
Self-reported in NPPES; status is on the state search - Practice location
- 655 Watkins Mill RD, Gaithersburg, MD 20879
- Phone
- (240) 632-4224
- Enumerated
- Dec 31, 2007
- Record last updated
- Jun 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,190 in Maryland → Look up another NPI →
Also registered at 655 Watkins Mill RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Connie Hai-Yee Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of PhysiciansCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average emergency medicine physician in 2024
187 Medicare Part D claims for 170 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims.
Most prescribed
- Paxlovid51 claims
- Amoxicillin-Clavulanate Potass16 claims
- Nitrofurantoin Mono-Macro16 claims
- Doxycycline Monohydrate13 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.
Connie Hai-Yee Chan among 1,190 emergency medicine physician records in Maryland
Connie Hai-Yee Chan, M.D. is one of 1,190 emergency medicine physician records with a practice address in Maryland. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 49% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 48% of these records are
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Maryland
There are 1,190 emergency medicine physician records in Maryland.
All 1,190 in Maryland → Every provider in Gaithersburg → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Benjamin Barlow, MDGaithersburg, MD 208791699931808
- Peter Bluvas, M.D.Gaithersburg, MD 208791013150606
- Marita Broome, M.D.Gaithersburg, MD 208791194793455
- Utpal InamdarGaithersburg, MD 208791659545564
- Mehwish Karim, D.O.Gaithersburg, MD 208791073891545
- Carole Levy, MDGaithersburg, MD 208791881668804
- Jonathan McCauley, MDGaithersburg, MD 208791659391803
- Rakesh Patel, MDGaithersburg, MD 208791861657520
Common questions
What is Connie Hai-Yee Chan, M.D.'s NPI number?
Connie Hai-Yee Chan, M.D.'s National Provider Identifier (NPI) is 1477738144, issued on Dec 31, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Connie Hai-Yee Chan, M.D. located?
The NPPES record lists a practice address at 655 Watkins Mill RD, Gaithersburg, MD, 20879. Phone: (240) 632-4224. Providers update this record themselves, so call before visiting.
How can I verify Connie Hai-Yee Chan, M.D.'s license?
Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Connie Hai-Yee Chan, M.D. prescribe under Medicare Part D?
In 2024, Connie Hai-Yee Chan, M.D. had 187 Medicare Part D claims for 170 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.