Tammy L. Chen, MD
Emergency Medicine Physician · Grand Blanc, MI
Tammy L. Chen, MD is an emergency medicine physician with a practice address in Grand Blanc, Michigan, and NPI 1851527071, issued on Jun 2, 2009. Check the license (Michigan 4301094407, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Tammy L. Chen
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 4301094407 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1 Genesys Pkwy, Grand Blanc, MI 48439
- Phone
- (810) 606-6372
- Enumerated
- Jun 2, 2009
- Record last updated
- Jan 4, 2022
- Medicare enrollment
- Enrolled (PECOS I20130909000489); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,083 in Michigan → Look up another NPI →
Also registered at 1 Genesys Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Maruf Ahmed, DOInternal Medicine Physician1407792476
- Muhammad Ahmed, MDFamily Medicine Physician1710800578
- Sana Ahmed, MDFamily Medicine Physician1871974592
Verify Tammy L. Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301094407Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% more Medicare Part D claims than the average emergency medicine physician in 2024
258 Medicare Part D claims for 156 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 22 claims were for opioids.
Most prescribed
- Cefadroxil20 claims
- Ciprofloxacin Hcl18 claims
- Ondansetron Odt17 claims
- Oxycodone Hcl15 claims
- Prednisone11 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.
Bills Medicare through one group practice
- Permanente Medical Group IncSacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tammy L. Chen among 3,083 emergency medicine physician records in Michigan
Tammy L. Chen, MD is one of 3,083 emergency medicine 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 2009, is newer than 38% of them.
- NPI issued2009 · 38% of these records are older, 58% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2009 · median 2013 among the 1,931 with a school on file
- Record last updated2022 · 53% 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 Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
82 emergency medicine physician records list a practice address in Grand Blanc
They are 82 of the 1,735 NPPES records with a practice address in Grand Blanc, and 3,083 emergency medicine physician records in Michigan.
All 3,083 in Michigan → Every provider in Grand Blanc → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Michael Chapman, D.O.Grand Blanc, MI 484391457557647
- Bradley Chappell, DO, MHAGrand Blanc, MI 484391144426479
- Bryan Eadie, DOGrand Blanc, MI 484391720247299
- Scott Greib, MDGrand Blanc, MI 484391154304855
- Amy KaluzaGrand Blanc, MI 484391437355229
- Kurt Keogh, MDGrand Blanc, MI 484391528041407
- Virginia Labond, MDGrand Blanc, MI 484391962485920
- Ananda Pandurangadu, M.D.Grand Blanc, MI 484391891963641
Common questions
What is Tammy L. Chen, MD's NPI number?
Tammy L. Chen, MD's National Provider Identifier (NPI) is 1851527071, issued on Jun 2, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Tammy L. Chen, MD located?
The NPPES record lists a practice address at 1 Genesys Pkwy, Grand Blanc, MI, 48439. Phone: (810) 606-6372. Providers update this record themselves, so call before visiting.
How can I verify Tammy L. Chen, MD's license?
NPPES lists Michigan license number 4301094407, 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 Tammy L. Chen, MD prescribe under Medicare Part D?
In 2024, Tammy L. Chen, MD had 258 Medicare Part D claims for 156 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.