Zachary Clyde Terwilliger, M.D.
Emergency Medicine Physician · Daytona Beach, FL
Zachary Clyde Terwilliger, M.D. is an emergency medicine physician with a practice address in Daytona Beach, Florida, and NPI 1881058881, issued on Apr 6, 2016. Check the license (Florida ME138339, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Zachary Clyde Terwilliger
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- ME138339 FL
Self-reported in NPPES; status is on the state search - Practice location
- 303 N Clyde Morris Blvd, Daytona Beach, FL 32114
- Phone
- (386) 425-2285
- Enumerated
- Apr 6, 2016
- Record last updated
- Jul 10, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (386) 425-7522
- Medicare enrollment
- Enrolled (PECOS I20190724003216); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 4,034 in Florida → Look up another NPI →
Also registered at 303 N Clyde Morris Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Zachary Clyde Terwilliger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ME138339Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% more Medicare Part D claims than the average emergency medicine physician in 2024
292 Medicare Part D claims for 190 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 44 claims were for opioids.
Most prescribed
- Oxycodone-Acetaminophen33 claims
- Ibuprofen24 claims
- Prednisone21 claims
- Cefdinir16 claims
- Doxycycline Hyclate16 claims
- Cephalexin12 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: $47.22
2 payments; by number, the most common kind was food and beverage; the largest payer was Inari Medical, Inc. The 12,335 providers of this specialty with any payment received $953.79 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.
Bills Medicare through 2 group practices
- Emergency Physicians OF Central Florida LLPOrlando, FL
- Halifax Healthcare Systems IncDaytona Bch, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zachary Clyde Terwilliger among 4,034 emergency medicine physician records in Florida
Zachary Clyde Terwilliger, M.D. is one of 4,034 emergency medicine physician records with a practice address in Florida. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 69% of them.
- NPI issued2016 · 69% of these records are older, 28% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2016 · median 2013 among the 2,199 with a school on file
- Record last updated2019 · 56% 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 Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
76 emergency medicine physician records list a practice address in Daytona Beach
They are 76 of the 2,817 NPPES records with a practice address in Daytona Beach, and 4,034 emergency medicine physician records in Florida.
All 4,034 in Florida → Every provider in Daytona Beach → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Larry Alexander, MDDaytona Beach, FL 321141780767517
- Hung Doan, MDDaytona Beach, FL 321141780757484
- James Klein, M.D.Daytona Beach, FL 321141578591384
- Matthew Kocisko, MDDaytona Beach, FL 321141477627107
- Kevin Macmahon, MDDaytona Beach, FL 321141982778668
- William Meek, MDDaytona Beach, FL 321141396819009
- Janet Mesri, MDDaytona Beach, FL 321141285687277
- Gary Morrison, MDDaytona Beach, FL 321141073687695
Common questions
What is Zachary Clyde Terwilliger, M.D.'s NPI number?
Zachary Clyde Terwilliger, M.D.'s National Provider Identifier (NPI) is 1881058881, issued on Apr 6, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Zachary Clyde Terwilliger, M.D. located?
The NPPES record lists a practice address at 303 N Clyde Morris Blvd, Daytona Beach, FL, 32114. Phone: (386) 425-2285. Providers update this record themselves, so call before visiting.
How can I verify Zachary Clyde Terwilliger, M.D.'s license?
NPPES lists Florida license number ME138339, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Zachary Clyde Terwilliger, M.D. prescribe under Medicare Part D?
In 2024, Zachary Clyde Terwilliger, M.D. had 292 Medicare Part D claims for 190 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.