Zachary Hamilton, MD
Obstetrics & Gynecology Physician · Cedar Park, TX
Zachary Hamilton, MD is an obstetrics & gynecology physician with a practice address in Cedar Park, Texas, and NPI 1598185845, issued on Apr 24, 2014. Check the license (Texas R3335, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Zachary Hamilton
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- R3335 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1401 Medical Pkwy Ste 220, Cedar Park, TX 78613
- Phone
- (512) 260-1581
- Enumerated
- Apr 24, 2014
- Record last updated
- Jun 18, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (512) 406-7309
- Medicaid IDs
- 388451201 TX
388451202 TX - Medicare enrollment
- Enrolled (PECOS I20180906000556); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 3,524 in Texas → Look up another NPI →
Also registered at 1401 Medical Pkwy Ste 220
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gushyalatha Boya, MDInternal Medicine Physician1679777270
- Jayme Evans, JAYME EVANSObstetrics & Gynecology Physician1508186495
- Daniel Halloran, DPMFoot & Ankle Surgery Podiatrist1831304104
- David Kung, M.D.Rheumatology Physician1134474653
Verify Zachary Hamilton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license R3335Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
104 Medicare Part D claims for 37 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Oxybutynin Chloride Er23 claims
- Estradiol14 claims
- Valacyclovir13 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
- Christus Trinity ClinicTyler, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zachary Hamilton among 3,524 obstetrics & gynecology physician records in Texas
Zachary Hamilton, MD is one of 3,524 obstetrics & gynecology physician records with a practice address in Texas. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 75% of them.
- NPI issued2014 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2014 · median 2005 among the 2,093 with a school on file
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 obstetrics & gynecology physician records list a practice address in Cedar Park
They are 17 of the 1,650 NPPES records with a practice address in Cedar Park, and 3,524 obstetrics & gynecology physician records in Texas.
All 3,524 in Texas → Every provider in Cedar Park → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Jonathan Buten, M.D.Cedar Park, TX 786131417054495
- Adam Carlton, MDCedar Park, TX 786131619964228
- Jean Cole, M.D.Cedar Park, TX 786131962451807
- Sabrina Collins, M.D.Cedar Park, TX 786131881761187
- Virginie Drummond, MDCedar Park, TX 786131437416369
- Jayme Evans, JAYME EVANSCedar Park, TX 786131508186495
- Miranda McMillin, M.D.Cedar Park, TX 786131568720555
- Jennifer Meadows, MDCedar Park, TX 786131225247349
Common questions
What is Zachary Hamilton, MD's NPI number?
Zachary Hamilton, MD's National Provider Identifier (NPI) is 1598185845, issued on Apr 24, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Zachary Hamilton, MD located?
The NPPES record lists a practice address at 1401 Medical Pkwy Ste 220, Cedar Park, TX, 78613. Phone: (512) 260-1581. Providers update this record themselves, so call before visiting.
How can I verify Zachary Hamilton, MD's license?
NPPES lists Texas license number R3335, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Zachary Hamilton, MD prescribe under Medicare Part D?
In 2024, Zachary Hamilton, MD had 104 Medicare Part D claims for 37 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.