Mary Katherine Hearne, APN
Nurse Practitioner · San Marcos, TX
Mary Katherine Hearne, APN is a nurse practitioner with a practice address in San Marcos, Texas, and NPI 1639609852, issued on Jun 20, 2017. Check the license (Texas AP132131, as entered in NPPES) with the Texas board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Katherine Hearne
- Credential
- APN
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- AP132131 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1251 Sadler East Dr, San Marcos, TX 78666
- Phone
- (512) 396-5603
- Enumerated
- Jun 20, 2017
- Record last updated
- Jan 13, 2026
- Medicare enrollment
- Enrolled (PECOS I20171026001183); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 4,825 in Texas → Look up another NPI →
Verify Mary Katherine Hearne in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Texas board licenses this profession
Search for license AP132131Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average nurse practitioner in 2024
896 Medicare Part D claims for 214 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Rosuvastatin Calcium74 claims
- Amlodipine Besylate66 claims
- Metoprolol Succinate61 claims
- Carvedilol55 claims
- Eliquis52 claims
- Losartan Potassium52 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
- St Davids Heart And Vascular PLLCSan Marcos, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Katherine Hearne among 4,825 nurse practitioner records in Texas
Mary Katherine Hearne, APN is one of 4,825 nurse practitioner records with a practice address in Texas. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 43% of them.
- NPI issued2017 · 43% of these records are older, 52% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated2016 · median 2018 among the 2,618 with a school on file
- Record last updated2026 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
15 nurse practitioner records list a practice address in San Marcos
They are 15 of the 1,003 NPPES records with a practice address in San Marcos, and 4,825 nurse practitioner records in Texas.
All 4,825 in Texas → Every provider in San Marcos → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Bianca BlackstoneSan Marcos, TX 786661043098775
- Kevin Burkett, F.N.P.San Marcos, TX 786661619977865
- Bobby Carter, FNPSan Marcos, TX 786661689212060
- Taylor Cloy, APNPSan Marcos, TX 786661770040677
- Kristie Dapp, APRN-BC,FNPSan Marcos, TX 786661538255781
- Joelle GironSan Marcos, TX 786661548958093
- Karol Holman, N.P.San Marcos, TX 786661639107170
- Kellie Reardon, FNPSan Marcos, TX 786661487645404
Common questions
What is Mary Katherine Hearne, APN's NPI number?
Mary Katherine Hearne, APN's National Provider Identifier (NPI) is 1639609852, issued on Jun 20, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Mary Katherine Hearne, APN located?
The NPPES record lists a practice address at 1251 Sadler East Dr, San Marcos, TX, 78666. Phone: (512) 396-5603. Providers update this record themselves, so call before visiting.
How can I verify Mary Katherine Hearne, APN's license?
NPPES lists Texas license number AP132131, as entered by the provider. Search the Texas board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Katherine Hearne, APN prescribe under Medicare Part D?
In 2024, Mary Katherine Hearne, APN had 896 Medicare Part D claims for 214 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.