Mary Hearne, APN
NPI 1639609852 · Nurse Practitioner · San Marcos, TX
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Hearne, APN is a Nurse Practitioner provider in San Marcos, TX (NPI 1639609852).
Provider details
- NPI number
- 1639609852
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APN
- Sex
- Female
- Sole proprietor
- No
- License
- AP132131 (TX)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
102 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 79 | $103 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 12 | $12 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 11 | $106 |
Typical Medicare-allowed amounts for these services range $12–$106 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 74 | 27 |
| Amlodipine Besylate | 66 | 27 |
| Metoprolol Succinate | 61 | 23 |
| Carvedilol | 55 | 19 |
| Apixabanbrand: Eliquis | 52 | 16 |
| Losartan Potassium | 52 | 16 |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-06-20
- Last updated
- 2026-01-13
- Certified
- 2026-01-13
Frequently asked questions
- What is Mary Hearne's NPI number?
- Mary Hearne's National Provider Identifier (NPI) is 1639609852, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Hearne's specialty?
- Mary Hearne is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Hearne located?
- Mary Hearne's practice location on file with NPPES is 1251 Sadler East Dr, San Marcos, TX 78666.
- What is Mary Hearne's phone number?
- The practice phone number listed in the NPPES registry for Mary Hearne is (512) 396-5603.
- Does Mary Hearne accept Medicare?
- Mary Hearne is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Hearne's NPI active?
- Yes — Mary Hearne's NPI (1639609852) is active in the NPPES registry as of the last update on 2026-01-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.