Margaret Hemmen, RN, NP-C
NPI 1285909739 · Family Nurse Practitioner · Austin, TX
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Hemmen, RN, NP-C is a Family Nurse Practitioner provider in Austin, TX (NPI 1285909739).
Provider details
- NPI number
- 1285909739
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- RN, NP-C
- Sex
- Female
- Sole proprietor
- No
- License
- 723147 (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 tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
301 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 64 | $109 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 51 | $110 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 43 | $13 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 41 | $10 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 35 | $78 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 71 | 24 |
| Levothyroxine Sodium | 33 | — |
| Amlodipine Besylate | 31 | 12 |
| Sertraline Hcl | 21 | — |
| Fluoxetine Hcl | 21 | — |
| Lisinopril | 19 | — |
| Losartan/Hydrochlorothiazide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$116 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-03-16
- Last updated
- 2021-04-22
- Certified
- 2021-04-22
Frequently asked questions
- What is Margaret Hemmen's NPI number?
- Margaret Hemmen's National Provider Identifier (NPI) is 1285909739, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Hemmen's specialty?
- Margaret Hemmen is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margaret Hemmen located?
- Margaret Hemmen's practice location on file with NPPES is 6835 Austin Center Blvd, Austin, TX 78731-3166.
- What is Margaret Hemmen's phone number?
- The practice phone number listed in the NPPES registry for Margaret Hemmen is (512) 346-6611.
- Does Margaret Hemmen accept Medicare?
- Margaret Hemmen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Hemmen's NPI active?
- Yes — Margaret Hemmen's NPI (1285909739) is active in the NPPES registry as of the last update on 2021-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.