Mary Karis, CRNP
NPI 1790448355 · Nurse Practitioner · Hummelstown, PA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Karis, CRNP is a Nurse Practitioner provider in Hummelstown, PA (NPI 1790448355).
Provider details
- NPI number
- 1790448355
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CRNP
- Sex
- Female
- Sole proprietor
- Yes
- License
- SP024534 (PA)
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
4 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
250 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 | 68 | $103 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 58 | $72 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 31 | $9 |
| 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'SG2211 | 27 | $13 |
| Annual, Face-To-Face Intensive Behavioral Therapy for Cardiovascular Disease, Individual, 15 MinutesG0446 | 18 | $20 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 57 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 131 | 43 |
| Rosuvastatin Calcium | 112 | 37 |
| Lisinopril | 111 | 37 |
| Amlodipine Besylate | 94 | 30 |
| Doxycycline Monohydrate | 82 | 73 |
| Levothyroxine Sodium | 78 | 23 |
| Montelukast Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$393 across 16 records (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
- 2021-10-20
- Last updated
- 2024-12-17
- Certified
- 2024-12-17
Frequently asked questions
- What is Mary Karis's NPI number?
- Mary Karis's National Provider Identifier (NPI) is 1790448355, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Karis's specialty?
- Mary Karis is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Karis located?
- Mary Karis's practice location on file with NPPES is 300 E Main St, Hummelstown, PA 17036-1725.
- What is Mary Karis's phone number?
- The practice phone number listed in the NPPES registry for Mary Karis is (717) 566-1100.
- Does Mary Karis accept Medicare?
- Mary Karis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Karis's NPI active?
- Yes — Mary Karis's NPI (1790448355) is active in the NPPES registry as of the last update on 2024-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.