Mary Elizabeth Karis, CRNP
Nurse Practitioner · Hummelstown, PA
Mary Elizabeth Karis, CRNP is a nurse practitioner with a practice address in Hummelstown, Pennsylvania, and NPI 1790448355, issued on Oct 20, 2021. Check the license (Pennsylvania SP024534, as entered in NPPES) with the Pennsylvania board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Elizabeth Karis
- Credential
- CRNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- SP024534 PA
Self-reported in NPPES; status is on the state search - Practice location
- 300 E Main St, Hummelstown, PA 17036
- Phone
- (717) 566-1100
- Enumerated
- Oct 20, 2021
- Record last updated
- Dec 17, 2024
- Fax
- (717) 566-0600
- Medicare enrollment
- Enrolled (PECOS I20220119002110); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 3,916 in Pennsylvania → Look up another NPI →
Also registered at 300 E Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Timothy McDonald, MSPTPhysical Therapist1336307917
- Timothy Warren, DOFamily Medicine Physician1902435373
Verify Mary Elizabeth Karis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
Search for license SP024534Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average nurse practitioner in 2024
2,248 Medicare Part D claims for 452 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Atorvastatin Calcium131 claims
- Rosuvastatin Calcium112 claims
- Lisinopril111 claims
- Amlodipine Besylate94 claims
- Doxycycline Monohydrate82 claims
- Levothyroxine Sodium78 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.
Industry payments in 2024: $393.06
16 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Penn State Health Medical Group LLCHershey, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Elizabeth Karis among 3,916 nurse practitioner records in Pennsylvania
Mary Elizabeth Karis, CRNP is one of 3,916 nurse practitioner records with a practice address in Pennsylvania. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 71% of them.
- NPI issued2021 · 71% of these records are older, 22% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2021 · median 2018 among the 2,360 with a school on file
- Record last updated2024 · 48% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 nurse practitioner records list a practice address in Hummelstown
They are 7 of the 322 NPPES records with a practice address in Hummelstown, and 3,916 nurse practitioner records in Pennsylvania.
All 3,916 in Pennsylvania → Every provider in Hummelstown → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Eric AnangfacHummelstown, PA 170361770117301
- Jill Buchle, CRNPHummelstown, PA 170361740762764
- Kennedy Dickhoff, CRNPHummelstown, PA 170361871129635
- Sarah Grigsby, APRNHummelstown, PA 170361891476644
- Erin Livezey, CRNPHummelstown, PA 170361265473862
- Rachel Marrero, CRNPHummelstown, PA 170361043988900
- Adrianna Adam, DNPHershey, PA 170331932068269
- Sophia BarryHershey, PA 170331699611038
Common questions
What is Mary Elizabeth Karis, CRNP's NPI number?
Mary Elizabeth Karis, CRNP's National Provider Identifier (NPI) is 1790448355, issued on Oct 20, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Mary Elizabeth Karis, CRNP located?
The NPPES record lists a practice address at 300 E Main St, Hummelstown, PA, 17036. Phone: (717) 566-1100. Providers update this record themselves, so call before visiting.
How can I verify Mary Elizabeth Karis, CRNP's license?
NPPES lists Pennsylvania license number SP024534, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Elizabeth Karis, CRNP prescribe under Medicare Part D?
In 2024, Mary Elizabeth Karis, CRNP had 2,248 Medicare Part D claims for 452 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.