Karissa N. Fox Koscheski, PA-C
Physician Assistant · Merrimack, NH
Karissa N. Fox Koscheski, PA-C is a physician assistant with a practice address in Merrimack, New Hampshire, and NPI 1518460229, issued on Mar 9, 2018. Check the license (New Hampshire 2035, as entered in NPPES) with the New Hampshire board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karissa N. Fox Koscheski
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- 2035 NH
2018004207 MO
Self-reported in NPPES; status is on the state search - Practice location
- 2 Dobson Way, Merrimack, NH 03054
- Phone
- (603) 471-6069
- Enumerated
- Mar 9, 2018
- Record last updated
- Nov 15, 2023
- Fax
- (603) 471-6068
- Medicare enrollment
- Enrolled (PECOS I20230718002264); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 947 in New Hampshire → Look up another NPI →
Also registered at 2 Dobson Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christine Breton, FNP-BCNurse Practitioner1629446133
- Melanie Chhoeun, PA-CPhysician Assistant1760116917
- Kristin Ducharme, APRNNurse Practitioner1184394827
- Sierra Jewett, FNP-CFamily Nurse Practitioner1306325568
- Shana Levander, APRNFamily Nurse Practitioner1932451135
- Sarah Saurman, FNP-BCFamily Nurse Practitioner1730661224
Verify Karissa N. Fox Koscheski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New Hampshire board licenses this profession
Search for license 2035Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% fewer Medicare Part D claims than the average physician assistant in 2024
337 Medicare Part D claims for 212 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Atorvastatin Calcium31 claims
- Carvedilol25 claims
- Prednisone20 claims
- Amoxicillin-Clavulanate Potass19 claims
- Albuterol Sulfate Hfa18 claims
- Nitrofurantoin Mono-Macro15 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 2 group practices
- Appledore Medical Group IncManchester, NH
- Convenientmd - Ffs UC LLCMerrimack, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karissa N. Fox Koscheski among 947 physician assistant records in New Hampshire
Karissa N. Fox Koscheski, PA-C is one of 947 physician assistant records with a practice address in New Hampshire. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 54% of them.
- NPI issued2018 · 54% of these records are older, 40% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2017 · median 2017 among the 730 with a school on file
- Record last updated2023 · 37% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physician Assistant providers in New Hampshire
There are 947 physician assistant records in New Hampshire.
All 947 in New Hampshire → Every provider in Merrimack → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Melanie Chhoeun, PA-CMerrimack, NH 030541760116917
- Jaime-Lea Meyer, PA-CMerrimack, NH 030541750661401
- Heema Bhagat, PALondonderry, NH 030531275152282
- Sarah Breau, PA-CLondonderry, NH 030531679816847
- Dominique Colvard, PALondonderry, NH 030531861131898
- Kelsey Crawford, PAMilford, NH 030551235600032
- Jamin Gerry, PA-CLondonderry, NH 030531336874999
- Keely Hanson, PA-CLondonderry, NH 030531205142924
Common questions
What is Karissa N. Fox Koscheski, PA-C's NPI number?
Karissa N. Fox Koscheski, PA-C's National Provider Identifier (NPI) is 1518460229, issued on Mar 9, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Karissa N. Fox Koscheski, PA-C located?
The NPPES record lists a practice address at 2 Dobson Way, Merrimack, NH, 03054. Phone: (603) 471-6069. Providers update this record themselves, so call before visiting.
How can I verify Karissa N. Fox Koscheski, PA-C's license?
NPPES lists New Hampshire license number 2035, as entered by the provider. Search the New Hampshire board that licenses this profession; the NPPES record confirms identity only.
How much does Karissa N. Fox Koscheski, PA-C prescribe under Medicare Part D?
In 2024, Karissa N. Fox Koscheski, PA-C had 337 Medicare Part D claims for 212 beneficiaries; the average among physician assistant prescribers was 830. 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.