Joseph Francis Karnish, D. O.
Family Medicine Physician · Georgetown, DE
Joseph Francis Karnish, D. O. is a family medicine physician with a practice address in Georgetown, Delaware, and NPI 1427002690, issued on May 20, 2006. Check the license (Delaware C20003297, as entered in NPPES) on the Delaware Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- Joseph Francis Karnish
- Credential
- D. O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- C20003297 DE
Self-reported in NPPES; status is on the state search - Practice location
- 505 W Market St, Georgetown, DE 19947
- Phone
- (302) 856-7099
- Enumerated
- May 20, 2006
- Record last updated
- Nov 12, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (302) 856-3247
- Medicaid IDs
- 0000030403 DE
0000133204 DE - Medicare enrollment
- Enrolled (PECOS I20100204000169); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 1985
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 505 W Market St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brittany DennisProfessional Counselor1316507338
- Latrease LawsonMental Health Counselor1437719416
- Brandon LegreeMental Health Counselor1508427576
- Lawrence ManokeyProfessional Counselor1225698244
- Janet Pedro, MDNephrology Physician1518061621
- Edith Reynolds, RNPsychiatric/Mental Health Registered Nurse1538720768
Verify Joseph Francis Karnish in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDelaware Board of Medical Licensure and Discipline
Search for license C20003297Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.9 times the Medicare Part D claims of the average family medicine physician in 2024
10,101 Medicare Part D claims for 543 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 536 claims were for opioids.
Most prescribed
- Atorvastatin Calcium464 claims
- Losartan Potassium299 claims
- Amlodipine Besylate296 claims
- Lisinopril284 claims
- Rosuvastatin Calcium249 claims
- Levothyroxine Sodium237 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: $153.68
8 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 55,478 providers of this specialty with any payment received $902.55 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
- Tidalhealth Physician Network, Inc.Seaford, DE
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
9 family medicine physician records list a practice address in Georgetown
They are 9 of the 384 NPPES records with a practice address in Georgetown, and 518 family medicine physician records in Delaware.
All 9 in Georgetown → All 518 in Delaware → Every provider in Georgetown →
Other family medicine physician records in Delaware
- Remedios Abad, MDWilmington, DE1942374665
- Heran Abiye, MDNewark, DE1922621846
- Jerome Abrams, M.D.Dover, DE1225063829
- Bogonko AchenchiDover, DE1437817624
- Gregory Adams, M.D.Bear, DE1821009770
- Rakesh Agarwal, M.D.Wilmington, DE1679775886
- Paul Aguillon, M.D.Blades, DE1275813552
- Javed Akhtar, MDMillsboro, DE1578712592
- Glenda Albizu, MDNewark, DE1306072947
- Jose Alcala Villegas, MDNewark, DE1235872771
Common questions
What is Joseph Francis Karnish, D. O.'s NPI number?
Joseph Francis Karnish, D. O.'s National Provider Identifier (NPI) is 1427002690, issued on May 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Francis Karnish, D. O. located?
The NPPES record lists a practice address at 505 W Market St, Georgetown, DE, 19947. Phone: (302) 856-7099. Providers update this record themselves, so call before visiting.
How can I verify Joseph Francis Karnish, D. O.'s license?
NPPES lists Delaware license number C20003297, as entered by the provider. Search the Delaware Board of Medical Licensure and Discipline at https://delpros.delaware.gov/OH_VerifyLicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joseph Francis Karnish, D. O. prescribe under Medicare Part D?
In 2024, Joseph Francis Karnish, D. O. had 10,101 Medicare Part D claims for 543 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.