Katherine Gagan, MD
Family Medicine Physician · Plymouth, NH
Katherine Gagan, MD is a family medicine physician with a practice address in Plymouth, New Hampshire, and NPI 1770148850, issued on May 5, 2019. Check the license (New Hampshire 22604, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Katherine Gagan
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 22604 NH
Self-reported in NPPES; status is on the state search - Practice location
- 101 Boulder Point Dr Ste 1, Plymouth, NH 03264
- Phone
- (603) 536-4000
- Enumerated
- May 5, 2019
- Record last updated
- Aug 4, 2023
- Fax
- (603) 536-4001
- Medicare enrollment
- Enrolled (PECOS I20220808001208); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 101 Boulder Point Dr Ste 1
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danette ColellaPediatrics Physician1033109095
- Jason Forster, PA-CPhysician Assistant1114301876
- Kristina Foss, FNPFamily Nurse Practitioner1073861191
- Tasha Gallup, PA-CMedical Physician Assistant1679973390
- Jennelle Guiod, APRN FNP-BCFamily Nurse Practitioner1154094530
- Carolyn Haskell, D.O.Family Medicine Physician1376524595
Verify Katherine Gagan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 22604Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% fewer Medicare Part D claims than the average family medicine physician in 2024
3,177 Medicare Part D claims for 334 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 84 claims were for opioids.
Most prescribed
- Atorvastatin Calcium190 claims
- Levothyroxine Sodium122 claims
- Amlodipine Besylate116 claims
- Lisinopril103 claims
- Metoprolol Tartrate91 claims
- Gabapentin71 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: $563.50
30 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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 2 group practices
- Cora Health Services IncThe Villages, FL
- Mid-State Health CenterAlexandria, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
11 family medicine physician records list a practice address in Plymouth
They are 11 of the 303 NPPES records with a practice address in Plymouth, and 816 family medicine physician records in New Hampshire.
All 11 in Plymouth → All 816 in New Hampshire → Every provider in Plymouth →
Other family medicine physician records in New Hampshire
- Ruba Abdullah, MDConcord, NH1336871524
- Iryna Aberkorn, MDLebanon, NH1780846071
- Bruce Abramowitz, DOWindham, NH1801276167
- Francis Adams, MDLebanon, NH1578581898
- Glenn Adams, DOGroveton, NH1952387714
- Karin Adelman, M.D.Nashua, NH1982674354
- Sangita Agarwal, MDDover, NH1912953316
- Andres Aguilera-Fish, MDLittleton, NH1578183992
- Noor Al Humaidhi, MDExeter, NH1821502329
- Keenan Al-Hojerry, MDPortsmouth, NH1063468981
Common questions
What is Katherine Gagan, MD's NPI number?
Katherine Gagan, MD's National Provider Identifier (NPI) is 1770148850, issued on May 5, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Gagan, MD located?
The NPPES record lists a practice address at 101 Boulder Point Dr Ste 1, Plymouth, NH, 03264. Phone: (603) 536-4000. Providers update this record themselves, so call before visiting.
How can I verify Katherine Gagan, MD's license?
NPPES lists New Hampshire license number 22604, as entered by the provider. Search the New Hampshire Board of Medicine at https://www.oplc.nh.gov/board-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katherine Gagan, MD prescribe under Medicare Part D?
In 2024, Katherine Gagan, MD had 3,177 Medicare Part D claims for 334 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.