Charles John Hammer, M.D.
Dermatology Physician · Littleton, NH
Charles John Hammer, M.D. is a dermatology physician with a practice address in Littleton, New Hampshire, and NPI 1063456226, issued on Jun 16, 2006. Check the license (New Hampshire 9247, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Charles John Hammer
- Credential
- M.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License numbers
- 9247 NH
042-0008974 VT
Self-reported in NPPES; status is on the state search - Practice location
- 580 Saint Johnsbury RD, Littleton, NH 03561
- Phone
- (603) 444-2002
- Enumerated
- Jun 16, 2006
- Record last updated
- Dec 29, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicaid IDs
- 80003223 NH
0RE3223 VT - Medicare enrollment
- Enrolled (PECOS I20051105000158); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1987
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 89 in New Hampshire → Look up another NPI →
Also registered at 580 Saint Johnsbury RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Arrington, M.D.Surgery Physician1104872738
- Stephane CampagnaPrimary Care Nurse Practitioner1932665312
- Angela Deforrest, PA-CPhysician Assistant1578625885
- Kathleen Govatski, C.N.M., A.R.N.P.Advanced Practice Midwife1215986922
- Waverly Green, MDPulmonary Disease Physician1235123191
- Angela Hawkins, PA-CGeneral Practice Physician1538141007
Verify Charles John Hammer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 9247Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% more Medicare Part D claims than the average dermatology physician in 2024
1,351 Medicare Part D claims for 447 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Triamcinolone Acetonide190 claims
- Fluorouracil87 claims
- Ketoconazole87 claims
- Methotrexate76 claims
- Cosentyx Sensoready (2 Pens)60 claims
- Humira Pen59 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 76 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Dartmouth-Hitchcock ClinicLebanon, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Charles John Hammer among 89 dermatology physician records in New Hampshire
Charles John Hammer, M.D. is one of 89 dermatology physician 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 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 56% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1987 · median 2007 among the 64 with a school on file
- Record last updated2013 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in New Hampshire
There are 89 dermatology physician records in New Hampshire.
All 89 in New Hampshire → Every provider in Littleton → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Andrea Pearson, MDNelson, NH 034571841440112
- Jorge Crespo, MDChesterfield, NH 034431881633568
- Mahin Alamgir, MDKeene, NH 034311619351897
- Ashley Group, MDKeene, NH 034311558528406
- Robert Guardiano, D.O.Keene, NH 034311568435386
- David Horne, MDKeene, NH 034311568442093
- Gregory Seymour, M.D.Keene, NH 034311851316152
- Jose Peraza, M.D.Claremont, NH 037431033289020
Common questions
What is Charles John Hammer, M.D.'s NPI number?
Charles John Hammer, M.D.'s National Provider Identifier (NPI) is 1063456226, issued on Jun 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Charles John Hammer, M.D. located?
The NPPES record lists a practice address at 580 Saint Johnsbury RD, Littleton, NH, 03561. Phone: (603) 444-2002. Providers update this record themselves, so call before visiting.
How can I verify Charles John Hammer, M.D.'s license?
NPPES lists New Hampshire license number 9247, 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 Charles John Hammer, M.D. prescribe under Medicare Part D?
In 2024, Charles John Hammer, M.D. had 1,351 Medicare Part D claims for 447 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is Charles John Hammer, M.D.'s MIPS final score?
The 2023 MIPS final score is 76 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.