Ramon Hendrik Guillen
Internal Medicine Physician · Laconia, NH
Ramon Hendrik Guillen is an internal medicine physician with a practice address in Laconia, New Hampshire, and NPI 1922732734, issued on Jul 16, 2022. Check the license (New Hampshire 34222, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Ramon Hendrik Guillen
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 34222 NH
Self-reported in NPPES; status is on the state search - Practice location
- 724 N Main St, Laconia, NH 03246
- Phone
- (603) 524-9201
- Enumerated
- Jul 16, 2022
- Record last updated
- Jun 26, 2025
- Medicare enrollment
- Enrolled (PECOS I20250829004343); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 673 in New Hampshire → Look up another NPI →
Also registered at 724 N Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ramon Hendrik Guillen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 34222Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
268 Medicare Part D claims for 85 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Lisinopril24 claims
- Furosemide22 claims
- Amlodipine Besylate15 claims
- Atorvastatin Calcium15 claims
- Spironolactone13 claims
- Clopidogrel11 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 one group practice
- Concord Hospital-LaconiaLaconia, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ramon Hendrik Guillen among 673 internal medicine physician records in New Hampshire
Ramon Hendrik Guillen is one of 673 internal medicine physician records with a practice address in New Hampshire. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 94% of them.
- NPI issued2022 · 94% of these records are older, 3% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2020 · median 2005 among the 443 with a school on file
- Record last updated2025 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
29 internal medicine physician records list a practice address in Laconia
They are 29 of the 731 NPPES records with a practice address in Laconia, and 673 internal medicine physician records in New Hampshire.
All 673 in New Hampshire → Every provider in Laconia → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Reda Benhorma, MDLaconia, NH 032461881036762
- Hillary Conkling, M.D.Laconia, NH 032461699974535
- Vercin Ephrem, MDLaconia, NH 032461366468928
- Roger Gutner, M.D.Laconia, NH 032461598792426
- Brian Jeffery, MDLaconia, NH 032461184695827
- Daniel Kallmerten, MDLaconia, NH 032461710958467
- Adora Maharaj, M.D.Laconia, NH 032461982621074
- Nadia Malik, MDLaconia, NH 032461679704597
Common questions
What is Ramon Hendrik Guillen's NPI number?
Ramon Hendrik Guillen's National Provider Identifier (NPI) is 1922732734, issued on Jul 16, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Ramon Hendrik Guillen located?
The NPPES record lists a practice address at 724 N Main St, Laconia, NH, 03246. Phone: (603) 524-9201. Providers update this record themselves, so call before visiting.
How can I verify Ramon Hendrik Guillen's license?
NPPES lists New Hampshire license number 34222, 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 Ramon Hendrik Guillen prescribe under Medicare Part D?
In 2024, Ramon Hendrik Guillen had 268 Medicare Part D claims for 85 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.