Reiko Kayashima Johnson, MD
Family Medicine Physician · Somersworth, NH
Reiko Kayashima Johnson, MD is a family medicine physician with a practice address in Somersworth, New Hampshire, and NPI 1811095094, issued on Sep 20, 2006. Check the license (New Hampshire 14588, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Reiko Kayashima Johnson
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 14588 NH
MD00045624 WA
Self-reported in NPPES; status is on the state search - Practice location
- 311 Route 108, Somersworth, NH 03878
- Phone
- (603) 749-2346
- Enumerated
- Sep 20, 2006
- Record last updated
- May 17, 2022
- Fax
- (603) 953-0066
- Medicaid ID
- 3100828 NH
- Medicare enrollment
- Enrolled (PECOS I20100609000017); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 816 in New Hampshire → Look up another NPI →
Also registered at 311 Route 108
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Diane Bernard, PAMedical Physician Assistant1306822168
- Martin Bernstein, MSWClinical Social Worker1023821667
- Deirore Boryszewski, CRSWCommunity Health Worker1972018885
- John Burns, CRSWCommunity Health Worker1528573540
Verify Reiko Kayashima Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 14588Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average family medicine physician in 2024
705 Medicare Part D claims for 180 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium47 claims
- Lisinopril42 claims
- Gabapentin27 claims
- Losartan Potassium27 claims
- Albuterol Sulfate Hfa26 claims
- Metoprolol Succinate22 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: $88.58
4 payments; by number, the most common kind was food and beverage; the largest payer was Daiichi Sankyo 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
- Appledore Medical Group IncBedford, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Reiko Kayashima Johnson among 816 family medicine physician records in New Hampshire
Reiko Kayashima Johnson, MD is one of 816 family medicine physician records with a practice address in New Hampshire. 74% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 43% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2003 · median 2003 among the 498 with a school on file
- Record last updated2022 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 family medicine physician records list a practice address in Somersworth
They are 13 of the 333 NPPES records with a practice address in Somersworth, and 816 family medicine physician records in New Hampshire.
All 816 in New Hampshire → Every provider in Somersworth → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Gregory Andrecyk, MDSomersworth, NH 038781790731107
- Alexander Asch, D.O.Somersworth, NH 038781912075615
- Edwin Charle, M.D.Somersworth, NH 038781003859422
- Michael Guidi, DOSomersworth, NH 038781245322452
- Sonya Hovsepian, M.D.Somersworth, NH 038781902240286
- Girish Joshi, MDSomersworth, NH 038781316993728
- David Lunianski, DOSomersworth, NH 038781518073568
- Steven Molnar-Gabor, MDSomersworth, NH 038781598733149
Common questions
What is Reiko Kayashima Johnson, MD's NPI number?
Reiko Kayashima Johnson, MD's National Provider Identifier (NPI) is 1811095094, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Reiko Kayashima Johnson, MD located?
The NPPES record lists a practice address at 311 Route 108, Somersworth, NH, 03878. Phone: (603) 749-2346. Providers update this record themselves, so call before visiting.
How can I verify Reiko Kayashima Johnson, MD's license?
NPPES lists New Hampshire license number 14588, 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 Reiko Kayashima Johnson, MD prescribe under Medicare Part D?
In 2024, Reiko Kayashima Johnson, MD had 705 Medicare Part D claims for 180 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.