NPPES file of Aug 9, 2026

Neil J. Markwith, M.D.

Internal Medicine Physician · Manchester, NH

Neil J. Markwith, M.D. is an internal medicine physician with a practice address in Manchester, New Hampshire, and NPI 1982696647, issued on Aug 18, 2005. Check the license (New Hampshire 5961, as entered in NPPES) on the New Hampshire Board of Medicine; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1982696647
Name
Neil J. Markwith
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
5961 NH
Self-reported in NPPES; status is on the state search
Practice location
445 Cypress St, Manchester, NH 03103
Phone
(603) 669-9450
Enumerated
Aug 18, 2005
Record last updated
Jul 13, 2026
Fax
(603) 669-1858
Medicaid ID
40209527 NH
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 673 in New Hampshire → Look up another NPI →

Also registered at 445 Cypress St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Melissa Alder, LICSWClinical Social Worker1609198670
  2. Linda Bagshaw, LCMHCMental Health Counselor1376502716
  3. Sarah Bemish, APRNPsychiatric/Mental Health Nurse Practitioner1578041117
  4. Elizabeth Chase, MDInternal Medicine Physician1255329157
  5. Shannon CollinsMental Health Counselor1902565146
  6. Tracey Coulon, LICSWClinical Social Worker1427171842

Verify Neil J. Markwith in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersNew Hampshire Board of Medicine
    Search for license 5961    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the New Hampshire license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Neil J. Markwith among 673 internal medicine physician records in New Hampshire

Neil J. Markwith, M.D. 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 not. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 92% newer
  • In a Medicare fileNo · 81% of these records are
  • In the CMS Doctors and Clinicians fileNo · 66% of these records are
  • Record last updated2026 · 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).

95 internal medicine physician records list a practice address in Manchester

They are 95 of the 4,401 NPPES records with a practice address in Manchester, and 673 internal medicine physician records in New Hampshire. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 673 in New Hampshire → Every provider in Manchester → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Jonathan Briggs, MDManchester, NH 031031194798553
  2. Elizabeth Chase, MDManchester, NH 031031255329157
  3. Robert Fitzgerald, MDManchester, NH 031031992796957
  4. Timothy French, M.D.Manchester, NH 031031487618567
  5. Angel Honor, M.D.Manchester, NH 031031467408500
  6. Todd Mellish, DOManchester, NH 031031255380044
  7. Spiros Mitsopoulos, MDManchester, NH 031031720034390
  8. Gunjan Panesar, M.D.Manchester, NH 031031942278544

Common questions

What is Neil J. Markwith, M.D.'s NPI number?

Neil J. Markwith, M.D.'s National Provider Identifier (NPI) is 1982696647, issued on Aug 18, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Neil J. Markwith, M.D. located?

The NPPES record lists a practice address at 445 Cypress St, Manchester, NH, 03103. Phone: (603) 669-9450. Providers update this record themselves, so call before visiting.

How can I verify Neil J. Markwith, M.D.'s license?

NPPES lists New Hampshire license number 5961, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.