Lorenzo W. Klein, MD
Critical Care Medicine (Internal Medicine) Physician · Nashua, NH
Lorenzo W. Klein, MD is a critical care medicine (internal medicine) physician with a practice address in Nashua, New Hampshire, and NPI 1659489680, issued on Aug 29, 2006. Check the license (New Hampshire 14801, as entered in NPPES) on the New Hampshire Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Lorenzo W. Klein
- Credential
- MD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- 14801 NH
Self-reported in NPPES; status is on the state search - Practice location
- 10 Prospect St Ste 401, Nashua, NH 03060
- Phone
- (603) 886-0290
- Enumerated
- Aug 29, 2006
- Record last updated
- Nov 26, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (603) 577-3228
- Medicaid ID
- 3074350 NH
- Medicare enrollment
- Enrolled (PECOS I20100924000113); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 22 in New Hampshire → Look up another NPI →
Also registered at 10 Prospect St Ste 401
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth Birch, APRNFamily Nurse Practitioner1497509806
- Allison Borland, NPFamily Nurse Practitioner1417627472
- Branko Kesler, MDPulmonary Disease Physician1659366193
- Sharon Smith, PAMedical Physician Assistant1558662213
Verify Lorenzo W. Klein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Hampshire Board of Medicine
Search for license 14801Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 3 group practices
- Foundation Medical Partners IncNashua, NH
- Mass General Brigham Medical Group Suburban Massachusetts IncNewton, MA
- Mount Auburn Professional Services IncCambridge, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lorenzo W. Klein among 22 critical care medicine (internal medicine) physician records in New Hampshire
Lorenzo W. Klein, MD is one of 22 critical care medicine (internal medicine) physician records with a practice address in New Hampshire. 91% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 50% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 86% of these records are
- Graduated2002 · median 2003 among the 19 with a school on file
- Record last updated2019 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in New Hampshire
There are 22 critical care medicine (internal medicine) physician records in New Hampshire.
All 22 in New Hampshire → Every provider in Nashua → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Bjorn Flora, MDNashua, NH 030601225390529
- Christopher Brauer, MDManchester, NH 031031366411647
- Ryan Clouser, D.O.Manchester, NH 031031780650382
- Kevin Desrosiers, MD, MPHManchester, NH 031031306062054
- Jennifer Duprey, DOManchester, NH 031031982772836
- Henry Ess, DOManchester, NH 031031922032671
- Tipton Hartman-Heaney, D.O.Manchester, NH 031031205037801
- Stephen Loosigian, DOManchester, NH 031031477522753
Common questions
What is Lorenzo W. Klein, MD's NPI number?
Lorenzo W. Klein, MD's National Provider Identifier (NPI) is 1659489680, issued on Aug 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Lorenzo W. Klein, MD located?
The NPPES record lists a practice address at 10 Prospect St Ste 401, Nashua, NH, 03060. Phone: (603) 886-0290. Providers update this record themselves, so call before visiting.
How can I verify Lorenzo W. Klein, MD's license?
NPPES lists New Hampshire license number 14801, 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. 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.